Transport road material, preparation method thereof and transport road

Abstract

The invention discloses a transportation road material and a preparation method thereof, and a transportation road, the transportation road material comprises the following raw materials by weight: 20%-30% of mineral powder, 30%-40% of Portland cement, 20%-30% of aggregate, 5%-10% of a polymer modifier, 1%-2% of a water reducer, and the balance of water. Through scientific formula design, the compressive strength, the impact resistance, the wear resistance and the weather resistance of the material are remarkably improved, and the use requirements of mining area transportation roads under the conditions of high load, high impact and atrocious weather are met. According to the material, a compact gel structure and a consolidation layer are generated, and good impact resistance, wear resistance and freeze-thaw resistance are formed. The service life of the mining road paved by the material is effectively prolonged, the maintenance cost is reduced, and the transportation efficiency is improved. Through the optimized formula and construction technology, the construction period is short, the material cost is low, and good economical efficiency and environment friendliness are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transportation road construction, and specifically relates to a transportation road material, a preparation method thereof, and a transportation road. Background Art

[0002] With the continuous expansion of the open-pit coal mine mining scale, the construction and maintenance of the mining area transportation roads have become an important part of the daily operation of coal mining enterprises. The transportation roads in the mining area need to withstand the heavy load impact of large transportation vehicles, continuous vibration, and severe erosion from the natural environment. Common mining area transportation vehicles include heavy trucks, tractors, etc. The operation of these vehicles will bring huge pressure to the roads, resulting in problems such as road surface collapse, cracks, and potholes, seriously affecting the transportation efficiency in the mining area. At the same time, most mining areas are in cold or high-temperature environments. Factors such as frequent freeze-thaw cycles, extreme temperature differences, and sand and wind erosion make the road materials face more severe tests.

[0003] Traditional road paving materials mainly include asphalt concrete, ordinary cement concrete, etc. Although these materials perform well under some conditions, they expose many deficiencies under the high-load transportation and harsh climate conditions in the mining area. Specifically, they include:

[0004] 1. Insufficient strength: The compressive and impact resistance of traditional materials is limited and cannot withstand the high-load impact force generated by the frequent passing of mining area transportation vehicles, easily leading to road surface collapse or cracking.

[0005] 2. Poor durability: The wear resistance of common traditional materials is poor. When exposed to the heavy-load transportation environment in the mining area for a long time, it is easy to wear, resulting in a significant reduction in the road surface life.

[0006] 3. Long construction period: The high-strength cement concrete has a long curing time, and the construction process requires relatively complex techniques, which affects the construction efficiency of the mining area roads and cannot meet the requirements of the mining area for quickly repairing roads.

[0007] 4. Poor environmental adaptability: Traditional materials have poor environmental adaptability. Especially in low-temperature regions, they are easily affected by freeze-thaw cycles and generate cracks; in hot regions, they are prone to problems such as cracking and swelling. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a transportation road material, a preparation method thereof, and a transportation road aiming at the above deficiencies existing in the prior art. This material is a road material with high strength, impact resistance, wear resistance, short construction period, and strong adaptability, which improves the transportation efficiency in the mining area, reduces the maintenance cost, and extends the service life of the road.

[0009] The technical solution adopted to solve the technical problems of the present invention is to provide a transportation road material, including raw materials in the following weight percentages: 20%-30% of mineral powder, 30%-40% of portland cement, 20%-30% of aggregate, 5%-10% of polymer modifier, 1%-2% of water reducing agent, and the balance being water.

[0010] The above components act synergistically to generate a high-density network structure of silicate and aluminate, forming a dense road surface structure layer, significantly enhancing the impact resistance and wear resistance.

[0011] The material in the present invention can significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of the material through scientific formula design, meeting the use requirements under high load, high impact and harsh climate conditions of mining area transportation roads. This material generates a dense gel structure and consolidation layer, forming good impact resistance, wear resistance and freeze-thaw resistance characteristics. The mining area roads paved with this material can effectively extend the service life, reduce the maintenance cost and improve the transportation efficiency. Through the optimized formula and construction process, the present invention also has a short construction period and low material cost, with good economic and environmental protection. By using industrial by-products such as fly ash and slag powder to replace part of the cement, the present invention reduces carbon dioxide emissions, meeting the requirements of green development. This material is widely used in the construction of heavy-duty traffic roads such as mining area transportation roads, industrial parks, port terminals, etc.

[0012] Preferably, the mineral powder is slag powder or fly ash.

[0013] Preferably, the mineral powder has a pozzolanic activity with a specific surface area greater than 400 m 2 / kg.

[0014] Preferably, the portland cement is a cement with a grade not lower than 42.5.

[0015] Preferably, the aggregate is quartz sand and / or basalt gravel.

[0016] Preferably, the particle size of the aggregate is less than 200 mesh.

[0017] Preferably, the polymer modifier is polyvinyl alcohol and / or polyacrylamide.

[0018] Preferably, the water reducing agent is a polycarboxylate water reducing agent.

[0019] Preferably, the water reducing agent is KJ-B type polycarboxylate anti-sludge high-performance water reducing agent and SPC-100 type polycarboxylate water reducing agent.

[0020] The functions of the raw materials are as follows:

[0021] 1. Mineral powder: The mineral powder is made of slag powder or fly ash, with a specific surface area greater than 400 m2 / kg, it has strong pozzolanic activity, can react with cement to form a dense gel layer, improving the compressive strength and durability. At the same time, the mineral powder has good freeze-thaw resistance and can effectively prevent cracks caused by freeze-thaw cycles.

[0022] 2. Portland cement: As the main binder, Portland cement provides good early strength and enhances the curing performance. It can effectively improve the compressive strength of the material and ensure that there is no serious deformation under heavy load transportation conditions.

[0023] 3. Aggregates: Selecting materials such as high-hardness quartz sand and basalt gravel can effectively enhance the wear resistance and impact resistance of the road surface. The hardness and particle size of the aggregates have a direct impact on the wear resistance of the road surface, ensuring that the mining area transportation road can withstand long-term heavy load rolling.

[0024] 4. Polymer modifiers: Polymer modifiers such as polyvinyl alcohol and polyacrylamide enhance the flexibility and crack resistance of the material through molecular cross-linking. They can effectively improve the toughness of the material, enabling it to withstand greater impact forces and avoid crack generation.

[0025] 5. Water reducers: Using polycarboxylate water reducers can optimize the water consumption of cement, enhance the fluidity of the mixture, and reduce the risk of dry shrinkage cracking. The use of water reducers helps improve construction efficiency and makes the overall density of the road surface material higher.

[0026] The present invention also provides a method for preparing the above-mentioned transportation road material, comprising the following steps:

[0027] 1) Raw material pretreatment: Mix the mineral powder and aggregates, and screen out the mixed raw materials with a preset particle size;

[0028] 2) Dry mixing: Dry mix the pretreated mineral powder, aggregates, Portland cement, polymer modifier, and water reducer to obtain a dry mix;

[0029] 3) Pulp making: Add water to the dry mix and mix to obtain a slurry;

[0030] 4) Laying and forming: Lay the slurry on the road surface base layer and compact it into shape;

[0031] 5) Curing: Cure the road surface after forming to obtain the transportation road material.

