混合循环聚合物混凝土混凝土的机械和耐久性表征
Rashid Hameed1, Muhammad Tahir2, Safeer Abbas1
1Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan.
Materials (Basel, Switzerland)
|April 13, 2024
概括
这项研究研究了混合循环聚合混凝土 (HRAC),使用循环混凝土聚合物 (RCAs) 和循环聚合物 (RBAs). 用飞灰取代20%的水泥,为混凝土和铺路铺路提供了可接受的机械性能和耐久性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 可持续建筑 可持续建筑
背景情况:
- 建筑和拆除废物 (CDW) 的回收对于可持续建筑至关重要.
- 不分离的CDW产生混合循环聚合物 (HRA),混凝土和含量各不相同.
- 研究混合循环聚合混凝土 (HRAC) 的特性对于其有效利用至关重要.
研究的目的:
- 为了评估HRAC的机械性能和耐久性,100%的天然聚合物被混合形式的回收聚合物 (RBA) 和回收混凝土聚合物 (RCAs) 取代.
- 评估飞灰作为部分水泥替代品对HRAC性能的影响.
- 确定HRAC适用于混凝土和铺路等应用的适用性.
主要方法:
- 一个分为两个阶段的实验计划:对48种混合物 (单一和混合RBA/RCA) 进行压力强度测试,然后对8种选定的HRAC混合物进行机械 (压力强度,破裂模量) 和耐用性 (吸水能力,抗酸/盐盐) 测试.
- 与使用天然聚合物的四种混凝土混合物进行比较.
- 飞灰在一些混合物中被用作部分水泥替代品.
主要成果:
- HRAC的压力强度受到RBA和RCA的比例的显著影响.
- 使用飞灰取代20%的水泥HRAC证明了可接受的机械性能 (压力强度,MOR).
- 同样的混合物表现出令人满意的耐用性,包括低吸水率和良好的抗酸性和盐水溶液的耐用性.
结论:
- 混合回收聚合混凝土混凝土 (HRAC) 可以成功地使用回收和混凝土聚合物的组合来生产.
- 用飞灰部分替换水泥 (高达20%),可以提高HRAC的机械性能和耐用性.
- 使用飞灰的HRAC是一种可行的可持续材料,用于制造混凝土和铺路板,有助于CDW回收工作.
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