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 PDFInfo
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- 239000002699 waste material Substances 0.000 title claims abstract description 19
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Abstract
本发明属于固体废弃物利用与生态工程建设技术领域,公开了一种废轮胎‑透水混凝土复合结构及其制备方法和应用。所述复合结构包括废轮胎和透水混凝土;所述废轮胎为整胎或沿整胎圆周方向剖开后的半片胎,在废轮胎内部以及轮胎内环侧形成的空腔均浇筑透水混凝土。本发明将废轮胎作为透水混凝土成型的模板,二者结合形成一种刚柔结合的复合结构,应用于边坡支护和休闲步道中,不仅能够满足工程强度和稳定性的要求,还能发挥废轮胎等固体废物的利用价值。The invention belongs to the technical field of solid waste utilization and ecological engineering construction, and discloses a waste tire-permeable concrete composite structure and its preparation method and application. The composite structure includes waste tires and permeable concrete; the waste tires are whole tires or half tires cut along the circumferential direction of the whole tire, and permeable concrete is poured in the cavities formed inside the waste tires and on the inner ring side of the tires. The invention uses waste tires as templates for forming permeable concrete, and combines the two to form a rigid-flexible composite structure, which is applied to slope support and leisure trails, not only meeting the requirements of engineering strength and stability, but also exerting The utilization value of solid waste such as waste tires.
Description
技术领域technical field
本发明属于固体废弃物利用与生态工程建设技术领域,具体涉及一种废轮胎-透水混凝土复合结构及其制备方法和应用。The invention belongs to the technical field of solid waste utilization and ecological engineering construction, and specifically relates to a waste tire-permeable concrete composite structure and its preparation method and application.
背景技术Background technique
废轮胎是交通运输工程领域产量很大的一项废弃物,处理不当将带来严重的环境问题和资源浪费。我国每年有大量的汽车轮胎被废弃,目前常使用的处理方法有翻新、囤积、焚烧和填埋。囤积的废弃轮胎会导致病虫害的滋生,而焚烧会释放有毒烟雾并为火灾埋下隐患,直接填埋废弃轮胎也会污染地下水。我国目前的轮胎综合利用率不到50%,综合利用大有前景可为。Scrap tires are a large amount of waste in the field of transportation engineering. Improper disposal will bring serious environmental problems and waste of resources. A large number of automobile tires are discarded every year in our country, and the commonly used disposal methods are refurbishment, hoarding, incineration and landfill. The hoarding of discarded tires will lead to the breeding of diseases and insect pests, while incineration will release toxic smoke and bury hidden dangers for fires, and directly burying discarded tires will also pollute groundwater. The current comprehensive utilization rate of tires in our country is less than 50%, and the comprehensive utilization has great prospects.
近年来,生态工程建设已成为城市建设中的重要环节,其中包括边坡支护和休闲步道修建等工程,这些工程是改善城市生态环境、提升城市绿色水平、丰富城市绿化景观的一种重要措施。传统的边坡支护和休闲步道修建大多采用钢筋、砌石、混凝土等硬性材料,不仅需要较高的成本,而且对于风化石质边坡的支护而言,边坡表面的风化剥落和积水崩坏给硬性材料的施工和耐久性带来了很大的挑战。因此,本发明提出一种废轮胎-透水混凝土复合结构,应用于边坡支护和休闲步道中,不仅能够解决上述问题,也能发挥废轮胎的利用价值,真正实现经济效益、环境效益和社会效益的协调统一。In recent years, ecological engineering construction has become an important link in urban construction, including projects such as slope support and leisure trail construction. These projects are an important measure to improve the urban ecological environment, enhance the urban green level, and enrich the urban green landscape. . Traditional slope support and leisure trail construction mostly use hard materials such as steel bars, masonry, concrete, etc., which not only requires high cost, but also for the support of weathered rocky slopes, the weathered spalling and accumulation on the slope surface Water collapse poses great challenges to the construction and durability of rigid materials. Therefore, the present invention proposes a waste tire-permeable concrete composite structure, which is applied to slope support and leisure trails. Harmonization of benefits.
发明内容Contents of the invention
本发明所要解决的技术问题是针对我国废轮胎利用率低以及传统边坡支护和休闲步道建设存在的问题,提供一种废轮胎-透水混凝土复合结构及其制备方法和应用,将废轮胎作为透水混凝土成型的模板,二者结合形成一种刚柔结合的复合结构,应用于边坡支护和休闲步道中,不仅能够满足工程强度和稳定性的要求,还能发挥废轮胎等固体废物的利用价值。The technical problem to be solved by the present invention is to provide a waste tire-permeable concrete composite structure and its preparation method and application in view of the low utilization rate of waste tires in my country and the problems existing in traditional slope support and leisure trail construction. The formwork formed by permeable concrete, the combination of the two forms a rigid-flexible composite structure, which is used in slope support and leisure trails. It can not only meet the requirements of engineering strength and stability, but also play the role of solid waste such as waste tires. use value.
