Waterproof impervious pavement structure utilizing household garbage incineration ash
By using asphalt concrete surface layer, fly ash ground polymer base layer and anti-corrosion and impermeability resistant mud layer in the pavement structure, combined with glass fiber geogrid and drainage pipes, the problem of water and industrial solid waste accumulation in the road area is solved, and the problem of water and industrial solid waste accumulation is achieved. The waterproof, impermeability and strength of the pavement have improved, reducing construction costs and environmental impact.
Patent Information
- Application Number
- CN202420854015.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing pavement structure is prone to road area and water problems when facing heavy rain and plum rain weather, resulting in loose and peeling of pavement asphalt, severe accumulation of industrial solid waste, difficult to deal with, and insufficient strength and durability of existing pavement, resulting in service life. reduce.
Adopt a top-down pavement structure design, including asphalt concrete surface layer, fly ash ground polymer stabilized slag base layer, fly ash anti-corrosion and anti-seepage mud layer and ash slag light aggregate cushion layer, embedded in glass fiber geogrid, and A drainage pipe is installed on the top of the ash light aggregate cushion layer, and the water absorbent material is filled inside to improve drainage capacity.
It effectively solves the problem of road area water, enhances the strength and durability of the road, achieves good waterproof and impermeability effects, and reduces the accumulation of industrial solid waste through resource reuse, reduces the cost of highway construction, and has an environmentally friendly effect.
Smart Images
Figure CN222251573U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pavement structures, and in particular relates to a waterproof and anti-seepage pavement structure using ash residue from the incineration of domestic waste. Background Art
[0002] In recent years, the accumulation, pollution and difficulty in harmless treatment of industrial solid waste caused by ash from municipal solid waste incineration plants have become increasingly serious. Therefore, the rational treatment and effective reuse of industrial solid waste is an urgent problem that many large and medium-sized cities in my country face.
[0003] The ash residue after garbage incineration includes fly ash and slag. If these solid wastes are directly treated by general industrial methods or directly landfilled, they will directly cause huge pressure on the land area. Therefore, the use of fly ash to prepare geopolymers can not only replace cement binder materials, but also has good strength, low permeability, corrosion resistance and good durability. It is a new type of building material.
[0004] At present, the domestic road surface is seriously piled up with ash residue from the incineration of domestic domestic waste, which is difficult to dispose of and has a low utilization rate. In addition, most of the existing urban highway construction uses natural crushed stone as aggregate, and the cementitious materials are mostly cement materials, which require a large amount of stone and hydraulic materials, resulting in an increasingly tense supply and demand relationship. Although recycled brick-concrete aggregate products have also appeared in road construction, they have problems such as low strength and shrinkage and deformation of the base material after paving, resulting in prominent cracks in the road surface and reduced service life.
[0005] In addition, the road drainage channels are relatively simple, especially urban road drainage still adopts the traditional road surface inclination, or setting up shoulders, slopes, central median drainage, etc., which often causes poor drainage in the face of heavy rain. In particular, highways and urban roads in some areas are also affected by the plum rain weather, resulting in serious road surface water problems. In addition, the hydrodynamic conditions caused by driving loads can easily cause the loosening and peeling of the road surface asphalt. At the same time, the residual water inside the road surface is difficult to remove, which erodes the internal structure of the road surface and reduces the bearing capacity and stability of the roadbed. Utility Model Content
[0006] In order to solve the above problems, the utility model provides a waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste, which not only solves the problems of serious road waterlogging and large accumulation of industrial solid waste, but also can enhance the strength and durability of the road to a certain extent, and has good waterproof and anti-seepage effects.
[0007] The utility model is realized by the following technical solutions:
[0008] A waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste, comprising an asphalt concrete surface layer, a fly ash geopolymer stabilized slag base layer, a fly ash anti-corrosion and anti-seepage mastic layer, an ash lightweight aggregate cushion layer and a road base layer from top to bottom;
[0009] A glass fiber geogrid is embedded inside the asphalt concrete surface layer;
[0010] A drainage pipe is arranged on the top of the ash lightweight aggregate cushion layer, a plurality of drainage holes are opened on the upper side of the drainage pipe, and the interior of the drainage pipe is filled with water-absorbing material.