[0032] Preferably, the preset particle size of the mixed raw materials in step 1) is less than 200 mesh.

[0033] Preferably, the dry mixing time in step 2) is 3 - 5 minutes,

[0034] and the mixing time in step 3) is 5 - 8 minutes.

[0035] Preferably, the laying thickness of the compacted and formed layer in step 4) is 8-15 cm.

[0036] Preferably, the curing time in step 5) is 3-5 days.

[0037] The present invention also provides a transportation road, including a road surface base layer and transportation road materials disposed on the road surface base layer, and the transportation road materials are prepared by the above preparation method.

[0038] The high-strength impact-resistant transportation road materials provided by the present invention are mainly used for the laying of transportation roads in open-pit coal mines, and can also be widely applied to the road construction in industrial parks, high-load traffic roads and other special environments. Compared with traditional materials, the materials of the present invention

[0039] have the following advantages:

[0040] 1. High strength and impact resistance: By adding portland cement and aggregates, the compressive strength and impact resistance of the materials are enhanced, and the frequent impacts of heavy-duty transportation vehicles in mining areas can be effectively coped with.

[0041] 2. Excellent wear resistance: The combination of aggregates and polymer modifiers endows the road surface materials with strong wear resistance, prolongs the service life of the road, and reduces the maintenance cost.

[0042] 3. Short construction period: The present invention adopts an optimized formula and construction process, which can significantly shorten the construction period and has good construction adaptability.

[0043] 4. Economical and environmentally friendly: The present invention uses a large amount of industrial by-products such as fly ash and granulated blast-furnace slag powder, reduces the consumption of cement, reduces the material cost, and at the same time reduces resource waste and ecological pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a process flow chart of the preparation method of the transportation road materials in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0045] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0046] Embodiment 1

[0047] This embodiment provides a transportation road material, including raw materials in the following weight percentages: 20%-30% of mineral powder, 30%-40% of portland cement, 20%-30% of aggregates, 5%-10% of polymer modifier, 1%-2% of water reducer, and the balance is water.

[0048] The present invention also provides a method for preparing the above-mentioned transportation road material, comprising the following steps:

[0049] 1) Raw material pretreatment: Mix the mineral powder and aggregate, and screen out the mixed raw materials with a preset particle size;

[0050] 2) Dry mixing: Dry mix the pretreated mineral powder, aggregate, portland cement, polymer modifier, and water reducer to obtain a dry mix;

[0051] 3) Pulp preparation: Add water to the dry mix and mix to obtain a slurry;

[0052] 4) Laying and forming: Lay the slurry on the road surface base layer and compact it into shape;

[0053] 5) Curing: Cure the road surface after forming to obtain the transportation road material.

[0054] The present invention also provides a transportation road, comprising a road surface base layer and a transportation road material provided on the road surface base layer, and the transportation road material is prepared by the above-mentioned preparation method.

[0055] The high-strength impact-resistant transportation road material provided by the present invention is mainly used for laying the transportation roads in open-pit coal mines, and can also be widely applied to the road construction in industrial parks, high-load traffic roads, and other special environments. Compared with traditional materials, the advantages of the materials of the present invention are as follows:

[0056] 1. High strength and impact resistance: By adding portland cement and aggregate, the present invention enhances the compressive strength and impact resistance of the material, and can effectively cope with the frequent impacts of heavy-duty transportation vehicles in mining areas.

[0057] 2. Excellent wear resistance: The combination of aggregate and polymer modifier enables the road surface material to have strong wear resistance, extends the service life of the road, and reduces the maintenance cost.

[0058] 3. Short construction period: The present invention adopts an optimized formula and construction process, which can significantly shorten the construction period and has good construction adaptability.

[0059] 4. Economical and environmentally friendly: The present invention uses a large amount of industrial by-products such as fly ash and slag powder, reduces the consumption of cement, lowers the material cost, and at the same time reduces resource waste and ecological pollution.

[0060] Example 2

[0061] This example provides a transportation road material, comprising the following raw materials in weight percentages: 20%-30% of mineral powder, 30%-40% of portland cement, 20%-30% of wear-resistant aggregate, 5%-10% of polymer modifier, 1%-2% of water reducer, and the balance is water.

[0062] Specifically, the mineral powder in this embodiment is active mineral powder, the portland cement is high-strength portland cement, and the aggregate is wear-resistant aggregate.

[0063] The above components act synergistically to generate a high-density silicate and aluminate network structure, forming a dense road surface structure layer, significantly enhancing the impact resistance and wear resistance.

[0064] The materials in the present invention can significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of the materials through scientific formulation design, meeting the use requirements of high load, high impact and harsh climate conditions of mining area transportation roads. The materials generate a dense gel structure and a consolidation layer, forming good impact resistance, wear resistance and freeze-thaw resistance characteristics. The mining area roads paved with this material can effectively extend the service life, reduce the maintenance cost and improve the transportation efficiency. Through the optimized formulation and construction process, the present invention also has a short construction period and low material cost, with good economic and environmental protection. By using industrial by-products such as fly ash and slag powder to replace part of the cement, the present invention reduces carbon dioxide emissions, meeting the requirements of green development. This material is widely used in the construction of heavy-duty transportation roads such as mining area transportation roads, industrial parks, port terminals, etc.

[0065] Preferably, the mineral powder is slag powder or fly ash.

[0066] Preferably, the mineral powder has a pozzolanic activity with a specific surface area greater than 400 m 2 / kg.

[0067] Preferably, the portland cement is a cement with a grade not lower than 42.5.

[0068] Preferably, the aggregate is quartz sand and / or basalt gravel.

[0069] Preferably, the particle size of the aggregate is less than 200 mesh.

[0070] Preferably, the polymer modifier is polyvinyl alcohol and / or polyacrylamide.

[0071] Preferably, the water reducer is a polycarboxylate water reducer.

[0072] Preferably, the water reducer is KJ-B type polycarboxylate anti-sludge high-performance water reducer and SPC-100 type polycarboxylate water reducer.

[0073] The functions of the raw materials are as follows:

[0074] 1. Mineral powder: The mineral powder is made of slag powder or fly ash, with a specific surface area greater than 400 m 2 / kg, it has strong pozzolanic activity, can react with cement to form a dense gel layer, improving the compressive strength and durability. At the same time, the mineral powder has good freeze-thaw resistance and can effectively prevent cracks caused by freeze-thaw cycles.

[0075] 2. Portland cement: As the main binder, Portland cement provides good early strength and enhances the curing performance. It can effectively improve the compressive strength of the material and ensure that there is no serious deformation under heavy load transportation conditions.

[0076] 3. Aggregate: Selecting materials such as high-hardness quartz sand and basalt gravel can effectively enhance the wear resistance and impact resistance of the road surface. The hardness and particle size of the aggregate have a direct impact on the wear resistance of the road surface, ensuring that the mining area transportation road can withstand long-term heavy load rolling.

