Impermeability reinforced bare concrete material and preparation method thereof
The anti-seepage additive reinforced plain concrete prepared by specific proportions and hydrothermal synthesis method solves the problem of penetration corrosion of plain concrete in coastal areas, improves the anti-seepage performance and mechanical properties, and extends the service life.
Patent Information
- Application Number
- CN202510651528.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-09-19
AI Technical Summary
In coastal areas, bare concrete is susceptible to penetration by harmful ions such as chloride ions and sulfate ions, which lead to corrosion and deterioration, affecting safety and durability, and increasing maintenance and repair costs.
Spherical nano-silica carriers are prepared by hydrothermal synthesis using cementitious materials, coarse aggregate, fine aggregate, fly ash, mineral powder, silica fume and anti-seepage additives in specific proportions. A hydrophobic network is formed on the surface of the carriers, which is reacted with trihydroxyethylamine to prepare an anti-seepage additive to enhance the anti-seepage performance and density of concrete.
It improves the impermeability and mechanical properties of plain concrete, extends its service life, and ensures the quality and safety of concrete.
Smart Images
Figure BDA0005411242560000111
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building materials, in particular to an anti-seepage reinforced plain concrete material and a preparation method thereof. Background Art
[0002] As a unique construction technique, bare concrete is not painted, tiled, or covered with stone after the concrete is poured, allowing the natural beauty of the concrete to be fully revealed. This construction method has significant characteristics and extremely stringent requirements for project quality. During its service life, bare concrete not only requires a beautiful and flawless surface, but also, because it withstands years of weather, rain, and chemical attack, it has higher standards for safety and durability than ordinary concrete.
[0003] Bare-faced concrete faces significant challenges, particularly in coastal areas. These areas are susceptible to the penetration of harmful ions such as chloride and sulfate ions, which can lead to corrosion and deterioration of the concrete. This poses a significant challenge to the long-term safety of bare-faced concrete structures. The penetration of harmful ions can damage the concrete's internal structure, reducing its strength and stability, and thus impacting the safety of the entire building. Furthermore, this poor durability significantly reduces the service life of bare-faced concrete in coastal areas, increasing maintenance and repair costs.
[0004] Therefore, the present invention provides an anti-seepage reinforced plain concrete material and a preparation method thereof to solve the above-mentioned technical problems. Summary of the Invention
[0005] The purpose of the present invention is to provide an anti-seepage reinforced plain concrete material and a preparation method thereof. The prepared plain concrete material not only has excellent anti-seepage performance, but also has excellent mechanical properties and frost resistance, which effectively ensures its quality while also extending its service life to a certain extent.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A seepage-resistant and reinforced plain concrete material is composed of the following raw materials in parts by weight: 300-400 parts of cementitious material, 950-1100 parts of coarse aggregate, 700-900 parts of fine aggregate, 80-110 parts of fly ash, 30-40 parts of silica fume, 40-50 parts of mineral powder, 2-4 parts of water reducer, 6-10 parts of anti-seepage additive and 180-240 parts of water.
[0008] Furthermore, the cementitious material is selected from any one of PO 42.5 ordinary Portland cement and PO 52.5 ordinary Portland cement.
[0009] Furthermore, the coarse aggregate is crushed stone with a particle size of 5 to 20 mm and continuous grading, and the fine aggregate is river sand with a fineness modulus of 2.5 to 3.5.
[0010] Furthermore, the fly ash is Class II ash, with a water requirement ratio of ≤105%, a loss on ignition of ≤8%, and a specific surface area of ≥400m 2 / kg.
[0011] Furthermore, the mineral powder is grade II ground slag powder, with a water requirement ratio of ≤100%, a loss on ignition of ≤3%, a 28d activity index of ≥105%, and a specific surface area of ≥550m 2 / kg.
[0012] Furthermore, the water reducer is any one of BASF MELFLUX 2651F water reducer, BASF RHEOPLUS 410 water reducer, and BASF RHEOPLUS 420 water reducer.
[0013] Furthermore, the silica fume is SF93, and the silica content in the silica fume is ≥85%, the average particle size is 0.1-0.2 μm, the moisture content is <1%, the loss on ignition is <5%, the pozzolanic activity index is >90%, and the specific surface area is ≥15000 m 2 / kg.
