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首页> 外文期刊>Journal of Materials Science >Workability, mechanical properties, and chemical stability of a recycled tyre rubber-filled cementitious composite
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Workability, mechanical properties, and chemical stability of a recycled tyre rubber-filled cementitious composite

机译：再生轮胎橡胶填充水泥基复合材料的可加工性，机械性能和化学稳定性

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The workability and mechanical properties of mortar containing shredded automobile and truck tyres were evaluated. Two different shapes of rubber particles were used as constituents of mortar: (1) granules about 2 mm in diameter, and (2) shreds having two sizes which were, nominally, 5.5 mm x 1.2 mm and 10.8 mm x 1.8 mm (length x diameter). As expected, the geometry of the rubber particles influenced the fracture behaviour of rubber-containing mortar. The addition of rubber led to a decrease in flexural strength and plastic shrinkage cracking of mortar. The crack width and crack length due to plastic shrinkage were reduced for mortar containing the 10.8 x 1.8 mm rubber shreds compared with a mortar without shreds. The rheological properties of the mortar containing rubber shreds were comparable to those of a mortar without rubber and yielded lower plastic viscosity than a mortar containing 25.4 mm x 15 mu m (length x diameter) polypropylene fibres. The alkaline stability of rubber in mortar was also evaluated by immersing rubber shreds in NaOH and Ca(OH)(2) solutions for 4 mon and the results showed that there is less than 20% change in stress and strain value. The findings of the research suggest that automobile and truck tyres can be recycled by shredding and incorporating them into mortar and probably concrete for certain infrastructural applications. (C) 1998 Chapman & Hall. [References: 26]
机译：评估了含有研碎汽车轮胎和卡车轮胎的砂浆的可加工性和机械性能。两种不同形状的橡胶颗粒用作砂浆的成分：（1）直径约2 mm的颗粒，和（2）具有两种尺寸的切丝，名义上分别为5.5 mm x 1.2 mm和10.8 mm x 1.8 mm（长度x直径）。不出所料，橡胶颗粒的几何形状影响了含橡胶砂浆的断裂行为。橡胶的添加导致砂浆的挠曲强度和塑性收缩裂纹降低。与不含碎屑的砂浆相比，含有10.8 x 1.8 mm橡胶碎屑的砂浆的塑性收缩引起的裂缝宽度和裂缝长度减小。含有橡胶碎片的砂浆的流变性能与不含橡胶的砂浆的流变性能相当，并且比含有25.4 mm x 15μm（长度x直径）聚丙烯纤维的砂浆的流变性能更低。还通过将橡胶碎片在NaOH和Ca（OH）（2）溶液中浸泡4个月来评估橡胶在砂浆中的碱性稳定性，结果表明应力和应变值的变化小于20％。研究结果表明，汽车轮胎和卡车轮胎可以通过切碎并将其掺入砂浆和某些特定基础设施应用的混凝土中来回收。 （C）1998查普曼和霍尔。 [参考：26]

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