[0077] 4. Polymer modifier: Polymer modifiers such as polyvinyl alcohol and polyacrylamide enhance the flexibility and crack resistance of the material through molecular cross-linking. The polymer modifier can effectively improve the toughness of the material, enabling it to withstand greater impact forces and avoid crack generation at the same time.

[0078] 5. Water reducer: Using polycarboxylate water reducer can optimize the water consumption of cement, enhance the fluidity of the mixture, and reduce the risk of dry shrinkage cracking at the same time. The use of water reducer helps to improve construction efficiency and makes the overall density of the road surface material higher.

[0079] The present invention also provides a method for preparing the above-mentioned transportation road material, including the following steps:

[0080] 1) Raw material pretreatment: Mix the mineral powder and aggregate, and screen out the mixed raw materials with a preset particle size;

[0081] 2) Dry mixing: Dry mix the pretreated mineral powder, aggregate, Portland cement, polymer modifier, and water reducer to obtain a dry mix;

[0082] 3) Pulp making: Add water to the dry mix and mix to obtain a slurry;

[0083] 4) Laying and shaping: Lay the slurry on the road surface base layer and compact it into shape;

[0084] 5) Curing: Cure after the road surface is formed to obtain the transportation road material.

[0085] Preferably, the preset particle size of the mixed raw materials in step 1) is less than 200 mesh.

[0086] Preferably, the dry mixing time in step 2) is 3 - 5 minutes,

[0087] and the mixing time in step 3) is 5 - 8 minutes.

[0088] Preferably, the laying thickness of the compacted and formed layer in step 4) is 8 - 15 cm.

[0089] Preferably, the curing time in step 5) is 3 - 5 days.

[0090] The present invention also provides a transportation road, including a road surface base layer and transportation road materials disposed on the road surface base layer, and the transportation road materials are prepared by the above preparation method.

[0091] Specifically, in this example, an ordinary mining area road is paved.

[0092] In an ordinary mining area road, the road surface needs to withstand the frequent passage of heavy transportation vehicles. The compressive strength, wear resistance, and construction efficiency of the materials are the key factors determining the road performance. Specifically, the transportation road materials in this embodiment include raw materials in the following weight percentages: 25% active mineral powder, 35% high-strength Portland cement, 30% wear-resistant aggregate, 7% polymer modifier, 1.5% water reducer, and the balance is water.

[0093] Specifically, the mineral powder in this embodiment is slag micro-powder.

[0094] Specifically, the aggregate in this embodiment is quartz sand and basalt gravel (weight ratio 1:1).

[0095] Specifically, the polymer modifier in this embodiment is polyvinyl alcohol.

[0096] Specifically, the water reducer in this embodiment is KJ-B type polycarboxylate anti-sludge high-performance water reducer.

[0097] Specifically, the present invention also provides a preparation method for the high-strength impact-resistant material of the above transportation road, including the following steps:

[0098] (1) Raw material pretreatment: Mix the active mineral powder and the wear-resistant aggregate in proportion, and screen out the mixed raw materials with a particle size less than 200 mesh to ensure the uniform distribution of particles and the uniformity of the mixture;

[0099] (2) Dry mixing and stirring: Add the pretreated active mineral powder, wear-resistant aggregate, high-strength Portland cement, polymer modifier, and water reducer into a mixer in proportion for dry mixing and stirring. Stir for 3 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix;

[0100] (3) Wet stirring and pulping: Gradually add an appropriate amount of water to the dry mix, and perform wet stirring until a slurry with good fluidity is formed. The wet stirring time of the slurry is 8 minutes, and stir until the slurry has good fluidity;

[0101] (4) Laying and forming: Uniformly lay the slurry on the treated road base. During the laying process, use a vibrating compaction device to compact and form it to ensure uniform and dense laying, and adjust the laying thickness to 12 cm;

[0102] (5) Quick curing: After the road surface is formed, carry out quick curing. The curing time is 3 days, and spray water appropriately according to weather conditions to keep it moist. During the curing period, spray water appropriately to keep it moist to prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0103] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, and significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of roads.

[0104] Lay a transportation road with high-strength impact-resistant materials. The road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transportation.

[0105] The application effect of the materials of the present invention in this mining area is as follows:

[0106] Test methods and results: Adopt standard compressive strength tests and wear resistance tests. The results show that after 28 days of standard curing, the compressive strength of this material is 60 MPa, which is significantly higher than that of traditional asphalt concrete and ordinary cement concrete, and can effectively withstand the heavy impact of mining area transport vehicles. In the wear resistance test, the wear amount of the material is 8.5 g, and the surface maintains good flatness and durability. The construction period of this material is short, it can be quickly put into use, and greatly improves the efficiency of mining area road construction.

[0107] Specifically, in this embodiment:

[0108] 1. Compressive strength test

[0109] Test standard: According to "Standard Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0110] Test method: Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%), carry out compressive testing after 28 days of standard curing period, the loading rate is 0.5 MPa / s, record the failure load, and calculate the compressive strength.

[0111] 2. Wear resistance test

[0112] Test standard: According to "Test Method for Abrasion Resistance of Concrete and Its Products (Ball Bearing Method)" (GB / T 16925-1997).

[0113] Test method: Use a ball bearing type wear-resistant testing machine (NS-2 type) to conduct tests under standard environmental conditions. Record the initial groove depth after pre-grinding for 30 revolutions; measure the depth every 1000 revolutions, and stop when the total number of revolutions reaches 5000 or the groove depth exceeds the limit, and record the wear amount.

[0114] This material exhibits high strength, excellent wear resistance, and a short construction period, and is very suitable for the paving of ordinary transportation roads in mining areas.

[0115] The material in this embodiment not only has excellent impact resistance, wear resistance, and weather resistance, but also has a convenient construction process, a short maintenance period, and good economic and environmental protection. Specifically, the high-strength impact-resistant material of the present invention is composed of active mineral powder, high-strength portland cement, wear-resistant aggregate, polymer modifier, water reducer, and an appropriate amount of water. Through reasonable proportioning and process flow, this material can effectively improve the service life of transportation roads in mining areas and reduce the economic burden caused by frequent repairs.

[0116] The high-strength impact-resistant transportation road material provided by the present invention is mainly used for the paving of transportation roads in open-pit coal mines, and can also be widely applied to the road construction in industrial parks, high-load traffic roads, heavy-load traffic roads, and other special environments. Compared with traditional materials, the advantages of the materials of the present invention are as follows:

[0117] 1. Enhance road bearing capacity: Through the synergistic effect of wear-resistant aggregate and high-strength portland cement, significantly improve the compressive strength and impact resistance of the road surface, and effectively cope with the impact of heavy-duty transport vehicles in mining areas.

[0118] 2. Excellent wear resistance: The surface layer of the material is synergistically enhanced by high-hardness aggregate and polymer network structure, improving the wear resistance and significantly extending the service life of the road.