为解决本发明所提出的技术问题,本发明提供一种废轮胎-透水混凝土复合结构,包括废轮胎和透水混凝土;废轮胎为整胎或沿整胎圆周方向剖开后的半片胎,在废轮胎内部以及轮胎内环侧形成的空腔均浇筑透水混凝土。In order to solve the technical problems proposed by the present invention, the present invention provides a waste tire-permeable concrete composite structure, including waste tires and permeable concrete; waste tires are whole tires or half tires cut along the circumferential direction of the whole tire. The cavity formed inside the tire and the inner ring side of the tire is poured with permeable concrete.
上述方案中,所述废轮胎为轿车外胎、客车外胎、载货汽车外胎中的一种,所用废轮胎的高度保持一致。In the above scheme, the waste tires are one of car tires, bus tires, and truck tires, and the heights of the waste tires used are consistent.
上述方案中,所述透水混凝土为以硅酸盐水泥、硫铝酸盐水泥、铝酸盐水泥、乳化沥青、硅铝质工业废渣中至少一种为胶凝材料制成的透水混凝土。In the above scheme, the permeable concrete is a permeable concrete made of at least one of Portland cement, sulphoaluminate cement, aluminate cement, emulsified asphalt, and silicon-aluminum industrial waste as a cementitious material.
上述方案中,所述透水混凝土的原料及质量份数包括:粗骨料1412-1669份、胶凝材料343-400份、水100-126份、减水剂7.4-8.7份,水胶比0.28-0.42。In the above scheme, the raw materials and mass parts of the permeable concrete include: 1412-1669 parts of coarse aggregate, 343-400 parts of cementitious material, 100-126 parts of water, 7.4-8.7 parts of water-reducing agent, and water-cement ratio of 0.28 -0.42.
本发明还提供一种废轮胎-透水混凝土复合结构的制备方法,包括以下步骤:The present invention also provides a method for preparing a waste tire-permeable concrete composite structure, comprising the following steps:
1)在搅拌容器中,将粗骨料和40-60%的水混合后搅拌均匀,再加入除水以外的全部原料再次搅拌均匀,最后将剩余水加入后搅拌均匀,得到透水混凝土;1) In a mixing container, mix coarse aggregate and 40-60% water and stir evenly, then add all raw materials except water and stir evenly again, finally add the remaining water and stir evenly to obtain permeable concrete;
2)将废轮胎放置于平面上,向废轮胎内部以及轮胎内环侧形成的空腔浇筑透水混凝土,浇筑完成后,养护成型,得到废轮胎-透水混凝土复合结构。2) Place the waste tires on a plane, pour permeable concrete into the cavity formed inside the waste tires and the inner ring side of the tires, and after the pouring is completed, cure and shape to obtain a waste tire-permeable concrete composite structure.
上述方案中,所述养护条件:温度20±2℃,相对湿度≥95%,养护7-28天。In the above scheme, the curing conditions: temperature 20±2°C, relative humidity ≥ 95%, curing for 7-28 days.
本发明还提供一种废轮胎-透水混凝土复合结构的应用,所述复合结构应用于边坡支护或休闲步道中。The invention also provides an application of a waste tire-permeable concrete composite structure, and the composite structure is applied to slope support or leisure trails.
上述方案中,所述复合结构应用于边坡支护时,复合结构中的废轮胎为沿整胎圆周方向剖开后的半片胎,复合结构在边坡坡面上的排布方式为:每三个复合结构的中心连线形成等边三角形,且复合结构之间紧密接触形成紧密嵌锁的结构。In the above scheme, when the composite structure is applied to slope support, the waste tires in the composite structure are half tires cut along the circumferential direction of the whole tire, and the arrangement of the composite structure on the slope surface is as follows: The connecting lines of the centers of the three composite structures form an equilateral triangle, and the close contact between the composite structures forms a tightly interlocked structure.
进一步地,所述边坡坡面上的障碍物和浮土浮石要预先清理干净。Further, the obstacles and pumice pumice on the slope of the slope should be cleaned up in advance.
进一步地,所述复合结构应用于土质边坡支护时,复合结构之间的嵌锁空隙内也浇筑透水混凝土。Further, when the composite structure is applied to soil slope support, permeable concrete is also poured in the interlocking spaces between the composite structures.
