Recycled aggregate durable pavement structure

Abstract

The utility model relates to a kind of recycled aggregate durable pavement structure, it includes: stratiform main body, the stratiform main body sequentially includes from bottom to top: recycled aggregate particle compaction layer, mortar concrete pouring lower layer, mortar concrete pouring upper layer and inorganic cementing material reinforcing layer;The thickness of the recycled aggregate particle layer is 2~4cm, recycled aggregate particle is obtained by waste tyre;The thickness of the mortar concrete pouring lower layer is 8~12cm, the thickness of the mortar concrete pouring upper layer is 7~8cm;The thickness of the inorganic cementing material reinforcing layer is 5~10cm.

Description

Technical Field

[0001] This utility model relates to the field of road surface technology, and in particular to a durable road surface structure using recycled aggregate. Background Technology

[0002] Road surface refers to the layered structure paved on the roadbed with various road construction materials that directly bears the load of vehicles. A good quality road surface should have sufficient strength and good stability, and its surface should meet the requirements of being flat, dense and skid-resistant. The quality of the road surface structure directly affects driving speed, safety and transportation costs.

[0003] Currently, most road surfaces are constructed using ordinary concrete. Over long periods of use, repeated rolling and friction by vehicles can cause surface wear, leading to reduced road smoothness, decreased skid resistance, and compromised driving safety. Furthermore, its crack resistance is poor, making it prone to cracking under the influence of temperature changes and uneven foundation settlement. Further development of these cracks can damage the road structure and shorten the road's service life. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a durable road surface structure using recycled aggregate.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A durable pavement structure using recycled aggregate includes: a layered main body, which comprises, from bottom to top, a compacted layer of recycled aggregate particles, a lower layer of mortar concrete, an upper layer of mortar concrete, and an inorganic binder reinforcement layer.

[0007] The thickness of the compacted layer of recycled aggregate particles is 2-4 cm, and the recycled aggregate particles are obtained from waste tires; the thickness of the lower layer of mortar concrete is 8-12 cm, the thickness of the upper layer of mortar concrete is 7-8 cm, and the thickness of the inorganic binder reinforcement layer is 5-10 cm.

[0008] As one embodiment of this utility model, both the lower and upper layers of the mortar concrete are made by adding water-reducing agents, slag powder, and fly ash-based ultrafine admixtures to ordinary cement mortar.

[0009] As one embodiment of this utility model, the inorganic binder reinforcement layer is made by adding polypropylene fiber, expansion agent, water-reducing agent, ceramic particles, and ultrafine admixtures such as silica fume and fly ash to ordinary cement mortar.

[0010] As one embodiment of this utility model, it also includes a reinforcing component;

[0011] The reinforcing components include: a reinforcing plate, reinforcing ribs, a metal mesh, and fasteners. The reinforcing plate is disposed between the compacted recycled aggregate particles and the lower layer of mortar concrete, and the metal mesh is disposed between the lower layer of mortar concrete and the upper layer of mortar concrete.

[0012] Multiple reinforcing ribs are provided, with the bottom of each reinforcing rib set on the reinforcing plate and the top end passing through the metal mesh and then being fixed by a fastener.

[0013] In one embodiment of this utility model, the top of the reinforcing rib and the fixing member are both located inside the upper layer of the mortar concrete pouring.

[0014] In one embodiment of this utility model, the bottom of the reinforcing plate is provided with a needle array composed of multiple needles arranged in a specific pattern, the needles being used to penetrate into the compacted layer of the recycled aggregate particles.

[0015] In one embodiment of this utility model, the fixing component includes a pad, a spherical washer, and a nut;

[0016] The pad has a central through hole, and the size of the central through hole is larger than the outer diameter of the reinforcing rib.

[0017] The spherical washer is fitted onto the reinforcing rib. It is in the shape of a hollow frustum, with the small end of the frustum penetrating into the central through hole, so that the spherical washer abuts against the pad, and then the pad abuts against the lower layer of mortar concrete.

[0018] The nut is threadedly connected to the reinforcing rib.