[0119] 3. Short construction period: The optimized formula and rapid curing process can significantly shorten the construction period, reduce the road closure time, and improve the construction efficiency.

[0120] 4. Green and environmental protection: A large amount of industrial by-products such as fly ash and slag powder are used to replace cement, reducing resource consumption and CO2 emissions.

[0121] Example 3

[0122] Specifically, in this example, the paving of roads in extremely harsh mining areas is carried out.

[0123] In a mining area in a high-cold region, the average annual temperature is below -20°C. Affected by freeze-thaw cycles and low temperatures, traditional road materials are prone to cracks and damage. Specifically, the transportation road materials in this embodiment include raw materials with the following weight percentages: 20% active mineral powder, 40% high-strength portland cement, 25% wear-resistant aggregate, 10% polymer modifier, 2% water reducer, and the balance is water.

[0124] Specifically, the mineral powder in this embodiment is fly ash.

[0125] Specifically, the aggregate in this embodiment is quartz sand.

[0126] Specifically, the polymer modifier in this embodiment is polyacrylamide.

[0127] Specifically, the water reducer in this embodiment is SPC-100 type polycarboxylate water reducer.

[0128] Specifically, the present invention also provides a method for preparing the above-mentioned high-strength impact-resistant material for transportation roads, including the following steps:

[0129] (1) Raw material pretreatment: Mix the active mineral powder and the wear-resistant aggregate in proportion, and screen out the mixed raw materials with a particle size less than 200 mesh to ensure the uniform distribution of particles and the uniformity of the mixture;

[0130] (2) Dry mixing and stirring: Add the pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer to the mixer in proportion for dry mixing and stirring. Stir for 4 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix;

[0131] (3) Wet stirring and pulping: Gradually add an appropriate amount of water to the dry mix and wet stir until a slurry with good fluidity is formed. The wet stirring time of the slurry is 6 minutes until the slurry has good fluidity;

[0132] (4) Laying and forming: Uniformly lay the slurry on the treated road surface base layer, and use a vibration compaction device for compaction and forming during the laying process to ensure uniform and dense laying, and adjust the laying thickness to 8 cm;

[0133] (5) Rapid curing: After the road surface is formed, carry out rapid curing. The curing time is 4 days, and spray water appropriately according to weather conditions to keep it moist. Spray water appropriately during the curing period to keep it moist and prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0134] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in the mining area, and significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of the road.

[0135] A high-strength impact-resistant material is used to pave the transportation road. The road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-load transportation.

[0136] The application effect of the material of the present invention in this environment is as follows:

[0137] Test methods and results: Freeze-thaw cycle test, compressive strength test, and impact resistance test were adopted. The results show that after 50 freeze-thaw cycles, the compressive strength retention rate of the material reached more than 85%, which is significantly better than traditional asphalt concrete and ordinary cement concrete, and can effectively withstand climate changes in extreme environments. In the impact test, there were no obvious cracks or spalling on the surface of the material, and its impact resistance was significantly better than that of traditional materials, and it could adapt to high-frequency traffic impacts. In addition, after multiple freeze-thaw cycles, the surface of the material remained intact, without cracks and damage, demonstrating strong weather resistance and freeze-thaw resistance.

[0138] Specifically, in this embodiment:

[0139] 1. Freeze-thaw resistance test

[0140] According to "Standard for Test Methods of Long-Term Performance and Durability of Concrete (GB / T 50082 - 2024)".

[0141] Specimen preparation: Prismatic specimens with standard dimensions of 100mm×100mm×400mm were used. After 28 days of standard curing, water immersion and freeze-thaw cycle tests were carried out.

[0142] Process of water immersion and freeze-thaw cycle:

[0143] Water immersion: The specimens were immersed in normal-temperature water for 96 hours to ensure that the materials were completely saturated with water.

[0144] Freeze-thaw cycle: The specimens were placed in a KDR-10 type concrete rapid freeze-thaw testing machine for freeze-thaw cycles.

[0145] 2. Compressive strength test:

[0146] Test standard: According to "Standard for Test Methods of Physical and Mechanical Properties of Concrete (GB / T 50081 - 2019)".

[0147] Test equipment: A YAW-3000D type pressure testing machine (maximum loading force 3000kN, measurement accuracy ±1%) was used for compressive strength testing. The loading rate was 0.5MPa / s, and the failure load was recorded and the compressive strength was calculated.

[0148] 3. Impact resistance test:

[0149] Method: Drop hammer impact test.

[0150] Equipment: A drop hammer impact testing machine (Model ZBC-1251) was used to conduct the impact resistance test, and the damage conditions of the material were recorded.

[0151] This material performs excellently in extremely cold environments, can effectively avoid damage caused by freeze-thaw, and is especially suitable for transportation roads in mining areas and cold regions.

[0152] Example 4

[0153] Specifically, in this example, the laying of roads in extremely high-temperature mining areas was carried out.

[0154] In a certain extremely high-temperature mining area, the average annual temperature is as high as over 40 °C, and the surface temperature can exceed 50 °C. The transportation roads in this mining area have long been under the pressure of high temperature, and traditional materials often crack, deform, and harden in such an environment. Therefore, the application effect of the material of the present invention in this environment is crucial. Specifically, the transportation road material in this example includes the following raw materials by weight percentage: 23% active mineral powder, 37% high-strength portland cement, 25% wear-resistant aggregate (high-hardness quartz sand is selected), 8% polymer modifier, 1% water reducer, and the balance is water.

[0155] Specifically, the mineral powder in this example is slag powder.

[0156] Specifically, the aggregate in this example is quartz sand.

[0157] Specifically, the polymer modifier in this example is polyvinyl alcohol and polyacrylamide (weight ratio 1:4).

[0158] Specifically, the water reducer in this example is KJ-B type polycarboxylate anti-sludge high-performance water reducer.

[0159] Specifically, the present invention also provides a method for preparing the above-mentioned high-strength impact-resistant material for transportation roads, including the following steps:

[0160] (1) Pretreatment of raw materials: The active mineral powder and wear-resistant aggregate are mixed in proportion, and the mixed raw materials with a particle size less than 200 mesh are screened out to ensure the uniform distribution of particles and the uniformity of the mixture;

[0161] (2) Dry mixing and stirring: The pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer are added to the mixer in proportion for dry mixing and stirring. The dry mixing and stirring are carried out for 5 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix;

[0162] (3) Wet stirring and pulping: An appropriate amount of water is gradually added to the dry mix, and wet stirring is carried out until a slurry with good fluidity is formed. The wet stirring time of the slurry is 5 minutes, and stirring is carried out until the slurry has good fluidity;

[0163] (4) Paving and forming: Uniformly pave the slurry on the treated road base. During the paving process, use a vibration compaction device for compaction and forming to ensure uniform and dense paving, and adjust the paving thickness to 15 cm;

[0164] (5) Rapid curing: After the road surface is formed, conduct rapid curing for 5 days, and appropriately spray water to keep it moist according to weather conditions. During the curing period, appropriately spray water to keep it moist to prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0165] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, and significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of roads.