[0011] Furthermore, the materials of the fly ash geopolymer stabilized slag base layer, the fly ash anti-corrosion and anti-seepage mortar layer and the ash lightweight aggregate cushion layer all contain fly ash geopolymer made from domestic waste incineration ash.
[0012] Furthermore, the thickness of the fly ash geopolymer stabilized slag base layer is 30 to 40 cm.
[0013] Furthermore, the thickness of the ash lightweight aggregate cushion layer is 15 to 20 cm.
[0014] Furthermore, the water absorbing material adopts a water absorbing sponge core.
[0015] Furthermore, the shape of the drainage hole and its surroundings are concave.
[0016] Furthermore, a non-woven fabric layer is provided between the ash lightweight aggregate cushion layer and the fly ash anti-corrosion and anti-seepage mortar layer.
[0017] Furthermore, the mesh size of the glass fiber geogrid is 50×50 mm, the mesh thickness is 3.5 mm, and it can withstand a tensile strength of 120 KN.
[0018] Furthermore, for high-grade roads, the fly ash geopolymer stabilized slag base layer is divided into two layers, each layer is 18 to 22 cm thick; for low-grade roads, the fly ash geopolymer stabilized slag base layer is one layer, with a thickness of 18 to 22 cm.
[0019] Furthermore, for high-grade roads, the asphalt concrete surface layer consists of an upper layer with a thickness of 4-7 cm, a middle layer with a thickness of 6-8 cm, and a lower layer with a thickness of 8-12 cm;
[0020] For low-grade roads, the asphalt concrete surface layer consists of an upper layer with a thickness of 4-7 cm and a lower layer with a thickness of 6-10 cm.
[0021] Compared with the prior art, the utility model has the following beneficial technical effects:
[0022] The utility model discloses a waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste, which can be applied to different urban road grades. The pavement structure includes an asphalt concrete surface layer, a fly ash geopolymer stabilized slag base layer, a fly ash anti-corrosion and anti-seepage clay layer, an ash lightweight aggregate cushion layer, and a road base layer from top to bottom. The asphalt concrete surface layer is embedded with a glass fiber geogrid, which enhances the crack resistance of the surface layer to a certain extent and improves the strength and stability of the roadbed filling.
[0023] The fly ash geopolymer stabilized slag base uses fly ash geopolymer instead of cementitious materials, which not only provides sufficient strength, but also has good water stability, anti-shrinkage and anti-freezing properties. It can also effectively solve the problem of industrial solid waste accumulation, achieve the effect of resource recycling and waste treatment, reduce the cost of highway construction, and is both economical and environmentally friendly;
[0024] The fly ash anti-corrosion and anti-seepage mortar layer has good waterproofness and anti-seepage properties, can better protect the roadbed from damage, prevent water from seeping into the structure of the road surface, and maintain the strength and stability of the foundation.
[0025] The ash slag lightweight aggregate cushion layer can enhance the strength of the roadbed, improve the stability of the roadbed, and provide buffering and protection. A drainage pipe is arranged at the top of the interior of the ash slag lightweight aggregate cushion layer, and a plurality of drainage holes are opened on the upper side of the drainage pipe. Under the pressure of the vehicle on the road surface, water is sucked into the drainage pipe through the drainage holes of the drainage pipe by the water-absorbing material, and the coordination of the two enhances the drainage capacity of the road surface.
[0026] The utility model utilizes the material's own characteristics to make the pavement structure anti-corrosive and anti-seepage, prevents the accumulation of groundwater, realizes the efficient utilization of industrial solid waste on the basis of meeting the technical performance requirements of pavement specifications, and improves the strength and durability of the pavement at the same time.