[0019] The beneficial effects of adopting the above technical solution are as follows:

[0020] The recycled aggregate durable pavement structure provided in this embodiment of the invention has the following advantages:

[0021] In the inorganic binder reinforcement layer of recycled aggregate durable pavement structures, the ceramic particles have high hardness and strong wear resistance, which can effectively resist the wear of vehicle tires, extend the service life of the pavement, reduce the frequency of maintenance and repaving, and reduce maintenance costs.

[0022] The polypropylene fibers and reinforcing components of the inorganic binder reinforcement layer enhance the toughness of the concrete and inhibit the generation and propagation of cracks; the flexible buffering effect of the bottom rubber particle layer reduces cracks in the pavement caused by foundation deformation and temperature stress, thereby improving the integrity and durability of the pavement structure.

[0023] The intermediate mortar concrete pouring layer and the inorganic binder reinforcement layer work together to withstand greater traffic loads, meet the needs of heavy traffic, ensure the stability of the road surface during long-term use, and reduce the risk of road surface deformation and damage.

[0024] The bottom layer of recycled aggregate particles uses rubber granules processed from waste tires, realizing the resource utilization of waste materials, reducing the environmental pollution caused by waste tires, and meeting the requirements of sustainable development. Meanwhile, the middle layer uses industrial waste such as slag powder and fly ash, reducing the consumption of natural resources and demonstrating good environmental benefits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a durable road surface structure using recycled aggregate provided in an embodiment of this utility model.

[0026] Figure 2 This is a schematic diagram of another durable road surface structure using recycled aggregate provided in this embodiment of the present invention.

[0027] Figure 3 This is a structural schematic diagram of a reinforcing rib and a fastener provided in an embodiment of this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of a spherical washer provided in an embodiment of this utility model.

[0029] Figure 5 yes Figure 4 A sectional view.

[0030] The structure consists of: 1 layered main body, 101 recycled aggregate compacted layer, 102 lower layer of mortar concrete, 103 upper layer of mortar concrete, and 104 inorganic binder reinforcement layer.

[0031] 2 Reinforcing components, 201 Reinforcing plate, 201-1 Needle array, 202 Reinforcing rib, 203 Metal mesh, 204 Fastener, 204-1 Pad, 204-2 Spherical washer, 204-3 Nut, 204-4 Center through hole, 204-5 Disc-shaped part, 204-6 Plate-shaped part. Detailed Implementation

[0032] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0033] This utility model embodiment provides a durable pavement structure using recycled aggregate, such as... Figure 1As shown, it includes: a layered main body 1, which includes, from bottom to top, a recycled aggregate compacted layer 101, a mortar concrete pouring lower layer 102, a mortar concrete pouring upper layer 103, and an inorganic binder reinforcing layer 104.

[0034] The thickness of the compacted layer of recycled aggregate particles is 2-4 cm, and the recycled aggregate particles are obtained from waste tires; the thickness of the lower layer 102 of the mortar concrete pouring is 8-12 cm, the thickness of the upper layer 103 of the mortar concrete pouring is 7-8 cm, and the thickness of the inorganic binder reinforcing layer 104 is 5-10 cm.

[0035] Specifically, the compacted layer of recycled aggregate particles can be laid using a paver, which evenly spreads rubber particles obtained from waste tires on the roadbed. During the laying process, a vibratory roller is used to statically compact the layer 1-2 times to ensure the flatness and density of the rubber particle layer.

[0036] Both the lower layer 102 and the upper layer 103 of mortar concrete are prepared by adding water-reducing agent, slag powder, and fly ash-based ultrafine admixtures to ordinary cement mortar. The upper layer 103 of mortar concrete can also be roughened with a depth of 1-2 mm. In one possible implementation, the preparation method is as follows: PO 42.5 cement, slag powder, fly ash, medium sand, and crushed stone are poured into a mixer and dry-mixed at a low speed, such as 20-30 r / min, for 1 minute; then, water and water-reducing agent are added and mixed at a medium speed, such as 30-40 r / min, for 3 minutes to make the concrete mixture reach a homogeneous state; finally, the lower layer of mortar concrete is poured on the compacted layer 101 of recycled aggregate particles, and the upper layer of mortar concrete is poured on the lower layer of mortar concrete. The surface of the upper layer of mortar concrete is roughened with a broom, and the roughening depth is controlled at 1-2 mm to enhance the bond with the surface concrete.

