A permeable recycled concrete construction method for urban streets

Abstract

The present invention relates to the technical field of concrete preparation, and discloses a method for preparing permeable recycled concrete for urban streets, comprising a first permeable concrete layer, a second permeable concrete layer fixedly connected to the top surface of the first permeable concrete layer, and a third permeable concrete layer fixedly connected to the top surface of the second permeable concrete layer, wherein the constituent materials of the first permeable concrete layer are divided by weight, and the first permeable concrete layer includes 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water. The method for preparing permeable recycled concrete for urban streets and the construction method thereof, the composite permeable concrete layer composed of the first permeable concrete layer, the second permeable concrete layer, the third permeable concrete layer, and the reinforcing structure has excellent water absorption, drainage, and water purification capabilities, and its water permeability, compressive strength, and durability are greatly improved relative to traditional concrete layers.

Description

Technical Field

[0001] The invention relates to the technical field of concrete preparation, and in particular to a construction method of permeable recycled concrete for urban streets. Background Art

[0002] In the process of rapid urbanization, many urban roads are covered with reinforced concrete structures and impermeable materials. Ordinary concrete pavements are impermeable, thus blocking the circulation between rainwater and groundwater, causing the groundwater level to drop. To solve the above problems, technicians have developed permeable concrete. Permeable concrete, also known as porous concrete, sandless concrete, and permeable flooring, is a porous lightweight concrete made of aggregate, cement, reinforcing agent, and water. It has the characteristics of air permeability, water permeability and light weight, which can well solve the problem of impermeable concrete pavements. However, the production of permeable concrete is difficult. Compared with ordinary concrete, its production cost is higher. Therefore, in order to reduce the cost, the technicians have proposed that the recycled aggregate obtained by crushing, cleaning, grading and mixing discarded concrete in a certain proportion can be used to replace the natural stone to make coarse aggregate, thereby reducing the exploitation of natural stone. However, in fact, the permeable concrete prepared by relying on recycled aggregate has a low use intensity and cannot meet the actual use needs. Therefore, this has caused an irreconcilable contradiction. In order to solve the above series of problems, the present invention will propose a method for preparing permeable recycled concrete for urban streets and a construction method thereof. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides a permeable recycled concrete construction method for urban streets, which solves the problems raised in the above-mentioned background technology.

[0005] (II) Technical solution

[0006] The present invention provides the following technical solution: a permeable recycled concrete construction method for urban streets, comprising a first permeable concrete layer, a second permeable concrete layer being fixedly connected to the top surface of the first permeable concrete layer, and a third permeable concrete layer being fixedly connected to the top surface of the second permeable concrete layer, wherein the constituent materials of the first permeable concrete layer are divided by weight, and the constituent materials thereof include 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water, and the constituent materials of the second permeable concrete layer are divided by weight, and the constituent materials thereof include 260-420 parts of cement, 150-170 parts of fly ash, 900-1100 parts of recycled aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, 80-120 parts of water, and 65-95 parts of silica fume.

[0007] Preferably, a reinforcement structure is provided between the bottom surface of the third permeable concrete layer and the top surface of the first permeable concrete layer, and the reinforcement structure is fixedly sleeved inside the second permeable concrete layer.

[0008] Preferably, the third permeable concrete layer, the reinforcement structure and the first permeable concrete layer are made of the same material.

[0009] Preferably, the coarse aggregate inside the first permeable concrete layer is made of natural rock crushing, and the particle size of the coarse aggregate is 4.75mm-6mm.

[0010] Preferably, the second permeable concrete layer has the same thickness as the first permeable concrete layer, and the thickness of the first permeable concrete layer is equal to twice the thickness of the third permeable concrete layer.

[0011] Preferably, the recycled aggregate inside the second permeable concrete layer is made by recycling waste concrete, and the particle size of the recycled aggregate is 6mm-10mm.