[0014] Furthermore, the preparation method of the anti-seepage aid comprises the following steps:
[0015] Step 1, adding sodium 3-allyloxy-2-hydroxypropanesulfonate to butanol at a dosage ratio of 20 to 50 g / L, then adding N,N-dicyclohexylcarbodiimide with a mass of 10 to 20% of the mass of sodium 3-allyloxy-2-hydroxypropanesulfonate, mixing and stirring to fully dissolve it, then adding a spherical carrier with a mass of 1 to 2 times that of the mass of sodium 3-allyloxy-2-hydroxypropanesulfonate, uniformly dispersing it, and reflux reacting under nitrogen for 5 to 8 hours; after the reaction is completed, filtering the obtained reaction product, washing the filter cake with anhydrous ethanol and acetone for 3 to 4 times, respectively, and then vacuum drying it to constant weight, and the obtained modified spherical carrier is stored for future use;
[0016] Step 2: xylene and cis-octadecene-9-acid are mixed in a mass ratio of 2 to 3:1, and then a modified spherical carrier with a mass of 50 to 80% of cis-octadecene-9-acid and 40 to 60% of trihydroxyethylamine are added. After mixing and stirring evenly, the mixture is kept warm at a temperature of 90 to 100° C. for 4 to 6 hours. After the reaction is completed, the resultant components are naturally cooled to room temperature, and then filtered, washed with alcohol, washed with water and dried in sequence to obtain an anti-seepage agent.
[0017] Furthermore, the preparation method of the spherical carrier comprises the following steps:
[0018] The first step is to mix and stir a 20-25wt% ammonia solution and ethanol in a volume ratio of 1:16-20, place the resulting mixture in a constant temperature water bath at 30-40°C, and then slowly dropwise add a 6-10% volume of tetraethoxysilane ethanol dispersion with a volume concentration of 40-60% to the mixture, mix and stir evenly, and then stir at a temperature of 30-40°C for 20-25 hours; after the reaction is completed, centrifuge the resulting product components, wash with alcohol, and dry them, and store the resulting solid powder for future use;
[0019] In the second step, the solid powder is evenly dispersed in deionized water at a solid-liquid ratio of 10 to 30 g / L, and then kept warm at a temperature of 100 to 130°C for 15 to 25 hours. After the reaction is completed, the resulting components are centrifuged, washed with alcohol, and dried in sequence to obtain a spherical carrier.
[0020] A method for preparing an anti-seepage reinforced plain concrete material comprises the following steps:
[0021] S1. After washing and drying the aggregate, place it in a cool place for later use; then put the cementitious material, fly ash, silica fume and mineral powder into the mixing equipment and mix and stir for 2 to 5 minutes; after stirring, add water, coarse aggregate, fine aggregate and remaining raw materials, stir mechanically until evenly mixed, then pour the resulting mixed slurry into a mold and shake it lightly to compact it into shape;
[0022] S2. The formed concrete test blocks are placed in a constant temperature room and demolded after curing for 24 hours. The demolded concrete test blocks are moved to a curing yard and cured for 28 days at a humidity of 95% and a temperature of 25°C. The final product is the finished product of the anti-seepage reinforced plain concrete material.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] The present invention uses ammonia water, ethanol, and tetraethoxysilane ethanol dispersion as raw materials and adopts a hydrothermal synthesis method to prepare nano-silica having a spherical and porous morphology, namely a spherical carrier. Simultaneously, the present invention adds sodium 3-allyloxy-2-hydroxypropanesulfonate and N,N-dicyclohexylcarbodiimide into butanol, and then adds the spherical carrier thereto. After uniform dispersion, the mixture is refluxed under nitrogen protection to react, so that the sodium 3-allyloxy-2-hydroxypropanesulfonate is anchored on the surface of the spherical carrier and on the inner wall of its porous structure through a chemical reaction. Under the action of the sodium 3-allyloxy-2-hydroxypropanesulfonate, the modified spherical carrier has excellent hydrophobicity. The gained modified spherical carrier is added into the mixed solution consisting of dimethylbenzene and cis-octadecene-9-acid together with trihydroxyethylamine, and insulation reaction is carried out after mixing and stirring evenly, cis-octadecene-9-acid is effectively grafted on the surface of the modified spherical carrier and the inner wall of its porous structure by chemical bond under the action of trihydroxyethylamine, and finally forms a dense and staggered three-dimensional hydrophobic network in the inner wall of the surface of the spherical carrier and its porous structure under the synergistic effect of 3-allyloxy-2-hydroxypropanesulfonic acid sodium and cis-octadecene-9-acid, so that the prepared anti-seepage aid and clear-water concrete material have excellent anti-seepage performance. In addition, the anti-seepage aid also has a small size effect, can effectively fill the gap of the concrete matrix, and it cooperates with fly ash to effectively improve the compactness of the concrete material, further improve the anti-seepage performance and antifreeze performance of the clear-water concrete material, and effectively ensure the quality and quality of clear-water concrete. In addition, the clear-water concrete material prepared by the present invention also has excellent mechanical properties, effectively ensures that its quality also extends its service life to a certain extent. DETAILED DESCRIPTION
[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.
