CN115852992A - Waste tire-pervious concrete composite structure and preparation method and application thereof - Google Patents

Waste tire-pervious concrete composite structure and preparation method and application thereof Download PDF

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Publication number
CN115852992A
CN115852992A CN202211487778.0A CN202211487778A CN115852992A CN 115852992 A CN115852992 A CN 115852992A CN 202211487778 A CN202211487778 A CN 202211487778A CN 115852992 A CN115852992 A CN 115852992A
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tire
composite structure
pervious concrete
slope
waste
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沈卫国
余震
赵立
赵志成
张文贵
刘超
王亚楠
武苗苗
赵德强
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Abstract

The invention belongs to the technical field of solid waste utilization and ecological engineering construction, and discloses a waste tire-pervious concrete composite structure and a preparation method and application thereof. The composite structure comprises a scrap tire and pervious concrete; the waste tire is a whole tire or a half tire split along the circumferential direction of the whole tire, and pervious concrete is poured in cavities formed in the waste tire and on the inner ring side of the tire. The waste tire is used as a template for forming the pervious concrete, and the two templates are combined to form a rigid-flexible combined composite structure, so that the composite structure is applied to slope support and leisure footpath, not only can meet the requirements on engineering strength and stability, but also can exert the utilization value of solid wastes such as the waste tire and the like.