[0037] The inorganic binder reinforcing layer 104 is prepared by adding polypropylene fibers, expanding agents, water-reducing agents, ceramic particles, and ultrafine admixtures such as silica fume and fly ash to ordinary cement mortar. In one possible implementation, its preparation method is as follows:

[0038] Add ceramic particles, PO 52.5 silicate cement, fine aggregate, coarse aggregate, and silica fume to a forced mixer and dry mix at a medium speed (30-40 rpm) for 2 minutes to ensure uniform mixing of all components. Slowly add water and water-reducing agent, then mix at a high speed (60-80 rpm) for 4 minutes until the concrete mixture has a uniform color. Finally, add polypropylene fiber and continue mixing at a medium speed for 3 minutes to ensure that the fiber is evenly dispersed in the concrete without clumping.

[0039] Furthermore, to improve strength, in one possible implementation, such as Figures 2-5As shown, it also includes a reinforcing component 2;

[0040] The reinforcing component 2 includes: a reinforcing plate 201, a reinforcing rib 202, a metal mesh 203, and a fastener 204. The reinforcing plate 201 is disposed between the compacted recycled aggregate particle layer 101 and the lower layer of mortar concrete, and the metal mesh 203 is disposed between the lower layer of mortar concrete 102 and the upper layer of mortar concrete 103.

[0041] Multiple reinforcing ribs 202 are provided. The bottom of each reinforcing rib 202 is provided on the reinforcing plate 201, and the top end passes through the metal mesh 203 and is fixed by the fastener 204.

[0042] This embodiment of the utility model does not specifically limit the position of the top of the reinforcing rib 202 and the position of the fixing member 204. For example, the top of the reinforcing rib 202 and the fixing member 204 are both located inside the upper layer 103 of the mortar concrete pouring.

[0043] In one possible implementation, in order to connect the reinforcing plate 201 to the recycled aggregate compaction layer 101, the bottom of the reinforcing plate 201 is provided with a needle array 201-1 composed of multiple needles arranged in a row. The needles are used to penetrate into the recycled aggregate compaction layer 101. Of course, several upward-sloping spikes can also be provided on the needle shafts of the needles to form a barb structure.

[0044] Regarding the structure of fastener 204, in one possible implementation, such as Figure 3 and Figure 4 As shown, the fastener 204 includes a pad 204-1, a spherical washer 204-2, and a nut 204-3;

[0045] The pad 204-1 is provided with a central through hole 204-4, and the size of the central through hole 204-4 is larger than the outer diameter of the reinforcing rib 202;

[0046] The spherical washer 204-2 is fitted onto the reinforcing rib 202. It is in the shape of a hollow frustum, and the small end of the frustum passes through the central through hole 204-4, so that the spherical washer 204-2 abuts against the pad 204-1, and then the pad 204-1 abuts against the lower layer 102 of the mortar concrete pouring.

[0047] The nut 204-3 is threadedly connected to the reinforcing rib 202.

[0048] In this case, the pad 204-1 includes a disc-shaped portion 204-5 and a plate-shaped portion 204-6. The disc-shaped portion 204-5 has a central through hole 204-7 at its center. One side of the disc-shaped portion 204-5 is flush with the plate-shaped portion 204-6, and the other side extends downward beyond the plate-shaped portion 204-6.

[0049] The recycled aggregate durable pavement structure provided in this embodiment of the utility model has the following advantages:

[0050] 1. Significantly improves wear resistance

[0051] The ceramic particles in the inorganic binder reinforcement layer have high hardness and strong wear resistance, which can effectively resist the wear of vehicle tires, extend the service life of the road surface, reduce the frequency of maintenance and repaving, and reduce maintenance costs.