[0166] Laying a transportation road with high-strength impact-resistant materials, the road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transportation.

[0167] Test methods and results: Adopt standard compressive strength tests and thermal expansion coefficient tests. The tests show that after 24 hours of high-temperature baking (50 °C), the compressive strength of this material remains above 55 MPa, and the thermal expansion coefficient is much lower than that of traditional cement concrete materials, showing good high-temperature adaptability. At the same time, the wear resistance of the material still maintains a high level under high-temperature conditions, with low surface wear, significantly superior to conventional materials. The thermal expansion coefficient of the material in this invention is 8.2×10 -6 / °C, significantly lower than the thermal expansion coefficient of traditional cement concrete materials (generally 12×10 -6 / °C).

[0168] Specifically, in this embodiment:

[0169] 1. Compressive strength test

[0170] Test standard: According to "Standard Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0171] Test equipment: Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%) for compressive strength testing. The loading rate is 0.5 MPa / s, record the failure load and calculate the compressive strength.

[0172] 2. Thermal expansion coefficient test

[0173] 1. Test standard

[0174] According to "Test Regulations for Cement and Cement Concrete in Highway Engineering" (JTG 3420-2020).

[0175] 3. Test method

[0176] Specimen preparation: Prismatic specimens with dimensions of 100 mm × 100 mm × 400 mm are taken and subjected to a high-temperature baking treatment at 50 °C for 24 hours.

[0177] Testing equipment: An XPD-06S type optical lever method measuring instrument is used.

[0178] Testing process: The specimens are placed in the XPD-06S type optical lever method measuring instrument, and the linear expansion changes of the specimens under different temperature conditions are recorded. The coefficient of thermal expansion of the material is calculated based on the experimental results.

[0179] Example 5

[0180] Specifically, in this example, a road is paved in a high-humidity mining area.

[0181] In a certain high-humidity mining area, the annual precipitation is relatively large, and the groundwater level is relatively high, so the road surface often accumulates water. In this environment, traditional cement-based materials are prone to freeze-thaw damage and surface aging, while the materials of the present invention can maintain their strength and durability in a humid environment through optimized formulation design. Specifically, the transportation road materials in this example include the following raw materials by weight percentage: 28% of active mineral powder, 32% of high-strength portland cement, 25% of wear-resistant aggregate (high-quality basalt is selected), 10% of polymer modifier, 1.5% of water reducer, and the balance is water.

[0182] Specifically, the mineral powder in this example is fly ash.

[0183] Specifically, the aggregate in this example is high-quality basalt.

[0184] Specifically, the polymer modifier in this example is polyvinyl alcohol.

[0185] Specifically, the water reducer in this example is an SPC-100 type polycarboxylate water reducer.

[0186] Specifically, the present invention also provides a method for preparing the above-mentioned high-strength impact-resistant transportation road material, including the following steps:

[0187] (1) Raw material pretreatment: The active mineral powder and the wear-resistant aggregate are mixed in proportion, and the mixed raw materials with a particle size less than 200 mesh are screened out to ensure the uniform distribution of particles and the uniformity of the mixture;

[0188] (2) Dry mixing and stirring: The pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer are added to the mixer in proportion and subjected to dry mixing and stirring for 4 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix;

[0189] (3) Wet mixing for pulping: Gradually add an appropriate amount of water to the dry mixture and wet mix until a slurry with good fluidity is formed. The wet mixing time of the slurry is 7 minutes, and mix until the slurry has good fluidity;

[0190] (4) Laying and forming: Uniformly lay the slurry on the treated road base. During the laying process, use a vibration compaction device to compact and form it to ensure uniform and dense laying, and adjust the laying thickness to 10 cm;

[0191] (5) Rapid curing: After the road surface is formed, carry out rapid curing. The curing time is 4 days, and spray water appropriately according to weather conditions to keep it moist. During the curing period, spray water appropriately to keep it moist to prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0192] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, significantly improving the compressive strength, impact resistance, abrasion resistance and weather resistance of the road.

[0193] Laying a transport road with high-strength impact-resistant materials, the road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transport.

[0194] Test methods and results: Conduct 50 times of water immersion and freeze-thaw cycle tests. The results show that the compressive strength of the material remains above 50 MPa, and the freeze-thaw resistance performance is significantly better than that of traditional cement concrete. There are no obvious cracks or spalling on the surface of the material, and it can long-term adapt to the transport pressure in a humid environment. Surface cracks and spalling: There are no obvious cracks or spalling on the surface of the material during the freeze-thaw cycle. The crack depth is less than 0.3 mm, and the crack area is 0.1 cm², showing good freeze-thaw resistance.

[0195] Comparison of freeze-thaw resistance performance: Compared with traditional cement concrete (after 50 freeze-thaw cycles, the crack area is 2.5 cm² and the maximum crack depth is 1.5 mm), the crack resistance of the material of the present invention is significantly better than that of traditional cement concrete

[0196] Specifically, in this embodiment:

[0197] 1. Freeze-thaw resistance test

[0198] According to the "Standard for Test Methods of Long-Term Performance and Durability of Concrete GB / T 50082-2024".

[0199] Specimen preparation: Use standard prismatic specimens of 100 mm × 100 mm × 400 mm. After 28 days of standard curing, conduct water immersion and freeze-thaw cycle tests.

[0200] Process of water immersion and freeze-thaw cycle:

[0201] Water immersion: Immerse the specimen in normal temperature water for 96 hours to ensure that the material is completely saturated with water.

[0202] Freeze-thaw cycles: Place the specimen in a KDR-10 type concrete rapid freeze-thaw testing machine for freeze-thaw cycles.

[0203] 2. Compressive strength test:

[0204] According to the "Standard Test Method for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0205] Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%) to conduct the compressive strength test. The loading rate is 0.5 MPa / s. Record the failure load and calculate the compressive strength retention rate.

[0206] Surface crack and spalling inspection: Use visual inspection method and a PL-200 type ultrasonic concrete tester to evaluate the crack depth, quantity and crack distribution.

[0207] Example 6

[0208] Specifically, in this example, high-load mining area road paving is carried out.

[0209] In a certain mining area, the load of transport vehicles often exceeds 100 tons, and the road surface bears great impact force and pressure. Traditional cement concrete often shows cracks or damage due to insufficient strength. The high strength and impact resistance of the materials of the present invention have been fully verified in this environment. Specifically, the transport road materials in this embodiment include the following raw materials by weight percentage: 25% active mineral powder, 35% high-strength portland cement, 30% wear-resistant aggregate, 8% polymer modifier, 2% water reducing agent, and the balance is water.

[0210] Specifically, the mineral powder in this embodiment is slag powder.

[0211] Specifically, the aggregate in this embodiment is quartz sand and basalt gravel (weight ratio 2:1).

[0212] Specifically, the polymer modifier in this embodiment is a KJ-B type polycarboxylate-based anti-sludge high-performance water reducing agent.

[0213] Specifically, the water reducing agent in this embodiment is a polycarboxylate-based water reducing agent.