Description

Waste tire-pervious concrete composite structure and preparation method and application thereof
Technical Field
The invention belongs to the technical field of solid waste utilization and ecological engineering construction, and particularly relates to a waste tire-pervious concrete composite structure and a preparation method and application thereof.
Background
The waste tire is a waste with large yield in the field of traffic and transportation engineering, and serious environmental problems and resource waste are caused by improper treatment. A large amount of automobile tires are abandoned every year in China, and the treatment methods commonly used at present comprise renovation, stockpiling, burning and landfill. The stocked waste tires can cause the breeding of plant diseases and insect pests, and the burning can release toxic smog and bury hidden dangers for fire, and the direct landfill of the waste tires can pollute underground water. The comprehensive utilization rate of the current tires in China is less than 50%, and the comprehensive utilization rate is promising.
In recent years, ecological engineering construction has become an important link in urban construction, including slope support, leisure footpath construction and other projects, and these projects are important measures for improving urban ecological environment, improving urban green level and enriching urban greening landscape. Traditional slope support and leisure pavement construction mostly adopt rigid materials such as reinforcing steel bars, masonry, concrete and the like, high cost is needed, and in addition, for the support of weathered rocky slopes, the weathering spalling and the accumulated water collapse of the slope surfaces bring great challenges to the construction and durability of the rigid materials. Therefore, the invention provides a waste tire-pervious concrete composite structure, which is applied to slope support and leisure footpaths, not only can solve the problems, but also can exert the utilization value of the waste tire, and really realizes the coordination and unification of economic benefit, environmental benefit and social benefit.
Disclosure of Invention
The invention aims to solve the technical problems of low utilization rate of waste tires in China and the problems of traditional slope support and leisure footpath construction, and provides a waste tire-pervious concrete composite structure and a preparation method and application thereof.
In order to solve the technical problem provided by the invention, the invention provides a waste tire-pervious concrete composite structure, which comprises a waste tire and pervious concrete; the waste tire is a whole tire or a half tire split along the circumferential direction of the whole tire, and pervious concrete is poured in cavities formed in the waste tire and on the inner ring side of the tire.
In the scheme, the waste tire is one of a car cover tire, a passenger car cover tire and a cargo vehicle cover tire, and the heights of the used waste tires are kept consistent.
In the scheme, the pervious concrete is prepared by taking at least one of portland cement, sulphoaluminate cement, aluminate cement, emulsified asphalt and alumino-silicate industrial waste residues as a cementing material.
In the scheme, the pervious concrete comprises the following raw materials in parts by weight: 1412-1669 parts of coarse aggregate, 343-400 parts of cementing material, 100-126 parts of water, 7.4-8.7 parts of water reducing agent and 0.28-0.42 of water-to-glue ratio.
The invention also provides a preparation method of the waste tire-pervious concrete composite structure, which comprises the following steps:
1) Mixing the coarse aggregate and 40-60% of water in a stirring container, uniformly stirring, adding all the raw materials except water, uniformly stirring again, adding the rest water, and uniformly stirring to obtain the pervious concrete;
2) Placing the waste tire on a plane, pouring pervious concrete into a cavity formed in the waste tire and on the inner ring side of the tire, and curing and forming after pouring to obtain the waste tire-pervious concrete composite structure.
In the above scheme, the curing conditions are as follows: the temperature is 20 plus or minus 2 ℃, the relative humidity is more than or equal to 95 percent, and the curing is carried out for 7 to 28 days.
The invention also provides an application of the waste tire-pervious concrete composite structure, and the composite structure is applied to side slope support or a leisure footpath.
In the above scheme, when composite construction was applied to the side slope support, the scrap tire among the composite construction was for the half child after cutting open along whole child circumferencial direction, and the mode of arranging of composite construction on the slope surface of side slope is: the central connecting lines of every three composite structures form an equilateral triangle, and the composite structures are closely contacted to form a tightly-embedded and locked structure.
Furthermore, the obstacles and the pumice stones on the slope surface of the side slope need to be cleaned in advance.
Furthermore, when the composite structure is applied to soil slope support, pervious concrete is poured in interlocking gaps among the composite structures.
Furthermore, when the composite structure is applied to soil slope support, at least one of shrubs, grass seeds and vines is planted in pervious concrete to afforest the slope.
Furthermore, when the composite structure is applied to the stone slope support, the vines are planted in soil around the slope, and the vines are pulled to the slope surface to green the slope surface.
In the above scheme, when the composite structure is applied to the leisure footpath, the waste tires in the composite structure are whole tires or half tires split along the circumferential direction of the whole tires, and the composite structure is sequentially arranged on the base layer according to the established track of the footpath to form the leisure footpath for pedestrians to walk.
Furthermore, the distance between the composite structures in the leisure footpath is less than or equal to 20cm.
Compared with the prior art, the invention has the beneficial effects that:
1) The waste tire-pervious concrete composite structure is a rigid-flexible combined composite structure, the waste tire provides templates for pervious concrete and is mutually flexibly connected, the pervious concrete has the characteristics of high strength and good durability, and the structure formed by combining the waste tire and the pervious concrete has very reliable stability and can meet the requirements of side slope support and leisure footpath; meanwhile, the pervious concrete has good water permeability and large porosity so as to meet the requirements of water infiltration and plant growth, on one hand, the problem of collapse of water accumulation of a leisure footpath and water accumulation of a wind-caused slope is well solved, and on the other hand, green plants can be planted in soil covered by the pervious concrete for greening, so that the coordination and unification of functions and the environment are realized.
2) The invention solves the problem of processing the waste tires, so that a large amount of waste tires can be well utilized in the slope support work, and the utilization rate of the waste tires is greatly improved; the pervious concrete can be prepared from solid wastes, can realize resource utilization of various solid wastes, and has important economic and environmental benefits.