[0027] Furthermore, the three layers of fly ash geopolymer stabilized slag base layer, fly ash anti-corrosion and anti-seepage mortar layer, and ash lightweight aggregate cushion layer all utilize fly ash geopolymer made from waste incineration ash, which makes diversified and efficient use of waste incineration ash, not only reduces cement production and reduces carbon dioxide emissions, and has a good environmental effect, but also solves the land occupation problem caused by ash accumulation and saves the construction and maintenance costs of the stacking site.
[0028] Furthermore, a non-woven fabric layer is arranged between the top of the drainage pipe and the fly ash anti-corrosion and anti-seepage mortar layer to absorb excess moisture in the pavement structure. Under the squeezing of the vehicle on the pavement, the water is sucked into the drainage pipe by the sponge core through the drainage holes of the drainage pipe. The coordination of the two enhances the drainage capacity of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the pavement structure of the utility model;
[0030] Figure 2 It is a schematic diagram of the internal drainage pipeline structure of the cushion layer of the utility model.
[0031] In the figure: 1. Asphalt concrete surface layer; 2. Fly ash geopolymer stabilized slag base layer; 3. Fly ash anti-corrosion and anti-seepage mortar layer; 4. Non-woven fabric layer; 5. Drainage pipe; 6. Ash lightweight aggregate cushion layer; 7. Road base layer; 8. Glass fiber geogrid; 9. Drainage holes; 10. Water-absorbent material. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the following is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments.
[0033] The components described and shown in the drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely represents a selected embodiment of the present invention. Based on the drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.
[0034] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, element, method, article or equipment that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, element, method, article or equipment.
[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0036] like Figure 1 As shown, the utility model provides a waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste, and its structure from top to bottom is an asphalt concrete surface layer 1, a fly ash geopolymer stabilized slag base layer 2, a fly ash anti-corrosion and anti-seepage mortar layer 3, an ash lightweight aggregate cushion layer 6 and a road base layer 7, a glass fiber geogrid 8 is embedded in the asphalt concrete surface layer 1, and a drainage pipe 5 is arranged at the top of the ash lightweight aggregate cushion layer 6.
[0037] Preferably, a non-woven fabric layer 4 is arranged above the drainage pipe 5 and between the fly ash anti-corrosion and anti-seepage mortar layer 3 to absorb excess moisture in the pavement structure. Under the pressure of the vehicle on the pavement, the water is sucked into the drainage pipe 5 by the water-absorbing material 10 through the drainage holes 9 of the drainage pipe. The two work together to enhance the drainage capacity of the pavement.
[0038] Except for the asphalt concrete surface layer 1, the materials of other structural layers are all made of domestic waste incineration ash, specifically fly ash geopolymer instead of cement, and slag and ash lightweight aggregate instead of natural crushed stone.
[0039] Fly ash geopolymer is made of fly ash from the incineration of domestic waste, slag powder, NaOH, Na2SiO3 and water through alkali-induced reaction, and its material composition ratio is 37:10:6:16:31. Its 7d and 28d compressive strengths are required to be no less than 10MPa and 32.5MPa.
[0040] The fly ash geopolymer stabilized slag base layer 2 is made of fly ash geopolymer and natural crushed stone, the fly ash geopolymer content is 12-14%, and the natural crushed stone is composed of 100% garbage incineration slag, which is suitable for any highway grade heavy traffic, medium and light traffic conditions.
[0041] The fly ash anti-corrosion and anti-seepage mortar layer 3 is formed by solidifying the fly ash geopolymer.
[0042] The ash lightweight aggregate cushion layer 6 is made of fly ash geopolymer, fine slag, calcium hydroxide, anhydrous sodium sulfate and distilled water through an alkali activation reaction. The alkali activator is a composite of calcium hydroxide and anhydrous sodium sulfate. The material composition ratio of the ash lightweight aggregate is 33:6:32:6:2:21, and its crushing value is not less than 28% and CBR is not less than 35%.