[0214] Specifically, the present invention also provides a preparation method for the above-mentioned high-strength impact-resistant materials for transport roads, including the following steps:

[0215] (1) Raw material pretreatment: Mix the active mineral powder and wear-resistant aggregate in proportion, and screen out the mixed raw material with a particle size less than 200 mesh to ensure the uniform distribution of particles and the uniformity of the mixture.

[0216] (2) Dry mixing and stirring: Add the pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer into the mixer in proportion for dry mixing and stirring. Stir for 5 minutes to ensure that all components are evenly mixed to form a uniform mixture, and the mixture is a dry mix.

[0217] (3) Wet stirring and pulping: Gradually add an appropriate amount of water to the dry mix and wet stir until a slurry with good fluidity is formed. The wet stirring time of the slurry is 5 minutes until the slurry has good fluidity.

[0218] (4) Laying and shaping: Uniformly lay the slurry on the treated road surface base layer. During the laying process, use a vibration compaction device for compaction and shaping to ensure uniform and dense laying, and adjust the laying thickness to 8 cm.

[0219] (5) Rapid curing: After the road surface is formed, carry out rapid curing. The curing time is 3 days, and spray water appropriately according to weather conditions to keep it moist. Spray water appropriately during the curing period to keep it moist and prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0220] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, significantly improving the compressive strength, impact resistance, wear resistance and weather resistance of the road.

[0221] Lay a transport road with high-strength impact-resistant materials. The road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transport.

[0222] Test method and results: After the road surface is laid, through long-term heavy truck rolling tests, both the compressive strength and impact resistance perform excellently. The test result of the compressive strength is 65 MPa. After the impact resistance test, there are no obvious cracks, the overall surface is smooth, and there are no obvious indentations or settlements, showing good durability.

[0223] Specifically, in this embodiment:

[0224] 1. Heavy truck rolling test

[0225] Test method

[0226] Rolling process: Use a heavy truck (total truck weight ≥ 200 tons) to conduct a rolling test on the laid road surface. During the test, the truck tires need to repeatedly roll over the specimen to simulate the load conditions in actual road use. The rolling speed is set at 5 km / h and continuously rolled 1000 times to simulate the road surface performance after long-term use.

[0227] Rolling instrument: Use a heavy truck as a rolling tool.

[0228] 2. Compressive strength test

[0229] Test standard: According to the "Standard for Test Methods of Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0230] Test equipment: Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%) to conduct the compressive strength test. The loading rate is 0.5 MPa / s, record the failure load and calculate the compressive strength.

[0231] 3. Impact resistance test:

[0232] Method: Drop hammer impact test

[0233] Equipment: Use a drop hammer impact testing machine (ZBC-1251 type) to conduct the impact resistance test and record the damage condition of the material.

[0234] Example 7

[0235] Specifically, in this example, a frost-thaw cycle mining road is paved.

[0236] In a mining area in a cold region, the winter temperature usually drops below -20°C, and frequent frost-thaw cycles occur. Traditional concrete materials are prone to frost heaving and cracking in such an environment. After special formula adjustment, the materials of the present invention have better frost-thaw resistance in low-temperature environments. Specifically, the transportation road materials in this example include the following raw materials by weight percentage: 22% active mineral powder, 38% high-strength portland cement, 25% wear-resistant aggregate, 8% polymer modifier, 2% water reducer, and the balance is water.

[0237] Specifically, the mineral powder in this example is fly ash.

[0238] Specifically, the aggregate in this example is quartz sand.

[0239] Specifically, the polymer modifier in this example is polyvinyl alcohol and polyacrylamide (weight ratio 2:1).

[0240] Specifically, the water reducer in this example is a polycarboxylate-based water reducer.

[0241] Specifically, the present invention also provides a method for preparing the above-mentioned high-strength impact-resistant transportation road material, including the following steps:

[0242] (1) Raw material pretreatment: Mix the active mineral powder and wear-resistant aggregate in proportion, and screen out the mixed raw materials with a particle size less than 200 mesh to ensure the uniform distribution of particles and the uniformity of the mixture.

[0243] (2) Dry mixing and stirring: Add the pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer into the mixer in proportion for dry mixing and stirring. Stir for 3 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix.

[0244] (3) Wet stirring and pulping: Gradually add an appropriate amount of water to the dry mix and wet stir until a slurry with good fluidity is formed. The wet stirring time of the slurry is 8 minutes, and stir until the slurry has good fluidity.

[0245] (4) Laying and forming: Uniformly lay the slurry on the treated road surface base layer, and use a vibration compaction device for compaction and forming during the laying process to ensure uniform and dense laying, and adjust the laying thickness to 15 cm.

[0246] (5) Quick curing: After the road surface is formed, carry out quick curing for 5 days, and appropriately spray water to keep it moist according to weather conditions. Keep it moist by appropriately spraying water during the curing period to prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0247] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, and significantly improve the compressive strength, impact resistance, wear resistance and weather resistance of the road.

[0248] Laying a transport road with high-strength impact-resistant materials, the road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transport.

[0249] Test methods and results: After 50 freeze-thaw cycles, the compressive strength retention rate of the material reaches more than 90%, and the crack resistance is significantly better than that of traditional cement concrete. No freeze-thaw damage appears on the material surface, showing excellent freeze-thaw adaptability, and it is suitable for laying mining area roads in extremely cold regions. Specific crack resistance values: After 50 freeze-thaw cycles, no obvious cracks or spalling phenomena appear on the surface of the specimen, the maximum depth of the cracks on the material surface is 0.5 mm, and the crack area is 0.2 cm², indicating that the material has good crack resistance.

[0250] Compared with traditional cement concrete (the crack area is 2.5 cm² after 50 freeze-thaw cycles

[0251] , and the maximum crack depth is 1.5 mm), the crack resistance of the material of the present invention is significantly better than that of traditional cement concrete.

[0252] Specifically, in this embodiment:

[0253] Freeze-thaw cycle test, the specific method is as follows:

[0254] Test standard: According to "Standard Test Methods for Long-Term Performance and Durability of Concrete - GB / T 50082-2024".

[0255] Test equipment: Adopt KDR-10 type rapid concrete freeze-thaw testing machine.

[0256] Compressive strength test:

[0257] Test standard: According to "Standard Test Methods for Physical and Mechanical Properties of Concrete - GB / T 50081-2019".

[0258] Instrument model: Use YAW-3000D type pressure testing machine (maximum loading force 3000kN, measurement accuracy ±1%) for compressive strength test, loading rate is 0.5MPa / s, record the failure load, and calculate the compressive strength retention rate.

[0259] Crack resistance detection:

[0260] Observe the surface of the specimen after freeze-thaw cycles, evaluate its crack condition, and use PL-200 type ultrasonic concrete tester to conduct non-destructive testing on the cracks and damage of the specimen to ensure that there is no obvious damage to the surface structure after freeze-thaw.

[0261] Example 8

[0262] Specifically, in this example, the transportation road of open-pit coal mine is paved.