[0052] 2. Enhance crack resistance

[0053] The polypropylene fibers and reinforcing components of the inorganic binder reinforcement layer enhance the toughness of the concrete and inhibit the generation and propagation of cracks; the flexible buffering effect of the bottom rubber particle layer reduces cracks in the pavement caused by foundation deformation and temperature stress, thereby improving the integrity and durability of the pavement structure.

[0054] 3. Enhance load-bearing capacity

[0055] The intermediate mortar concrete pouring layer and the inorganic binder reinforcement layer work together to withstand greater traffic loads, meet the needs of heavy traffic, ensure the stability of the road surface during long-term use, and reduce the risk of road surface deformation and damage.

[0056] 4. Environmental protection and resource recycling

[0057] The bottom layer of recycled aggregate particles uses rubber granules processed from waste tires, realizing the resource utilization of waste materials, reducing the environmental pollution caused by waste tires, and meeting the requirements of sustainable development. Meanwhile, the middle layer uses industrial waste such as slag powder and fly ash, reducing the consumption of natural resources and demonstrating good environmental benefits.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A durable pavement structure using recycled aggregate, characterized in that, It includes: The layered main body (1) comprises, from bottom to top, a recycled aggregate compaction layer (101), a mortar concrete pouring lower layer (102), a mortar concrete pouring upper layer (103), and an inorganic binder reinforcement layer (104). The thickness of the compacted recycled aggregate layer (101) is 2-4 cm; the thickness of the lower layer of mortar concrete (102) is 8-12 cm; the thickness of the upper layer of mortar concrete (103) is 7-8 cm; and the thickness of the inorganic binder reinforcing layer (104) is 5-10 cm.

2. The recycled aggregate durable pavement structure according to claim 1, characterized in that, It also includes a reinforcing component; wherein the reinforcing component includes: a reinforcing plate (201), a reinforcing rib (202), a metal mesh (203), and a fastener (204), wherein the reinforcing plate (201) is disposed between the compacted layer of recycled aggregate particles (101) and the lower layer of mortar concrete (102), and the metal mesh (203) is disposed between the lower layer of mortar concrete (102) and the upper layer of mortar concrete (103); Multiple reinforcing ribs (202) are provided. The bottom of each reinforcing rib (202) is provided on the reinforcing plate (201), and the top end passes through the metal mesh (203) and is fixed by the fastener (204).

3. The recycled aggregate durable pavement structure according to claim 2, characterized in that, The top of the reinforcing rib (202) and the fixing member (204) are both located inside the upper layer (103) of the mortar concrete pouring.

4. The recycled aggregate durable pavement structure according to claim 2, characterized in that, The bottom of the reinforcing plate (201) is provided with a needle array (201-1) consisting of multiple needles arranged in a row, the needles being used to penetrate into the compacted layer (101) of the recycled aggregate particles.

5. A durable pavement structure using recycled aggregate according to claim 2, characterized in that, The fastener (204) includes a pad (204-1), a spherical washer (204-2), and a nut (204-3). The pad (204-1) is provided with a central through hole (204-4), and the size of the central through hole (204-4) is larger than the outer diameter of the reinforcing rib (202); The spherical washer (204-2) is fitted onto the reinforcing rib (202). It is in the shape of a hollow frustum, and the small end of the frustum passes into the central through hole (204-4), so that the spherical washer (204-2) abuts against the pad (204-1), and then the pad (204-1) abuts against the lower layer (102) of the mortar concrete pouring. The nut (204-3) is threadedly connected to the reinforcing rib (202).

6. A durable pavement structure using recycled aggregate according to claim 5, characterized in that, The pad includes a disc-shaped portion (204-5) and a plate-shaped portion (204-6). The disc-shaped portion (204-5) has a central through hole (204-4) at its center. One side of the disc-shaped portion is flush with the plate-shaped portion (204-6), and the other side extends downward beyond the plate-shaped portion (204-6).

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