One way of recycling waste materials such as tyres and glass is to use them in concrete. The effects of the simultaneous use of waste rubber particles (RPs) as a partial substitute for fine aggregate and glass powder (GP) as a partial substitute for cement on the workability and mechanical properties of concrete at ambient temperature and after exposure to high temperature (600°C) were investigated in this work. In total, 13 mixes were prepared. Except for the reference mix, all the other mixes contained a combination of RPs replacing fine aggregate at percentages of 5% or 10% by volume and GP replacing cement at percentages of 10%, 15% or 20%. Two different sizes of RPs were investigated (0.15–1 mm and 3–5 mm). Slump tests were carried out on the fresh concretes. Tests for compressive strength and tensile strength before and after thermal exposure, and tests for mass loss after exposure to elevated temperature were also carried out. To obtain an understanding of the behaviour of the waste materials in concrete, scanning electron microscopy and energy-dispersive X-ray spectroscopy were conducted. In terms of compressive and tensile strengths, of all the mixes containing RPs and GP, the best results were for the mix with 5% RPs of 3–5 mm and 10% GP.

中文翻译：

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废橡胶和玻璃粉作为细骨料和水泥替代品混凝土的力学和热性能

回收轮胎和玻璃等废料的一种方法是将它们用于混凝土中。同时使用废旧橡胶颗粒（RP）部分替代细骨料和玻璃粉（GP）部分替代水泥对常温和高温后混凝土和易性和力学性能的影响（ 600°C）在这项工作中进行了研究。总共制备了13种混合物。除参考配合比外，所有其他配合比均包含按体积百分比 5% 或 10% 的 RP 替代细骨料和按 10%、15% 或 20% 的 GP 替代水泥的组合。研究了两种不同尺寸的 RP（0.15-1 毫米和 3-5 毫米）。对新拌混凝土进行了坍落度试验。还进行了热暴露前后的压缩强度和拉伸强度测试，以及暴露于高温后的质量损失测试。为了了解混凝土中废料的行为，进行了扫描电子显微镜和能量色散 X 射线光谱分析。就压缩强度和拉伸强度而言，在所有含有 RP 和 GP 的混合物中，最好的结果是 5% 3-5 mm RP 和 10% GP 的混合物。