[0012] A permeable recycled concrete construction method for urban streets, comprising the following steps:

[0013] S1, respectively preparing the first permeable concrete layer, the third permeable concrete layer, the raw materials of the reinforcement structure, and the raw materials of the second permeable concrete layer, and then preparing them separately;

[0014] S2, after the raw material preparation is completed, the raw materials consisting of 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water are added to a forced mixer twice, the cement, fly ash, and coarse aggregate are added to a forced mixer for the first time, and then the forced mixer is turned on for stirring. After stirring evenly, stabilizer, reinforcing agent and water are added, and then stirring is continued until stirring evenly and standby;

[0015] S3. Similarly, raw materials consisting of 260-420 parts of cement, 150-170 parts of fly ash, 900-1100 parts of recycled aggregate, 7-11 parts of fortifier, 6-10 parts of stabilizer, 80-120 parts of water, and 65-95 parts of silica fume are added to another forced mixer twice. For the first time, cement, fly ash, recycled aggregate, and silica fume are added to another forced mixer, and then the forced mixer is turned on for mixing. After stirring evenly, stabilizer, fortifier, and water are added, and then stirring is continued until stirring evenly and standby;

[0016] S4. After the above two types of permeable concrete raw materials are made, the designated urban roads are paved, specifically: first, multiple sets of hollow tube molds are used to receive the permeable concrete raw materials made in S2, and the molds are removed after drying and hardening, thereby obtaining multiple sets of reinforcement structures. Then, the roadbed to be paved is wetted with water, and then the permeable concrete raw materials made in S2 are flattened on the roadbed surface by paving equipment to form a first permeable concrete layer. Subsequently, a flat plate vibrator is used to level the top surface of the first permeable concrete layer, and before the first permeable concrete layer is dried, multiple sets of reinforcement structures are equidistantly arranged on the top surface of the first permeable concrete layer, so that the reinforcement structures are stably connected to the first permeable concrete layer during the drying and hardening process of the first permeable concrete layer.

[0017] S5, then using paving equipment to spread the permeable concrete raw material made in S3 on the top surface of the first permeable concrete layer, and the paving thickness is based on the buried reinforcement structure, thereby forming a second permeable concrete layer, and then using a flat plate vibrator to level the top surface of the second permeable concrete layer;

[0018] S6. After the second permeable concrete layer is dried and hardened, the final paving operation is carried out. The permeable concrete raw materials made in S2 are spread on the roadbed surface using paving equipment to form a third permeable concrete layer. A flat vibrator is used to level the top surface of the third permeable concrete layer, and then a solid steel pipe or a light roller is used to press the entire layer flat.

[0019] (III) Beneficial effects

[0020] The present invention has the following beneficial effects:

[0021] 1. The composite permeable concrete layer prepared by the permeable recycled concrete construction method for urban streets uses a first permeable concrete layer, a third permeable concrete layer, and a reinforced structure with high strength as a frame, and a second permeable concrete layer with slightly lower strength as a middle filler, thereby saving construction costs while ensuring that the overall structure meets actual use needs, and preparing waste concrete into recycled aggregate, which is used in the overall structure through mix ratio design, effectively solving the problem of difficult disposal of construction waste, reducing the exploitation and use of natural resources such as sand and stone, and achieving the purpose of improving the ecological environment.

[0022] 2. The composite permeable concrete layer composed of the first permeable concrete layer, the second permeable concrete layer, the third permeable concrete layer and the reinforced structure provided by the permeable recycled concrete construction method for urban streets has excellent water absorption, drainage and water purification capabilities, and its permeability, compressive strength, flexural strength and durability are greatly improved compared with traditional concrete layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic cross-sectional view of the structure of the present invention;