3) The construction method is convenient and fast, low in construction cost and easy to popularize.
Drawings
Fig. 1 is a schematic structural view of a composite structure according to embodiments 1 and 2 of the present invention.
Fig. 2 is a schematic structural diagram of a composite structure according to embodiments 3 and 4 of the present invention.
Fig. 3 is a schematic structural view of the composite structure of application example 1 of the present invention applied to a rocky slope support.
Fig. 4 is a schematic structural view of the composite structure of application example 2 of the present invention applied to soil slope support.
Fig. 5 is a schematic structural view of the composite structure of application example 3 of the present invention applied to a leisure walkway.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the used waste tires are car casings. The silicate cement, the sulphoaluminate cement, the slag powder and the fly ash are all from Wuhanhua Xin cement GmbH; the steel slag is converter steel slag (hot stewing method) produced by Fuping, and the grain diameter of the steel slag is 0-30 mm; the coarse aggregate is from New bone Material of Wushuhua, inc., and has apparent density of 2745kg/m 3 The crush index was 9.7%; the water reducing agent is the polycarboxylic acid high efficiency of Wuhan YoubulinThe water reducing agent has a water reducing rate of 28 percent.
TABLE 1 main chemical composition of each raw material (wt%)
Raw materials SiO 2 Al 2 O 3 Fe 2 O 3 CaO MgO Na 2 O P 2 O 5 K 2 O TiO 2 SO 3
Portland cement 21.57 6.53 5.36 59.95 3.17 - - - - 1.8
Sulphoaluminate cement 9.46 32.46 2.86 42.23 2.49 - - - 1.59 7.89
Steel slag 15.57 3.90 23.87 36.45 7.27 0.22 2.21 - 1.46 0.73
Slag powder 30.34 13.88 0.592 38.45 8.255 0.611 - 0.558 0.809 2.854
Fly ash 46.97 35.09 5.05 4.82 0.69 - - - 1.61 3.52
Examples 1 to 4
A scrap tire-pervious concrete composite structure comprises a scrap tire and pervious concrete; wherein, the composite structure of the embodiment 1 and the embodiment 2 is shown in figure 1, the waste tire is a half-sheet tire cut along the circumferential direction of the whole tire; the composite structures of examples 3 and 4 are shown in fig. 2, with the scrap tire being a whole tire; pervious concrete is poured into cavities formed in the waste tire and on the inner ring side of the tire, and the components of the pervious concrete are shown in table 2.
Table 2 examples 1-4 compositions (parts by mass) of pervious concrete
Figure BDA0003957285740000041
The method for preparing the waste tire-pervious concrete composite structure in examples 1 to 4 comprises the following steps:
1) In a stirring container, mixing the coarse aggregate with 50% of water, and then uniformly stirring to effectively clean the surface of the coarse aggregate, so that the bonding of the coarse aggregate and the cementing material slurry is facilitated, and a bonding transition zone with low strength is avoided; all the raw materials except water are added and stirred uniformly again, which is favorable for forming slurry with good consistency, plays a role in lubricating aggregate, prevents the aggregate from being crushed, is favorable for stirring and can ensure the porosity; finally, adding the residual water, uniformly stirring to form slurry with proper fluidity, uniformly wrapping the slurry on the surface of the coarse aggregates, increasing the bonding area among the coarse aggregates, ensuring the communication porosity of the pervious concrete, improving the strength, improving the overall stability of the structure and obtaining the pervious concrete;
2) Placing the waste tire on a plane, pouring pervious concrete into a cavity formed in the waste tire and on the inner ring side of the tire, curing for 7-28 days at the temperature of 20 +/-2 ℃ and the relative humidity of more than or equal to 95% after pouring is finished, and hardening and forming to obtain the waste tire-pervious concrete composite structure.
Testing the performance of pervious concrete in the composite structure, and testing the compressive strength according to GB/T50081-2019 'test method standard for physical and mechanical properties of concrete'; testing the porosity by adopting a volume method; testing the permeability coefficient by adopting a porous concrete permeameter; the results are shown in Table 3.
Table 3 results of performance testing of pervious concrete of examples 1-4
Figure BDA0003957285740000042
Figure BDA0003957285740000051
From the results in Table 3, it can be seen that the compressive strengths of the pervious concrete of examples 1-4, both 7d and 28d, are higher than 5.6MPa, and can meet the strength requirements of slope protection and leisure footpaths; the porosity is 14.3-20.5%, and the functions of sufficient water permeability and plant growth can be realized; the permeability coefficient is 4.2-7.1mm/s, and quick water drainage without water accumulation can be realized. In summary, the pervious concrete of each embodiment can meet the application requirements, and in practical application, the pervious concrete can be selected according to the practical situation.
Application example 1
The scrap tire-pervious concrete composite structure in the embodiment 1 is applied to stone slope support, and the application method comprises the following steps: cleaning up barriers and pumice stones on the slope surface of the side slope in advance, and then arranging the composite structures on the slope surface of the side slope, as shown in fig. 3, the arrangement mode of the composite structures on the slope surface of the side slope is as follows: the central connecting line of every three composite structures forms an equilateral triangle, and the composite structures are closely contacted to form a closely-embedded and locked structure, and the steps are repeated until the whole slope surface is supported. And (4) planting vines in soil around the side slope, and drawing the vines to the slope surface to green the slope surface.
Application example 2
The waste tire-pervious concrete composite structure of the embodiment 2 is applied to soil slope support, and the application method comprises the following steps: cleaning up barriers and pumice stones on the slope surface of the side slope in advance, and then arranging the composite structures on the slope surface of the side slope, as shown in fig. 4, wherein the arrangement mode of the composite structures on the slope surface of the side slope is as follows: the central connecting lines of every three composite structures form an equilateral triangle, the composite structures are closely contacted to form a tightly embedded and locked structure, permeable concrete is poured in the embedded and locked gaps, and the steps are repeated until the whole slope surface is supported. Planting shrubs, grass seeds or vines in the pervious concrete to afforest the slope.
Application example 3
The scrap tire-pervious concrete composite structure of example 3 is applied to a leisure walkway, and the application method is as follows: as shown in figure 5, the composite structures are sequentially arranged on the base layer according to the set track of the footpath, and the distance between the composite structures is less than or equal to 20cm, so that the leisure footpath for the pedestrians to walk is formed.
The above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the present invention. Other variants and modifications will be apparent to those skilled in the art in light of the foregoing description, which are not necessarily exhaustive of all embodiments and are therefore clearly encompassed within the scope of the invention.