[0026] Example 1
[0027] A seepage-resistant and reinforced plain concrete material is composed of the following raw materials in parts by weight: 300 parts of PO 42.5 ordinary Portland cement, 950 parts of coarse aggregate, 700 parts of fine aggregate, 80 parts of fly ash, 30 parts of silica fume, 40 parts of mineral powder, 2 parts of BASF MELFLUX 2651F water reducer, 6 parts of an anti-seepage additive, and 180 parts of water.
[0028] Coarse aggregate should be hard, well-graded crushed stone or pebbles, with a continuously graded particle size of 5 to 20 mm. This gradation creates a good skeleton structure between the coarse aggregate. Continuously graded coarse aggregate reduces voids and makes the concrete denser. The content of needle-like particles in the coarse aggregate should not be too high, not exceeding 10%, as these particles can affect the workability and strength of the concrete. Furthermore, the mud content of the coarse aggregate should be controlled below 1.0%.
[0029] Fine aggregate should be river sand with a fineness modulus between 2.5 and 3.5. This type of fine aggregate has a well-graded particle size and low void content. This well-graded particle size reduces cement paste usage while ensuring concrete workability. The mud content of fine aggregate should be strictly controlled, generally not exceeding 2.0%, as excessive mud can affect the strength and color of concrete and may reduce its durability.
[0030] Fly ash is Class II ash, with a water requirement ratio of 105%, a loss on ignition of 8%, and a specific surface area of 400m 2 / kg.
[0031] Fly ash mainly plays the following roles:
[0032] 1. It can improve the workability of concrete, enhancing its fluidity and reducing bleeding and segregation. This is because the spherical particles of fly ash act as ball bearings, providing lubrication within the concrete mix. Furthermore, the addition of fly ash can slightly extend the setting time of concrete.
[0033] 2. Incorporating fly ash in the early stages of concrete hydration will slow down the concrete's strength growth. This is because the fly ash's pozzolanic activity is less effective in the early stages. However, over time, in the later stages of hydration, the active components in the fly ash undergo a secondary hydration reaction with calcium hydroxide, a cement hydration product, to form CSH gel, which increases the concrete's strength.
[0034] 3. It can improve concrete's impermeability. Its spherical particles and the gel generated by the secondary hydration reaction can fill concrete's pores, preventing the intrusion of moisture and harmful ions. Fly ash also improves concrete's resistance to chemical attacks, such as sulfate attack and alkali-aggregate reaction. It also helps improve concrete's freeze-thaw resistance, reducing damage caused by freeze-thaw cycles.
[0035] The slag powder is grade II ground slag powder, with a water requirement ratio of 100%, a loss on ignition of 3%, a 28-day activity index of 105%, and a specific surface area of 550m 2 / kg.
[0036] Mineral powder can play the following roles:
[0037] 1. It can increase the cohesiveness of concrete, making the concrete more uniform during mixing and pouring and less likely to segregate.
[0038] 2. It undergoes a secondary hydration reaction with calcium hydroxide, a cement hydration product, to generate a gelling product that fills the pores inside the concrete, thereby improving the later strength of the concrete.