[0263] On a common mining area road, the road surface needs to bear the frequent passage of heavy transport vehicles. The compressive strength, wear resistance and construction efficiency of the material are the key factors determining the road performance. Specifically, the transportation road material in this example includes the following raw materials by weight percentage: 30% active mineral powder, 30% high-strength portland cement, 20% wear-resistant aggregate, 5% polymer modifier, 1% water reducer, and the balance is water.

[0264] Specifically, the mineral powder in this example is slag powder.

[0265] Specifically, the aggregate in this example is quartz sand.

[0266] Specifically, the polymer modifier in this example is polyacrylamide.

[0267] Specifically, the water reducer in this example is polycarboxylate water reducer.

[0268] Specifically, the present invention also provides a preparation method of the above-mentioned high-strength impact-resistant material for transportation roads, including the following steps:

[0269] (1) Raw material pretreatment: Mix the active mineral powder and wear-resistant aggregate in proportion, and screen out the mixed raw materials with a particle size less than 200 mesh to ensure the uniform distribution of particles and the uniformity of the mixture.

[0270] (2) Dry mixing and stirring: Add the pretreated active mineral powder, wear-resistant aggregate, high-strength portland cement, polymer modifier, and water reducer into the mixer in proportion for dry mixing and stirring. Stir for 4 minutes to ensure that all components are uniformly mixed to form a uniform mixture, and the mixture is a dry mix.

[0271] (3) Wet stirring and pulping: Gradually add an appropriate amount of water to the dry mix and wet stir until a slurry with good fluidity is formed. The wet stirring time of the slurry is 6 minutes until the slurry has good fluidity.

[0272] (4) Laying and forming: Uniformly lay the slurry on the treated road surface base layer. During the laying process, use a vibration compaction device for compaction and forming to ensure uniform and dense laying, and adjust the laying thickness to 11 cm.

[0273] (5) Quick curing: After the road surface is formed, carry out quick curing for 3 days, and appropriately spray water to keep it moist according to weather conditions. Keep it moist by appropriately spraying water during the curing period to prevent the surface of the material from cracking, so as to improve the compressive strength and impact resistance.

[0274] The above materials can withstand the high impact, high wear and extreme climate conditions of heavy-duty transport vehicles in mining areas, significantly improving the compressive strength, impact resistance, wear resistance and weather resistance of roads.

[0275] Laying a transport road with high-strength impact-resistant materials, the road has a long service life, reduces maintenance costs, and can withstand high-frequency heavy-duty transport.

[0276] Test methods and results: Adopt standard compressive strength tests and wear resistance tests. The results show that after 28 days of standard curing, the compressive strength of this material is 58 MPa, significantly higher than that of traditional asphalt concrete and ordinary cement concrete, and can effectively withstand the heavy-duty impact of mining area transport vehicles. The wear amount of this material in the wear resistance test is 10.0 g, and the surface maintains good flatness and durability. The construction period of this material is short, it can be quickly put into use, and greatly improves the efficiency of mining area road construction.

[0277] This material exhibits high strength, excellent wear resistance and a short construction period, and is very suitable for laying ordinary transport roads in mining areas.

[0278] Specifically, in this embodiment:

[0279] 1. Compressive strength test

[0280] Test standard: According to the "Standard Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0281] Test method: Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%), conduct compressive strength testing after 28 days of standard curing, with a loading rate of 0.5 MPa / s, record the failure load, and calculate the compressive strength.

[0282] 2. Abrasion resistance test

[0283] Test standard: According to the "Test Method for Abrasion Resistance of Concrete and Its Products (Ball Bearing Method)" (GB / T 16925-1997).

[0284] Test method: Use a ball bearing type abrasion resistance testing machine (NS-2 type), conduct tests under standard conditions, record the initial groove depth after pre-grinding 30 revolutions; measure the depth every 1000 revolutions, and stop when the total number of revolutions reaches 5000 revolutions or the groove depth exceeds the limit. Record the wear amount.

[0285] Comparative experiment

[0286] To verify the superiority of the materials of the present invention, the present invention has carried out detailed comparisons with different types of traditional materials through multiple tests. The comparative experiments mainly focus on aspects such as compressive strength, impact resistance, abrasion resistance, weather resistance, freeze-thaw resistance, and construction efficiency. The following several comparative materials are selected for the experiments:

[0287] Traditional asphalt concrete: As a commonly used material for mining area roads, asphalt concrete performs well in high-temperature environments, but is relatively fragile in cold and humid environments, and has limited compressive strength and abrasion resistance.

[0288] Ordinary cement concrete: Commonly used in building and road engineering, it has good compressive properties, but poor impact resistance and abrasion resistance, and weak adaptability to environmental changes.

[0289] High-strength cement concrete: Usually used for roads requiring higher strength. Although its compressive strength is strong, its impact resistance and freeze-thaw resistance are lacking.

[0290] The following is a detailed experimental comparison between the present invention and the above comparative materials:

[0291] 1. Compressive strength comparison

[0292] Experimental method: Use a standard compressive test to compare the compressive strengths of different materials under standard curing conditions. All materials have undergone 28 days of standard curing.

[0293] Specifically, in this comparative experiment:

[0294] 1. Compressive strength test

[0295] Test standard: According to the "Standard Test Methods for Physical and Mechanical Properties of Concrete" (GB / T 50081-2019).

[0296] Test method: Use a YAW-3000D type pressure testing machine (maximum loading force 3000 kN, measurement accuracy ±1%), conduct compressive strength testing after 28 days of standard curing, with a loading rate of 0.5 MPa / s, record the failure load, and calculate the compressive strength.

[0297] Experimental results:

[0298]

[0299]

[0300] It can be seen from the experimental results that the material of the present invention has the highest compressive strength, can withstand greater loads, and is suitable for the heavy-duty transportation requirements of mining area roads. While the compressive strength of asphalt concrete and ordinary cement concrete is significantly lower and cannot meet the high-load transportation conditions.

[0301] 2. Comparison of impact resistance

[0302] Experimental method: Use a heavy truck rolling test to compare the impact resistance of different materials.

[0303] Specifically, in this comparative experiment:

[0304] 1. Heavy truck rolling test

[0305] Test method

[0306] Rolling process: Use a heavy truck (total truck weight ≥ 200 tons) to conduct a rolling test on the paved road surface. During the test, the truck tires need to repeatedly roll over the specimen to simulate the load conditions in actual road use. The rolling speed is set at 5 km / h and continuous rolling is carried out 1000 times to simulate the road surface performance after long-term use.

[0307] Rolling instrument: Use a heavy truck as the rolling tool.

[0308] 2. Impact resistance test:

[0309] Method: Drop hammer impact test

[0310] Equipment: Use a drop hammer impact testing machine (ZBC-1251 type) to conduct impact resistance testing and record the failure conditions of the materials.

[0311] Experimental results:

[0312]

[0313]

[0314] The experimental results show that the material of the present invention exhibits the best impact resistance after being subjected to impact, with a smooth surface and no damage, and is suitable for heavy-duty traffic conditions in mining areas. In contrast, traditional asphalt concrete and ordinary cement concrete both show varying degrees of cracks and surface damage after impact. Although high-strength cement concrete is relatively strong, it still fails to achieve the impact resistance of the material of the present invention.