进一步地,所述复合结构应用于土质边坡支护时,在透水混凝土中种植灌木、草种、藤蔓中的至少一种,对坡面进行绿化。Further, when the composite structure is applied to soil slope support, at least one of shrubs, grass seeds, and vines is planted in the permeable concrete to green the slope.
进一步地,所述复合结构应用于石质边坡支护时,在边坡周边土壤中种植藤蔓,将藤蔓牵引到坡面上对坡面进行绿化。Further, when the composite structure is applied to rocky slope support, vines are planted in the soil around the slope, and the vines are pulled to the slope to green the slope.
上述方案中,所述复合结构应用于休闲步道时,复合结构中的废轮胎为整胎或沿整胎圆周方向剖开后的半片胎,将复合结构按步道既定轨迹依次排列放置在基层之上,构成休闲步道供行人行走。In the above scheme, when the composite structure is applied to leisure trails, the waste tires in the composite structure are whole tires or half-cut tires cut along the circumferential direction of the whole tire, and the composite structures are arranged and placed on the base layer according to the predetermined track of the trail , forming a leisure trail for pedestrians to walk on.
进一步地,所述休闲步道中复合结构的间距≤20cm。Further, the distance between the composite structures in the leisure walkway is ≤20cm.
与现有技术相比,本发明的有益效果为:Compared with prior art, the beneficial effect of the present invention is:
1)本发明的废轮胎-透水混凝土复合结构是一种刚柔结合的复合结构,废轮胎为透水混凝土提供了模板和相互柔性连接,透水混凝土具有强度高和耐久性好的特点,二者结合形成的结构有着非常可靠的稳定性,能够满足边坡支护和休闲步道的要求;同时,透水混凝土还具有良好的透水性,较大孔隙率以保证水流下渗和植物生长的需要,一方面很好地解决了休闲步道积水和风化石质边坡积水崩坏的问题,另一方面透水混凝土覆盖的土壤中可以种植绿植、进行绿化,从而实现功能与环境的协调统一。1) The waste tire-permeable concrete composite structure of the present invention is a rigid-flexible composite structure. The waste tire provides a template and a flexible connection for the permeable concrete. The permeable concrete has the characteristics of high strength and good durability. The combination of the two The formed structure has very reliable stability and can meet the requirements of slope support and leisure trails; at the same time, permeable concrete also has good water permeability and large porosity to ensure the needs of water infiltration and plant growth. It solves the problems of water accumulation on leisure trails and weathered stone slopes. On the other hand, green plants can be planted and greened in the soil covered by permeable concrete, so as to realize the coordination and unity of function and environment.
2)本发明解决了废弃轮胎的处理问题,使得大量的废弃轮胎可以在边坡支护工作中有很好的利用,大大提高了废弃轮胎的利用率;透水混凝土可以由固体废弃物制备,可实现多种固体废弃物的资源化利用,具有重要的经济和环境效益。2) The present invention solves the problem of disposal of waste tires, so that a large number of waste tires can be well utilized in slope support work, greatly improving the utilization rate of waste tires; permeable concrete can be prepared from solid waste, and can be Realizing the resource utilization of various solid wastes has important economic and environmental benefits.
3)本发明所涉及的施工方式便捷,施工成本低,易于推广。3) The construction method involved in the present invention is convenient, the construction cost is low, and it is easy to popularize.
附图说明Description of drawings
图1为本发明实施例1和实施例2复合结构的结构示意图。Fig. 1 is a structural schematic diagram of the composite structure of Example 1 and Example 2 of the present invention.
图2为本发明实施例3和实施例4复合结构的结构示意图。Fig. 2 is a structural schematic diagram of the composite structure of Example 3 and Example 4 of the present invention.
图3为本发明应用例1复合结构应用于石质边坡支护时的结构示意图。Fig. 3 is a structural schematic diagram of the application example 1 of the present invention when the composite structure is applied to rock slope support.
图4为本发明应用例2复合结构应用于土质边坡支护时的结构示意图。Fig. 4 is a structural schematic diagram of the application example 2 of the present invention when the composite structure is applied to soil slope support.
图5为本发明应用例3复合结构应用于休闲步道时的结构示意图。Fig. 5 is a structural schematic diagram of the application example 3 of the present invention when the composite structure is applied to a leisure trail.
具体实施方式Detailed ways
为了更好地理解本发明,下面结合实施例进一步阐明本发明的内容,但本发明的内容不仅仅局限于下面的实施例。In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.