[0039] 3. It can improve the concrete's impermeability, frost resistance, and chemical erosion resistance. In terms of impermeability, the secondary hydration reaction products of the mineral powder fill pores, reducing the penetration channels of water and harmful ions. In terms of frost resistance, it improves the concrete's microstructure, making it better able to withstand freeze-thaw cycles. In terms of chemical erosion resistance, it can effectively resist the erosion of chemicals such as sulfates on concrete.
[0040] The silica fume is SF93, and the silica content in the silica fume is 85%, the average particle size is 0.1μm, the moisture content is 0.8%, the loss on ignition is 4.55%, the pozzolana activity index is 92%, and the specific surface area is 15000m 2 / kg.
[0041] Silica fume mainly plays the following roles:
[0042] 1. Due to its small particles, it can play a good filling role in plain concrete, improve the rheological properties of concrete, and make the concrete more viscous. At the same time, it can also reduce the bleeding and segregation of plain concrete and improve the stability of concrete.
[0043] 2. It has high pozzolanic activity and can undergo secondary hydration reaction with calcium hydroxide, a cement hydration product, to generate more CSH gel. This gel can fill the pores inside the concrete, increase the density of the concrete, and thus significantly improve the mechanical properties of the concrete.
[0044] 3. It can refine the pore structure of concrete, effectively reducing its porosity, particularly by reducing the number of harmful pores, thereby improving its impermeability. It can also enhance concrete's resistance to chemical attacks, such as sulfate and chloride ion corrosion. Silica fume can also improve concrete's freeze-thaw resistance, as its filling effect and the gel formed by the secondary hydration reaction prevent water migration and ice crystal formation within the concrete.
[0045] Water reducer can reduce the water-cement ratio while ensuring the workability of concrete, thereby reducing the slump loss of concrete. It can also maintain good fluidity at a lower water-cement ratio and improve the strength of concrete.
[0046] The preparation method of the anti-seepage aid comprises the following steps:
[0047] Step 1, adding sodium 3-allyloxy-2-hydroxypropanesulfonate to butanol at a dosage ratio of 20 g / L, then adding N,N-dicyclohexylcarbodiimide with a mass of 10-20% of sodium 3-allyloxy-2-hydroxypropanesulfonate, mixing and stirring to fully dissolve it, then adding a spherical carrier with the same mass as sodium 3-allyloxy-2-hydroxypropanesulfonate, uniformly dispersing it, and reflux reacting under nitrogen for 5 hours; after the reaction is completed, filtering the obtained reaction product, washing the filter cake with anhydrous ethanol and acetone three times respectively, and then vacuum drying it to constant weight, and the obtained modified spherical carrier is stored for future use;
[0048] Step 2: xylene and cis-octadecene-9-acid are mixed in a mass ratio of 2:1, and then a modified spherical carrier with a mass of 50% of cis-octadecene-9-acid and 40% of trihydroxyethylamine are added. After mixing and stirring evenly, the mixture is kept warm at 90°C for 6 hours. After the reaction is completed, the resultant components are naturally cooled to room temperature, and then filtered, washed with alcohol, washed with water and dried in sequence to obtain an anti-seepage agent.
[0049] The preparation method of the spherical carrier comprises the following steps:
[0050] The first step is to mix and stir a 20wt% ammonia solution and ethanol in a volume ratio of 1:16, place the resulting mixture in a constant temperature water bath at 30°C, and then slowly dropwise add a 6% volume of tetraethoxysilane ethanol dispersion with a volume concentration of 40% to the mixture. After mixing and stirring, stir and react at 30°C for 25 hours. After the reaction is completed, centrifuge, wash with alcohol, and dry the resulting product components in sequence, and store the resulting solid powder for future use.
[0051] In the second step, the solid powder is evenly dispersed in deionized water at a solid-liquid ratio of 10 g / L, and then kept warm at 100°C for 25 hours. After the reaction is completed, the resulting components are centrifuged, washed with alcohol, and dried in sequence to obtain a spherical carrier.