[0315] 3. Abrasion Resistance Comparison

[0316] Experimental method: A ball-bearing type abrasion testing machine was used to simulate the wear of road surface materials under traffic flow to test the wear resistance of different materials.

[0317] Specifically, in this comparative experiment:

[0318] 1. Abrasion Resistance Test

[0319] Test standard: According to "GB / T 16925-1997 Test Method for Abrasion Resistance of Concrete and Its Products (Ball Bearing Method)". Test method: A ball-bearing type abrasion testing machine (NS-2 type) was used to conduct the test under standard environmental conditions. After pre-grinding for 30 revolutions, the initial groove depth was recorded; the depth was measured every 1000 revolutions, and the test was stopped when the total number of revolutions reached 5000 revolutions or the groove depth exceeded the limit. The wear amount was recorded.

[0320] Experimental results:

[0321]

[0322] From the experimental results, the material of the present invention has the smallest wear amount, and the surface maintains good smoothness and durability. Traditional asphalt concrete and ordinary cement concrete show obvious surface damage after a long-term wear test, while high-strength cement concrete has less damage after wear, but still inferior to the material of the present invention.

[0323] 4. Weather Resistance Comparison

[0324] Experimental method: After the materials were treated at high temperature (50 °C), low temperature (-20 °C) and humid environment (100% humidity) for 30 days, the changes in their compressive strength were tested respectively.

[0325] Experimental results:

[0326]

[0327] The weather resistance of the materials of the present invention is the most excellent. Whether in high-temperature, low-temperature or humid environments, the compressive strength retention rate remains at a high level. The strength retention rates of traditional asphalt concrete and ordinary cement concrete are relatively low in low-temperature and humid environments, while high-strength cement concrete performs better in high-temperature and humid environments, but still cannot compare with the weather resistance of the materials of the present invention.

[0328] 5. Comparison of freeze-thaw resistance performance

[0329] Experimental method: The materials are subjected to freeze-thaw cycle tests to measure the compressive strength retention rate and crack conditions after 50 freeze-thaw cycles.

[0330] Specifically, in this comparative experiment:

[0331] The freeze-thaw cycle test is carried out as follows:

[0332] The test standard is based on the "Standard Test Method for Long-Term Performance and Durability of Concrete" (GB / T 50082-2024).

[0333] Test equipment: The KDR-10 type rapid concrete freeze-thaw testing machine is used.

[0334] Measuring indexes:

[0335] After the test, a YAW-3000D type pressure testing machine is used to test the compressive strength and determine the strength loss rate.

[0336] Experimental results:

[0337] Material Ratio of compressive strength retention Crack condition Material of Example 7 of the present invention 90％ No obvious cracks Traditional asphalt concrete 50％ Serious surface cracks and local spalling Ordinary cement concrete 60％ Surface cracks appear and local shedding High-strength cement concrete 80％ Slight cracks and slight surface spalling

[0338] The experimental results show that the materials of the present invention have the best freeze-thaw resistance performance, can maintain a high compressive strength in a severe cold environment, and no obvious cracks or damages appear. Traditional asphalt concrete performs poorly after freeze-thaw cycles, with obvious cracks and spalling. The performance of ordinary cement concrete is slightly better than that of asphalt concrete, but far inferior to the materials of the present invention.

[0339] 6. Comparison of construction efficiency

[0340] Experimental method: Compare the construction time and curing time of different materials to test their construction convenience.

[0341] Experimental results:

[0342] Material Construction time (days) Curing time (days) Material of Example 6 of the present invention 5 3 Traditional asphalt concrete 7 7 Ordinary cement concrete 6 14 High-strength cement concrete 7 10

[0343] In terms of construction time, the materials of the present invention are significantly superior to traditional asphalt concrete and cement concrete. They have a short construction period and a short curing time, and can be put into use quickly. This is crucial for the rapid construction of mine roads, while traditional materials have a longer construction period and require more curing time, which prolongs the road closure time.

[0344] Summary

[0345] Through the above detailed comparative experiments, it can be seen that the high-strength impact-resistant materials of the present invention are superior to traditional asphalt concrete, ordinary cement concrete, and high-strength cement concrete in terms of compressive strength, impact resistance, wear resistance, weather resistance, freeze-thaw resistance, and construction efficiency. The high strength, impact resistance, and durability of this material are particularly suitable for the construction of mine roads, industrial park roads, and other heavy-duty traffic roads, providing a more economical, environmentally friendly, and efficient solution for the transportation industry.

[0346] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered within the protection scope of the present invention.

Claims

1. A transportation road material, characterized in that, It comprises raw materials in the following weight percentages: 20%-30% of mineral powder, 30%-40% of portland cement, 20%-30% of aggregate, 5%-10% of polymer modifier, 1%-2% of water reducing agent, and the balance is water.

2. The transportation road material according to claim 1, characterized in that, The mineral powder is slag powder or fly ash.

3. The transportation road material according to claim 1, wherein, The mineral powder has a pozzolanic activity with a specific surface area greater than 400 m 2 / kg.

4. The transportation road material according to claim 1, wherein The portland cement is cement with a grade not lower than 42.

5.

5. The transportation road material according to claim 1, characterized in that The aggregate is quartz sand and / or basalt gravel.

6. The transportation road material according to claim 1, wherein The particle size of the aggregate is less than 200 mesh.

7. The transportation road material according to claim 1, characterized in that The polymer modifier is polyvinyl alcohol and / or polyacrylamide.

8. The transportation road material according to claim 1, wherein The water reducing agent is a polycarboxylate water reducing agent.

9. The method for preparing transportation road materials according to any one of claims 1 to 8, characterized in that It comprises the following steps: 1) Pretreatment of raw materials: Mix the mineral powder and the aggregate, and screen out the mixed raw materials with a preset particle size; 2) Dry mixing: Dry mix the pretreated mineral powder, aggregate, portland cement, polymer modifier, and water reducing agent to obtain a dry mix; 3) Pulp making: Add water to the dry mix and mix to obtain a slurry; 4) Laying and forming: Lay the slurry on the road base and compact it into shape; 5) Curing: Curing is carried out after the road surface is formed to obtain the transportation road material.

10. The method for preparing transportation road materials according to claim 9, characterized in that, In the step 1), the preset particle size of the mixed raw materials is less than 200 mesh.

11. The method for preparing transportation road materials according to claim 9, wherein The dry mixing time in the step 2) is 3-5 minutes, The mixing time in the step 3) is 5-8 minutes.

12. The method for preparing transportation road materials according to claim 9, wherein, The laying thickness of the compacted forming in the step 4) is 8-15 cm.

13. The method for preparing transportation road materials according to claim 9, wherein The curing time in the step 5) is 3-5 days.

14. A transportation road, characterized in that, It comprises a road base and a transportation road material provided on the road base, and the transportation road material is prepared by the preparation method described in any one of claims 9 to 13.

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