[0043] The thickness of the ash lightweight aggregate cushion layer 6 is 15 to 20 cm, which can be determined according to the traffic grade and the highway grade.
[0044] For high-grade highways, the asphalt concrete surface layer 1 consists of an upper layer (4-7cm), a middle layer (6-8cm) and a lower layer (8-12cm). For low-grade highways, the asphalt concrete surface layer 1 consists of an upper layer (4-7cm) and a middle layer (6-10cm).
[0045] More preferably, for high-grade roads, the fly ash geopolymer stabilized slag base layer 2 is paved in two layers, each layer is 18 to 22 cm thick; for low-grade roads, the fly ash geopolymer stabilized slag base layer 2 is paved in one layer, with a thickness of 18 to 22 cm; the fly ash geopolymer stabilized slag base layer of any road grade is paved in one layer, with a thickness of 18 to 22 cm.
[0046] Before paving begins, the site needs to be cleaned, and then the road base layer 7 is fully and evenly filled and compacted to meet relevant specifications and standards. Then the ash lightweight aggregate cushion layer 6 is paved, the maximum particle size shall not be greater than 50mm, and lime is added appropriately, with a dosage of 8% to 10% of the fine material, which is beneficial to increase the strength and stability of the ash lightweight aggregate cushion layer 6. The paving thickness of the ash lightweight aggregate cushion layer 6 is generally 15 to 20cm. When the paving is almost completed, the drainage pipe 5 is laid, the drainage hole 9 of the drainage pipe 5 faces upward, and the top surface of the drainage pipe 5 is flush with the top surface of the ash lightweight aggregate cushion layer 6. Then, a non-woven fabric layer 4 is laid on the top surface of the drainage pipe 5 (the top surface of the ash lightweight aggregate 6) to facilitate the absorption of moisture inside the road surface and water passing through the fly ash anti-corrosion and anti-seepage clay layer 3. The concave drainage holes 9 above and below the drainage pipe 5 and the internal sponge core can better gather and absorb moisture.
[0047] Then the fly ash anti-corrosion and anti-seepage mortar layer 3 is laid. The fly ash anti-corrosion and anti-seepage mortar layer 3 is solidified by fly ash geopolymer. It should be laid evenly. Since its setting time is short, the laying time should be paid attention to. It has good corrosion resistance, waterproof and anti-seepage properties, can isolate and protect the roadbed soil, and can prevent water in the pavement structure from seeping into the roadbed, playing a waterproof role.
[0048] Secondly, the fly ash geopolymer stabilized slag gravel base 2 is paved, using a centralized factory mixing method, in which fly ash geopolymer is used to replace 70% of cement materials, and the fine slag of 0-4.75mm and the coarse slag of 4.75-10mm obtained after the slag is crushed are mixed with gravel to replace aggregates. Technical personnel in this field can choose the appropriate amount of mixing according to the road grade. It is recommended to use two pavers for step-by-step joint paving during paving, control the paving time, and pay attention to the material segregation. The rolling process is divided into initial compaction, secondary compaction and final compaction. Among them, the initial compaction uses a rubber-wheeled roller + a double steel-wheeled roller, with the rubber-wheeled roller in front and the double steel-wheeled roller in the back, following the paver, and the number of compaction is not less than 2 times; the secondary compaction uses a vibrating roller, first with weak vibration 1 time, then with strong vibration for no less than 4 times, and finally with weak vibration 1 time; the final compaction uses a wheel roller or a combination with a double steel-wheeled roller, and the standard for stopping compaction is to bridge the surface microcracks, looseness and eliminate wheel marks. After rolling is completed, cover and water are promptly applied for curing. After the fly ash geopolymer stabilized slag gravel base 2 is cured, the asphalt concrete surface layer 1 is paved. When the paving height reaches 5 cm, the glass fiber geogrid 8 is laid. The mesh size of the glass fiber geogrid 8 is 50×50 mm, the mesh thickness is 3.5 mm, and it can withstand a tensile strength of 120 KN. During the laying process, the surface of the paved asphalt concrete is ensured to be flat. Then, the remaining thickness of the asphalt concrete surface layer 1 is paved.