[0052] A method for preparing an anti-seepage reinforced plain concrete material comprises the following steps:
[0053] S1. After washing and drying the aggregate, place it in a cool place for later use; then put the cementitious material, fly ash, silica fume and mineral powder into the mixing equipment and mix and stir for 2 minutes; after stirring, add water, coarse aggregate, fine aggregate and remaining raw materials, stir mechanically until evenly mixed, then pour the resulting mixed slurry into a mold and shake it lightly to compact it into shape;
[0054] S2. The formed concrete test blocks are placed in a constant temperature room and demolded after curing for 24 hours. The demolded concrete test blocks are moved to a curing yard and cured for 28 days at a humidity of 95% and a temperature of 25°C. The final product is the finished product of the anti-seepage reinforced plain concrete material.
[0055] Example 2
[0056] The preparation method of an anti-seepage enhanced plain concrete material provided in this embodiment is basically the same as that in Example 1, except that the specific composition of the concrete material and the preparation method of the anti-seepage aid are not exactly the same. The specific composition of the concrete material and the preparation method of the anti-seepage aid in this embodiment are as follows:
[0057] A seepage-resistant and reinforced plain concrete material is composed of the following raw materials in parts by weight: 350 parts of PO 42.5 ordinary Portland cement, 1000 parts of coarse aggregate, 800 parts of fine aggregate, 100 parts of fly ash, 35 parts of silica fume, 45 parts of mineral powder, 3 parts of BASF RHEOPLUS 410 water reducer, 8 parts of an anti-seepage additive, and 220 parts of water.
[0058] The preparation method of the anti-seepage aid comprises the following steps:
[0059] Step 1, adding sodium 3-allyloxy-2-hydroxypropanesulfonate to butanol at a dosage ratio of 30g / L, then adding N,N-dicyclohexylcarbodiimide with a mass of 15% of sodium 3-allyloxy-2-hydroxypropanesulfonate, mixing and stirring to fully dissolve it, then adding a spherical carrier with a mass of 1.5 times that of sodium 3-allyloxy-2-hydroxypropanesulfonate, evenly dispersing it, and reflux reacting under nitrogen for 6 hours; after the reaction is completed, filtering the obtained reaction product, washing the filter cake with anhydrous ethanol and acetone three times respectively, and then vacuum drying to constant weight, and the obtained modified spherical carrier is stored for future use;
[0060] Step 2: xylene and cis-octadecene-9-acid are mixed in a mass ratio of 2.5:1, and then a modified spherical carrier with a mass of 60% of cis-octadecene-9-acid and 50% of trihydroxyethylamine are added. After mixing and stirring evenly, the mixture is kept warm at 95°C for 5 hours. After the reaction is completed, the resultant components are naturally cooled to room temperature, and then filtered, washed with alcohol, washed with water and dried in sequence to obtain an anti-seepage agent.
[0061] The preparation method of the spherical carrier comprises the following steps:
[0062] The first step is to mix and stir a 20wt% ammonia solution and ethanol in a volume ratio of 1:18, place the resulting mixture in a constant temperature water bath at 35°C, and then slowly dropwise add a 50% volume concentration of tetraethoxysilane ethanol dispersion of 8% by volume to the mixture, mix and stir evenly, and stir at 35°C for 25 hours; after the reaction is completed, centrifuge, wash with alcohol, and dry the resulting product components in sequence, and store the resulting solid powder for future use;
[0063] In the second step, the solid powder is evenly dispersed in deionized water at a solid-liquid ratio of 20 g / L, and then kept warm at 110°C for 20 hours. After the reaction is completed, the resulting components are centrifuged, washed with alcohol, and dried in sequence to obtain a spherical carrier.
[0064] Example 3
[0065] The preparation method of an anti-seepage enhanced plain concrete material provided in this embodiment is basically the same as that in Example 1, except that the specific composition of the concrete material and the preparation method of the anti-seepage aid are not exactly the same. The specific composition of the concrete material and the preparation method of the anti-seepage aid in this embodiment are as follows:
[0066] A seepage-resistant and reinforced plain concrete material is composed of the following raw materials in parts by weight: 400 parts of PO 42.5 ordinary Portland cement, 1100 parts of coarse aggregate, 900 parts of fine aggregate, 110 parts of fly ash, 40 parts of silica fume, 50 parts of mineral powder, 4 parts of BASF RHEOPLUS 420 water reducer, 10 parts of an anti-seepage additive, and 240 parts of water.
