椰壳灰对混凝土工作性、机械性能和碳体现的影响

桑托 什-, 阿德 耶米
巴基斯坦土木工程系

摘要

波特兰水泥是混凝土中使用的主要粘合剂，它的生产对二氧化碳排放的贡献很大，因此迫切需要寻找环境
友好型材料作为替代品。大多数发展中国家都有大量的农业废弃物，如椰子壳，这为探索如何将这些材料作为粘合
剂成分回收到混凝土中开辟了一条道路。大多数固体农业废弃物的燃烧会产生灰烬，可以用来替代波特兰水泥作为
混凝土的粘合剂。本文介绍了椰壳灰对混凝土的工作性、机械性能和含碳量的影响的实验研究结果。作者用椰壳灰
代替波特兰水泥共制作了五种混合物，比例最高为20%。本文的结果表明，椰壳灰可以被纳入混凝土混合物以减少
其内含碳。当用椰壳灰代替20%的波特兰水泥时，实现了约15%的内含碳减少。在混凝土混合物中加入椰壳灰也导
致了机械性能的提高，最高可替代10%的波特兰水泥。用10%的椰壳灰替代硅酸盐水泥的混合物的抗压、抗拉和抗
折强度比没有椰壳灰的对照混合物高12%、10%和9%。

关键词

混凝土；硅酸盐水泥；椰壳灰；可加工性；机械性能；碳的体现

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