[0049] This pavement structure can not only prevent water accumulation inside the pavement, reduce water damage to the pavement, and extend the service life of the road, but also improve the pavement strength and the bearing capacity of the base. In addition, its structural layers all use fly ash geopolymers instead of cementitious materials, and slag instead of part of the aggregate, which effectively solves the problem of industrial solid waste accumulation, achieves the effect of resource recycling and waste treatment, reduces the cost of highway construction, and is both economical and environmentally friendly.
[0050] The pavement structure designed by the utility model utilizes the prepared fly ash geopolymer and fine slag to granulate to prepare ash slag lightweight aggregate instead of coarse aggregate, and then the fly ash geopolymer, slag and ash slag lightweight aggregate are coordinated and efficiently applied to road engineering, replacing the traditional cement stabilized base layer to form a waterproof and anti-seepage pavement structure utilizing the ash from the incineration of domestic waste, which not only achieves the effect of environmental protection and turns industrial solid waste into treasure, but also can solve the tense situation of shortage of road sand and gravel materials, and find alternative solutions to the supply and demand of sand and gravel materials for road construction.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. A waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste, characterized in that: It comprises, from top to bottom, an asphalt concrete surface layer (1), a fly ash geopolymer stabilized slag base layer (2), a fly ash anti-corrosion and anti-seepage mastic layer (3), an ash slag lightweight aggregate cushion layer (6) and a road base layer (7); A glass fiber geogrid (8) is embedded inside the asphalt concrete surface layer (1); A drainage pipe (5) is provided on the top of the ash lightweight aggregate cushion layer (6), a plurality of drainage holes (9) are opened on the upper side of the drainage pipe (5), and the interior of the drainage pipe (5) is filled with water-absorbing material (10).
2. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1 is characterized in that: The materials of the fly ash geopolymer stabilized slag base layer (2), the fly ash anti-corrosion and anti-seepage mortar layer (3) and the ash lightweight aggregate cushion layer (6) all contain fly ash geopolymer made from domestic waste incineration ash.
3. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1 is characterized in that: The thickness of the fly ash geopolymer stabilized slag base layer (2) is 30-40 cm.
4. The waterproof and anti-seepage pavement structure using ash from the incineration of domestic waste according to claim 1 is characterized in that: The thickness of the ash lightweight aggregate cushion layer (6) is 15 to 20 cm.
5. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1 is characterized in that: The water absorbing material (10) adopts a water absorbing sponge core.
6. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1 is characterized in that: The shape of the drainage hole (9) and its surroundings are concave.
7. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1 is characterized in that: A non-woven fabric layer (4) is provided between the ash lightweight aggregate cushion layer (6) and the fly ash anti-corrosion and anti-seepage mortar layer (3).
8. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1, characterized in that: The mesh size of the glass fiber geogrid (8) is 50×50 mm, the mesh thickness is 3.5 mm, and it can withstand a tensile strength of 120 KN.
9. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1, characterized in that: For high-grade roads, the fly ash geopolymer stabilized slag base layer (2) is divided into two layers, each layer is 18 to 22 cm thick; for low-grade roads, the fly ash geopolymer stabilized slag base layer (2) is one layer, with a thickness of 18 to 22 cm.
10. The waterproof and anti-seepage pavement structure using domestic waste incineration ash according to claim 1, characterized in that: For high-grade roads, the asphalt concrete surface layer (1) consists of an upper layer with a thickness of 4-7 cm, a middle layer with a thickness of 6-8 cm, and a lower layer with a thickness of 8-12 cm; For low-grade roads, the asphalt concrete surface layer (1) consists of an upper layer with a thickness of 4-7 cm and a lower layer with a thickness of 6-10 cm.