[0067] The preparation method of the anti-seepage aid comprises the following steps:
[0068] Step 1, adding sodium 3-allyloxy-2-hydroxypropanesulfonate to butanol at a dosage ratio of 50 g / L, then adding N, N-dicyclohexylcarbodiimide with a mass of 20% of sodium 3-allyloxy-2-hydroxypropanesulfonate, mixing and stirring to fully dissolve it, then adding a spherical carrier with a mass of 2 times that of sodium 3-allyloxy-2-hydroxypropanesulfonate, evenly dispersing it, and reflux reacting under nitrogen for 8 hours; after the reaction is completed, filtering the obtained reaction product, washing the filter cake with anhydrous ethanol and acetone 4 times respectively, and then vacuum drying to constant weight, and the obtained modified spherical carrier is stored for future use;
[0069] Step 2: xylene and cis-octadecene-9-acid are mixed in a mass ratio of 3:1, and then a modified spherical carrier with a mass of 80% of cis-octadecene-9-acid and 60% of trihydroxyethylamine are added. After mixing and stirring evenly, the mixture is kept warm at 100°C for 4 hours. After the reaction is completed, the resultant components are naturally cooled to room temperature, and then filtered, washed with alcohol, washed with water and dried in sequence to obtain an anti-seepage agent.
[0070] The preparation method of the spherical carrier comprises the following steps:
[0071] The first step is to mix and stir a 25wt% ammonia solution and ethanol in a volume ratio of 1:20, place the resulting mixture in a constant temperature water bath at 40°C, and then slowly dropwise add a 10% volume of tetraethoxysilane ethanol dispersion with a volume concentration of 60% to the mixture. After mixing and stirring, stir and react at 40°C for 20 hours. After the reaction is completed, centrifuge, wash with alcohol, and dry the resulting product components in sequence, and store the resulting solid powder for future use.
[0072] In the second step, the solid powder is evenly dispersed in deionized water at a solid-liquid ratio of 30 g / L, and then kept warm at 130°C for 15 hours. After the reaction is completed, the resulting components are centrifuged, washed with alcohol, and dried in sequence to obtain a spherical carrier.
[0073] Comparative Example 1 is different from Example 1 in that an equal amount of modified spherical carrier is used instead of the anti-seepage aid in this comparative example.
[0074] Comparative Example 2 is different from Example 1 in that an equal amount of spherical carriers is used instead of the anti-seepage aid in this comparative example.
[0075] Performance test: The anti-seepage reinforced plain concrete material samples provided in Examples 1 to 3 and Comparative Examples 1 to 2 were respectively made into 100 mm × 100 mm × 100 mm concrete mold specimens, and the relevant properties of each group of concrete mold specimens were tested as follows:
[0076] 1. Compressive strength test: Refer to GB / T50107-2010 "Concrete Strength Test and Assessment Standard" to test the concrete mold specimens after curing for 5d, 7d, and 28d.
[0077] 2. Anti-permeability test: Refer to the water seepage height method in GB / T50082-2009 "Standard for test methods of long-term performance and durability of ordinary concrete" to test the concrete mold specimens cured for 5d, 7d, and 28d, and measure their penetration height H.
[0078] 3. Frost resistance test: The test is carried out according to the quick freezing method of GBT50082-2009 "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete".
[0079] And record the test data in the following table:
[0080]
[0081] Comparison and analysis of the relevant data in the table show that the clear-faced concrete material prepared by the present invention not only has excellent anti-seepage performance, but also has excellent mechanical properties and frost resistance, effectively ensuring its quality while also extending its service life to a certain extent. This shows that the anti-seepage reinforced clear-faced concrete material and preparation method provided by the present invention have a broader market prospect and are more suitable for promotion.
[0082] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0083] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. An anti-seepage reinforced plain concrete material, characterized in that: The concrete is composed of the following raw materials in parts by weight: 300-400 parts of cementitious materials, 950-1100 parts of coarse aggregate, 700-900 parts of fine aggregate, 80-110 parts of fly ash, 30-40 parts of silica fume, 40-50 parts of mineral powder, 2-4 parts of water reducer, 6-10 parts of anti-seepage agent and 180-240 parts of water.
2. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The cementitious material is selected from any one of PO 42.5 ordinary Portland cement and PO 52.5 ordinary Portland cement.
3. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The coarse aggregate is crushed stone with a particle size of 5 to 20 mm and continuous grading, and the fine aggregate is river sand with a fineness modulus of 2.5 to 3.
5.
4. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The fly ash is Class II ash, with a water requirement ratio of ≤105%, a loss on ignition of ≤8%, and a specific surface area of ≥400m 2 / kg.
5. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The mineral powder is grade II ground slag powder, with a water requirement ratio of ≤100%, a loss on ignition of ≤3%, a 28d activity index of ≥105%, and a specific surface area of ≥550m 2 / kg.
6. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The water reducer is any one of BASF MELFLUX 2651F water reducer, BASF RHEOPLUS 410 water reducer, and BASF RHEOPLUS 420 water reducer.
7. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The silica fume is SF93, and the silica content in the silica fume is ≥85%, the average particle size is 0.1-0.2 μm, the moisture content is <1%, the loss on ignition is <5%, the pozzolan activity index is >90%, and the specific surface area is ≥15000m 2 / kg.
8. The anti-seepage reinforced plain concrete material according to claim 1, characterized in that: The preparation method of the anti-seepage aid comprises the following steps: Step 1, adding sodium 3-allyloxy-2-hydroxypropanesulfonate to butanol at a dosage ratio of 20 to 50 g / L, then adding N,N-dicyclohexylcarbodiimide with a mass of 10 to 20% of the mass of sodium 3-allyloxy-2-hydroxypropanesulfonate, mixing and stirring to fully dissolve it, then adding a spherical carrier with a mass of 1 to 2 times that of the mass of sodium 3-allyloxy-2-hydroxypropanesulfonate, uniformly dispersing it, and reflux reacting under nitrogen for 5 to 8 hours; after the reaction is completed, filtering the obtained reaction product, washing the filter cake with anhydrous ethanol and acetone for 3 to 4 times, respectively, and then vacuum drying it to constant weight, and the obtained modified spherical carrier is stored for future use; Step 2: xylene and cis-octadecene-9-acid are mixed in a mass ratio of 2 to 3:1, and then a modified spherical carrier with a mass of 50 to 80% of cis-octadecene-9-acid and 40 to 60% of trihydroxyethylamine are added. After mixing and stirring evenly, the mixture is kept warm at a temperature of 90 to 100° C. for 4 to 6 hours. After the reaction is completed, the resultant components are naturally cooled to room temperature, and then filtered, washed with alcohol, washed with water and dried in sequence to obtain an anti-seepage agent.
9. The anti-seepage reinforced plain concrete material according to claim 8, characterized in that: The preparation method of the spherical carrier comprises the following steps: The first step is to mix and stir 20-25wt% ammonia solution and ethanol in a volume ratio of 1:16-20, place the resulting mixture in a constant temperature water bath at 30-40°C, and then slowly dropwise add 6-10% of the volume of tetraethoxysilane ethanol dispersion with a volume concentration of 40-60% to the mixture, mix and stir evenly, and then stir and react at a temperature of 30-40°C for 20-25 hours; after the reaction is completed, centrifuge, wash with alcohol, and dry the resulting product components in sequence, and store the resulting solid powder for future use; In the second step, the solid powder is evenly dispersed in deionized water at a solid-liquid ratio of 10 to 30 g / L, and then kept warm at a temperature of 100 to 130°C for 15 to 25 hours. After the reaction is completed, the resulting components are centrifuged, washed with alcohol, and dried in sequence to obtain a spherical carrier.
10. A method for preparing an anti-seepage reinforced plain concrete material according to any one of claims 1 to 9, characterized in that: The steps include: S1. After washing and drying the aggregate, place it in a cool place for later use; then put the cementitious material, fly ash, silica fume and mineral powder into the mixing equipment and mix and stir for 2 to 5 minutes; after stirring, add water, coarse aggregate, fine aggregate and remaining raw materials, stir mechanically until evenly mixed, then pour the resulting mixed slurry into a mold and shake it lightly to compact it into shape; S2. The formed concrete test blocks are placed in a constant temperature room and demolded after curing for 24 hours. The demolded concrete test blocks are moved to a curing yard and cured for 28 days at a humidity of 95% and a temperature of 25°C. The final product is the finished product of the anti-seepage reinforced plain concrete material.