可持续的混合轻质聚合混凝土使用回收扩展聚乙烯
D González-Betancur1, Ary A Hoyos-Montilla1, Jorge I Tobón2
1Materials Research Group, Construction School, Faculty of Architecture, Universidad Nacional de Colombia, Medellin 050034, Antioquia, Colombia.
Materials (Basel, Switzerland)
|May 25, 2024
概括
这项研究使用循环扩展聚钢 (EPS) 和混合水泥开发了可持续的轻质混凝土 (LWAC). 新型LWAC显示强度提高和密度降低,符合结构标准.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 环境科学 环境科学
背景情况:
- 普通波特兰水泥 (OPC) 的生产是资源密集型的,对环境也很关心.
- 扩展聚乙烯 (EPS) 废物带来了重大的生态挑战.
- 轻质混凝土 (LWAC) 具有降低结构重量和改善绝缘的潜力.
研究的目的:
- 调查LWAC的机械行为,其中包括回收EPS和混合水泥基质.
- 用OPC和活性水泥 (AAC) 的混合物评估LWAC的性能.
- 评估这种可持续的LWAC在结构应用中的潜力.
主要方法:
- LWAC的配方包括35%的轻质聚合物 (LWA) (EPS和扩展粘土) 和65%的正常重量聚合物.
- 混凝土基质由30%的OPC和70%的AAC (飞和石灰基) 组成.
- 压缩强度,密度,X射线衍射 (XRD) 和富里埃变换红外光谱 (FTIR) 在28天的固化后被分析.
主要成果:
- 观察到压力强度有48.8%的改善,超过了ACI 213R-03标准.
- 密度降低了21.5%,这表明了潜在的成本节约和更好的绝缘.
- XRD和FTIR证实了C-S-H,C-(A) -S-H和N-A-S-H凝的形成,尽管无水产品表明反应速度较慢.
结论:
- 开发的混合LWAC显示了作为可持续结构材料的潜力,有效利用废弃EPS.
- 该材料符合结构轻质混凝土的要求,在强度,密度降低和绝缘方面具有优势.
- 建议对激活剂溶液剂量和固化条件进行进一步的研究,以优化机械性能.
关键词:
里埃变换红外光谱法 红外光谱法在X射线中,X射线的衍射效果是不同的.压力强度的压力强度是什么混合混凝土混凝土混凝土混凝土混凝土轻质聚合物聚合物是一种轻质聚合物.轻质聚合混凝土混凝土的重量较小.聚合物废弃物的聚合物废弃物.更多相关视频
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