[0024] In the figure: 1. first permeable concrete layer; 2. second permeable concrete layer; 3. third permeable concrete layer; 4. reinforced structure. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 A permeable recycled concrete construction method for urban streets, comprising a first permeable concrete layer 1, a second permeable concrete layer 2 is fixedly connected to the top surface of the first permeable concrete layer 1, and a third permeable concrete layer 3 is fixedly connected to the top surface of the second permeable concrete layer 2, a reinforcing structure 4 is arranged between the bottom surface of the third permeable concrete layer 3 and the top surface of the first permeable concrete layer 1, and the reinforcing structure 4 is fixedly sleeved inside the second permeable concrete layer 2, the third permeable concrete layer 3, the reinforcing structure 4, and the first permeable concrete layer 1 are made of the same material, the second permeable concrete layer 2 is the same as the first permeable concrete layer 1 in thickness, and the first permeable concrete layer 1 is twice as thick as the third permeable concrete layer 3, and the constituent materials of the first permeable concrete layer 1 are divided by weight. The first permeable concrete layer 1 is made of natural rock crushing, and the particle size of the coarse aggregate is 4.75mm-6mm. The constituent materials of the second permeable concrete layer 2 are divided by weight, and include 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of fortifier, 6-10 parts of stabilizer, 80-120 parts of water, and 65-95 parts of silica fume. The recycled aggregate in the second permeable concrete layer 2 is recycled from waste concrete, and the particle size of the recycled aggregate is 6mm-10mm.

[0027] A permeable recycled concrete construction method for urban streets, comprising the following steps:

[0028] S1, respectively prepare the raw materials of the first permeable concrete layer 1, the third permeable concrete layer 3, the reinforcing structure 4 and the raw materials of the second permeable concrete layer 2, and then prepare them separately;

[0029] S2, after the raw material preparation is completed, the raw materials consisting of 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water are added to a forced mixer twice, the cement, fly ash, and coarse aggregate are added to a forced mixer for the first time, and then the forced mixer is turned on for stirring. After stirring evenly, stabilizer, reinforcing agent and water are added, and then stirring is continued until stirring evenly and standby;

[0030] S3. Similarly, raw materials consisting of 260-420 parts of cement, 150-170 parts of fly ash, 900-1100 parts of recycled aggregate, 7-11 parts of fortifier, 6-10 parts of stabilizer, 80-120 parts of water, and 65-95 parts of silica fume are added to another forced mixer twice. For the first time, cement, fly ash, recycled aggregate, and silica fume are added to another forced mixer, and then the forced mixer is turned on for mixing. After stirring evenly, stabilizer, fortifier, and water are added, and then stirring is continued until stirring evenly and standby;

[0031] S4, after the above two kinds of permeable concrete raw materials are made, the designated urban roads are paved, specifically: first, multiple sets of hollow tube molds are used to receive the permeable concrete raw materials made in S2, and the molds are demoulded after drying and hardening, thereby obtaining multiple sets of reinforcing structures 4, then the roadbed to be paved is wetted with water, and then the permeable concrete raw materials made in S2 are flattened on the roadbed surface by paving equipment, thereby forming a first permeable concrete layer 1, and then the top surface of the first permeable concrete layer 1 is leveled by a flat plate vibrator, and before the first permeable concrete layer 1 is dried, multiple sets of reinforcing structures 4 are equidistantly arranged on the top surface of the first permeable concrete layer 1, so that the reinforcing structures 4 are stably connected to the first permeable concrete layer 1 during the drying and hardening process of the first permeable concrete layer 1;

[0032] S5, then using paving equipment to lay the permeable concrete raw material made in S3 on the top surface of the first permeable concrete layer 1, and the laying thickness is based on the buried reinforcement structure 4, thereby forming a second permeable concrete layer 2, and then using a flat plate vibrator to level the top surface of the second permeable concrete layer 2;