以下实施例中,采用的废弃轮胎为轿车外胎。所用硅酸盐水泥、硫铝酸盐水泥、矿渣粉及粉煤灰均来自武汉华新水泥有限公司;钢渣为富平所生产的转炉钢渣(热焖法),其粒径为0~30mm;粗骨料来自武穴华新骨料有限公司,表观密度为2745kg/m3,压碎指标为9.7%;减水剂为武汉优博林聚羧酸高效减水剂,减水率为28%。In the following examples, the discarded tires used are car tires. The Portland cement, sulphoaluminate cement, slag powder and fly ash used are all from Wuhan Huaxin Cement Co., Ltd.; the steel slag is converter steel slag produced by Fuping (thermal braising method), and its particle size is 0-30mm; the coarse bone The material comes from Wuxue Huaxin Aggregate Co., Ltd., with an apparent density of 2745kg/m 3 and a crushing index of 9.7%; the water reducing agent is Wuhan Youbolin Polycarboxylate Superplasticizer with a water reducing rate of 28%.
表1各原料的主要化学组分(wt%)The main chemical components (wt%) of each raw material of table 1
实施例1-4Example 1-4
一种废轮胎-透水混凝土复合结构,包括废轮胎和透水混凝土;其中,实施例1和实施例2的复合结构如图1所示,废轮胎为沿整胎圆周方向剖开后的半片胎;实施例3和实施例4的复合结构如图2所示,废轮胎为整胎;在废轮胎内部以及轮胎内环侧形成的空腔均浇筑透水混凝土,透水混凝土的成分见表2。A waste tire-permeable concrete composite structure, including waste tires and permeable concrete; wherein, the composite structure of Embodiment 1 and Embodiment 2 is shown in Figure 1, and the waste tire is a half tire cut along the circumferential direction of the whole tire; The composite structure of Example 3 and Example 4 is shown in Figure 2. The waste tire is a whole tire; the cavity formed inside the waste tire and the inner ring side of the tire is poured with permeable concrete. The composition of the permeable concrete is shown in Table 2.
表2实施例1-4透水混凝土的成分(质量份数)The composition (mass parts) of table 2 embodiment 1-4 permeable concrete
实施例1-4中废轮胎-透水混凝土复合结构的制备方法,包括以下步骤:The preparation method of waste tire-permeable concrete composite structure in embodiment 1-4 comprises the following steps:
1)在搅拌容器中,将粗骨料和50%的水混合后搅拌均匀,使粗骨料表面得到有效清洗,有利于粗骨料与胶结材浆体的粘结,避免形成强度低的粘结过渡带;再加入除水以外的全部原料再次搅拌均匀,有助于形成稠度良好的浆体,在骨料间起润滑作用,避免骨料被挤碎,有利于搅拌,并能保证孔隙率;最后将剩余水加入后搅拌均匀,形成流动度适宜的浆体,均匀包裹在粗骨料表面,增大了粗骨料间的粘结面积,既保证了透水混凝土的连通孔隙率,又提高了强度,还改善了结构的整体稳定性,得到透水混凝土;1) In the mixing container, mix the coarse aggregate and 50% water and stir evenly, so that the surface of the coarse aggregate can be effectively cleaned, which is conducive to the bonding of the coarse aggregate and the cementitious material slurry, and avoids the formation of low-strength adhesive Tie the transition zone; then add all the raw materials except water and stir evenly again, which helps to form a slurry with good consistency, which acts as a lubricant between the aggregates, prevents the aggregates from being crushed, is conducive to stirring, and can ensure porosity ; Finally, add the remaining water and stir evenly to form a slurry with suitable fluidity, which is evenly wrapped on the surface of the coarse aggregate, increasing the bonding area between the coarse aggregate, which not only ensures the connected porosity of the permeable concrete, but also improves The strength is improved, the overall stability of the structure is also improved, and permeable concrete is obtained;
2)将废轮胎放置于平面上,向废轮胎内部以及轮胎内环侧形成的空腔浇筑透水混凝土,浇筑完成后,在温度20±2℃、相对湿度≥95%的条件下,养护7-28天硬化成型,得到废轮胎-透水混凝土复合结构。2) Place the waste tires on a plane, pour permeable concrete into the cavity formed inside the waste tires and the inner ring side of the tires, after pouring is completed, under the conditions of temperature 20±2°C and relative humidity ≥95%, curing for 7- After 28 days of hardening and molding, a waste tire-permeable concrete composite structure is obtained.
对复合结构中透水混凝土的性能进行测试,参照GB/T 50081-2019《混凝土物理力学性能试验方法标准》测试抗压强度;采用体积法测试孔隙率;采用多孔混凝土渗透仪测试渗透系数;结果见表3。The performance of permeable concrete in the composite structure is tested, and the compressive strength is tested with reference to GB/T 50081-2019 "Standards for Test Methods of Physical and Mechanical Properties of Concrete"; the porosity is tested by the volume method; the permeability coefficient is tested by the porous concrete permeability meter; the results are shown in table 3.