Claims (10)

1. A scrap tire-pervious concrete composite structure is characterized by comprising a scrap tire and pervious concrete; the waste tire is a whole tire or a half tire split along the circumferential direction of the whole tire, and pervious concrete is poured in cavities formed in the waste tire and on the inner ring side of the tire.
2. The scrap tire-pervious concrete composite structure of claim 1, wherein the scrap tire is one of a passenger car tire, or a truck tire.
3. The scrap tire-pervious concrete composite structure according to claim 1, wherein the pervious concrete is a pervious concrete made of at least one of portland cement, sulphoaluminate cement, aluminate cement, emulsified asphalt and alumino-silicate industrial waste residues as a cementitious material.
4. A method for preparing a scrap tire-pervious concrete composite structure according to any one of claims 1 to 3, comprising the steps of:
1) Mixing the coarse aggregate and 40-60% of water in a stirring container, uniformly stirring, adding all the raw materials except water, uniformly stirring again, adding the rest water, and uniformly stirring to obtain the pervious concrete;
2) And placing the waste tire on a plane, pouring pervious concrete into a cavity formed in the waste tire and on the inner ring side of the tire, and curing and forming after pouring to obtain the waste tire-pervious concrete composite structure.
5. Use of the scrap tire-pervious concrete composite structure according to claim 1, wherein the composite structure is used in slope support or leisure walks.
6. The use of the scrap tire-pervious concrete composite structure according to claim 5, wherein when the composite structure is applied to slope support, the scrap tire in the composite structure is a half tire split along the circumferential direction of the whole tire, and the arrangement mode of the composite structure on the slope surface of the slope is as follows: the central connecting lines of every three composite structures form an equilateral triangle, and the composite structures are closely contacted to form a tightly-embedded and locked structure.
7. The use of a scrap tire-pervious concrete composite structure according to claim 6, wherein when the composite structure is used in soil slope support, pervious concrete is also poured in the interlocking gaps between the composite structures.
8. The use of the scrap tire-pervious concrete composite structure according to claim 6, wherein the slope is greened by planting at least one of shrubs, grass seeds and vines in the pervious concrete when the composite structure is applied to soil slope support.
9. The use of the scrap tire-pervious concrete composite structure according to claim 6, wherein when the composite structure is used for rocky slope support, the vines are planted in soil around the slope, and are drawn to the slope surface to green the slope surface.
10. The use of the scrap tire-pervious concrete composite structure according to claim 5, wherein when said composite structure is applied to a leisure walkway, the scrap tire in the composite structure is a whole tire or a half tire split along the circumferential direction of the whole tire, and the composite structure is sequentially arranged on a base layer according to the determined track of the walkway to form the leisure walkway for pedestrians to walk.
CN202211487778.0A 2022-11-22 2022-11-22 Waste tire-pervious concrete composite structure and preparation method and application thereof Pending CN115852992A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2481161A1 (en) * 2003-10-03 2005-04-03 France Gabion Civil engineering structure, individual building element and reinforcement process for said structure
CN105254195A (en) * 2015-11-13 2016-01-20 山东大学 Junked tire recycled concrete composite material and complex and construction method thereof
CN107382358A (en) * 2017-07-24 2017-11-24 重庆大学 It is a kind of suitable for permeable alkali-slag concrete of Supporting Load Pavement and preparation method thereof
CN217580228U (en) * 2022-06-01 2022-10-14 交通运输部规划研究院 Flexible traceless side slope ecological protection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2481161A1 (en) * 2003-10-03 2005-04-03 France Gabion Civil engineering structure, individual building element and reinforcement process for said structure
CN105254195A (en) * 2015-11-13 2016-01-20 山东大学 Junked tire recycled concrete composite material and complex and construction method thereof
CN107382358A (en) * 2017-07-24 2017-11-24 重庆大学 It is a kind of suitable for permeable alkali-slag concrete of Supporting Load Pavement and preparation method thereof
CN217580228U (en) * 2022-06-01 2022-10-14 交通运输部规划研究院 Flexible traceless side slope ecological protection device

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