[0033] S6. After the second permeable concrete layer 2 is dried and hardened, the final paving operation is carried out. The permeable concrete raw materials made in S2 are spread on the roadbed surface using paving equipment to form a third permeable concrete layer 3. A flat plate vibrator is used to level the top surface of the third permeable concrete layer 3, and then a solid steel pipe or a light roller is used to press the entire surface.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for constructing permeable recycled concrete for urban streets, characterized in that: The invention comprises a first permeable concrete layer (1), the top surface of the first permeable concrete layer (1) being fixedly connected to a second permeable concrete layer (2), and the top surface of the second permeable concrete layer (2) being fixedly connected to a third permeable concrete layer (3), wherein the first permeable concrete layer (1) comprises, by weight, 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water, and the second permeable concrete layer (2) comprises, by weight, 260-420 parts of cement, 150-170 parts of fly ash, 900-1100 parts of recycled aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, 80-120 parts of water, and 65-95 parts of silica fume; A reinforcing structure (4) is provided between the bottom surface of the third permeable concrete layer (3) and the top surface of the first permeable concrete layer (1), and the reinforcing structure (4) is fixedly sleeved inside the second permeable concrete layer (2); the third permeable concrete layer (3), the reinforcing structure (4) and the first permeable concrete layer (1) are made of the same material; the coarse aggregate inside the first permeable concrete layer (1) is made from crushed natural rocks, and the coarse aggregate particle size is 4.75 mm-6 mm; the second permeable concrete layer (2) has the same thickness as the first permeable concrete layer (1), and the thickness of the first permeable concrete layer (1) is equal to twice the thickness of the third permeable concrete layer (3); the recycled aggregate inside the second permeable concrete layer (2) is made from recycled waste concrete, and the recycled aggregate particle size is 6 mm-10 mm; The steps include: S1, respectively preparing raw materials for the first permeable concrete layer (1), the third permeable concrete layer (3), the reinforcing structure (4) and the raw materials for the second permeable concrete layer (2), and then preparing them separately; S2, after the raw material preparation is completed, the raw materials consisting of 260-420 parts of cement, 150-170 parts of fly ash, 1000-1200 parts of coarse aggregate, 7-11 parts of reinforcing agent, 6-10 parts of stabilizer, and 80-120 parts of water are added to a forced mixer twice, the cement, fly ash, and coarse aggregate are added to a forced mixer for the first time, and then the forced mixer is turned on for stirring. After stirring evenly, stabilizer, reinforcing agent and water are added, and then stirring is continued until stirring evenly and standby; S3, the components of cement 260-420 parts, fly ash 150-170 parts, recycled aggregate 900-1100 parts, strengthener 7-11 parts, stabilizer 6-10 parts, water 80-120 parts, silica fume 65-95 parts of raw materials are also added to another forced mixer twice, the first time cement, fly ash, recycled aggregate, silica fume are added to another forced mixer, and then the forced mixer is turned on for stirring, and after stirring evenly, stabilizer, strengthener and water are added, and then stirring is continued until stirring evenly and standby; S4, after the above two types of permeable concrete raw materials are made, the designated urban roads are paved, specifically: first, multiple sets of hollow tube molds are used to receive the permeable concrete raw materials made in S2, and after drying and hardening, the molds are removed to obtain multiple sets of reinforcement structures (4), then the roadbed to be paved is wetted with water, and then the permeable concrete raw materials made in S2 are flattened on the roadbed surface by paving equipment to form a first permeable concrete layer (1), and then the top surface of the first permeable concrete layer (1) is leveled by a flat plate vibrator, and before the first permeable concrete layer (1) is dried, multiple sets of reinforcement structures (4) are arranged equidistantly on the top surface of the first permeable concrete layer (1), so that the reinforcement structures (4) are stably connected to the first permeable concrete layer (1) during the drying and hardening process of the first permeable concrete layer (1); S5, then using paving equipment to spread the permeable concrete raw material made in S3 on the top surface of the first permeable concrete layer (1), and the paving thickness is based on the buried reinforcement structure (4), thereby forming a second permeable concrete layer (2), and then using a flat plate vibrator to level the top surface of the second permeable concrete layer (2); S6. After the second permeable concrete layer (2) is dried and hardened, the final paving operation is carried out. The permeable concrete raw material prepared in S2 is spread evenly on the roadbed surface using paving equipment to form a third permeable concrete layer (3). A flat plate vibrator is used to level the top surface of the third permeable concrete layer (3), and then a solid steel pipe or a light roller is used to flatten the entire layer.

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