表3实施例1-4透水混凝土的性能测试结果The performance test result of table 3 embodiment 1-4 permeable concrete
从表3的结果可知,实施例1-4透水混凝土的7d和28d抗压强度都高于5.6MPa,可以满足边坡防护和休闲步道的强度要求;孔隙率在14.3-20.5%,可以实现充分透水和植物生长的功能;渗透系数在4.2-7.1mm/s,可以实现快速排水不积水。综上所述,各实施例的透水混凝土都能满足应用要求,在实际应用中,可以依实际情况进行选择。As can be seen from the results of table 3, the 7d and 28d compressive strengths of embodiment 1-4 pervious concrete are all higher than 5.6MPa, which can meet the strength requirements of slope protection and leisure trails; the porosity is 14.3-20.5%, which can fully The function of water permeability and plant growth; the permeability coefficient is 4.2-7.1mm/s, which can realize rapid drainage without water accumulation. To sum up, the permeable concrete of each embodiment can meet the application requirements, and in actual application, it can be selected according to the actual situation.
应用例1Application example 1
将实施例1的废轮胎-透水混凝土复合结构应用于石质边坡支护,应用方法为:将边坡坡面上的障碍物和浮土浮石预先清理干净,然后在边坡坡面上排布复合结构,如图3所示,复合结构在边坡坡面上的排布方式为:每三个复合结构的中心连线形成等边三角形,且复合结构之间紧密接触形成紧密嵌锁的结构,如此反复,直至整个坡面支护完成。在边坡周边土壤中种植藤蔓,将藤蔓牵引到坡面上对坡面进行绿化。The waste tire-permeable concrete composite structure in Example 1 is applied to rocky slope support, and the application method is: pre-clear the obstacles and pumice pumice on the slope surface, and then arrange them on the slope surface Composite structures, as shown in Figure 3, are arranged in such a way that the composite structures are arranged on the slope surface: the connecting lines of the centers of every three composite structures form an equilateral triangle, and the close contact between the composite structures forms a tightly interlocked structure , and so on, until the entire slope support is completed. Plant vines in the soil around the slope, and pull the vines to the slope to green the slope.
应用例2Application example 2
将实施例2的废轮胎-透水混凝土复合结构应用于土质边坡支护,应用方法为:将边坡坡面上的障碍物和浮土浮石预先清理干净,然后在边坡坡面上排布复合结构,如图4所示,复合结构在边坡坡面上的排布方式为:每三个复合结构的中心连线形成等边三角形,且复合结构之间紧密接触形成紧密嵌锁的结构,在嵌锁空隙内浇筑透水混凝土,如此反复,直至整个坡面支护完成。在透水混凝土中种植灌木、草种或藤蔓,对坡面进行绿化。The waste tire-permeable concrete composite structure of Example 2 is applied to soil slope support, and the application method is as follows: the obstacles and floating soil and pumice on the slope surface are cleaned up in advance, and then the composite structure is arranged on the slope surface. As shown in Figure 4, the arrangement of composite structures on the slope surface is as follows: the center line of every three composite structures forms an equilateral triangle, and the composite structures are in close contact to form a tightly interlocked structure. Pouring permeable concrete in the interlocking gap, and so on, until the entire slope support is completed. Plant shrubs, grass seeds or vines in pervious concrete to green slopes.
应用例3Application example 3
将实施例3的废轮胎-透水混凝土复合结构应用于休闲步道,应用方法为:如图5所示,将复合结构按步道既定轨迹依次排列放置在基层之上,复合结构的间距为≤20cm,构成休闲步道供行人行走。The waste tire-permeable concrete composite structure of Example 3 is applied to the leisure trail. The application method is as follows: as shown in Figure 5, the composite structure is arranged on the base layer according to the predetermined trajectory of the trail, and the distance between the composite structures is ≤ 20cm. Constitute a leisure trail for pedestrians to walk on.
上述实施例仅仅是为清楚地说明所作的实例,而并非对实施方式的限制。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动,这里无需也无法对所有的实施方式予以穷举,而因此所引申的显而易见的变化或变动仍处于本发明创造的保护范围之内。The above-mentioned embodiments are merely examples for clear illustration, and are not intended to limit the implementation. For those of ordinary skill in the art, on the basis of the above description, other different forms of changes or changes can be made, and it is not necessary and impossible to exhaustively list all the implementation modes here, and the obvious changes or Changes are still within the protection scope of the present invention.
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