通过CDW上循环开发生态混合式基于水泥的绿色混凝土的开发:机械性能和环境概况分析分析
Emircan Ozcelikci1, Mingming Hu2, Mustafa Sahmaran3
1Institute of Science, Hacettepe University, Beytepe, Ankara, Turkey; Institute of Environmental Sciences, Leiden University, Leiden, 2300, RA, Netherlands.
Journal of environmental management
|February 22, 2025
概括
这项研究使用建筑和拆除废物 (CDW) 开发了一种绿色混凝土,达到43.8MPa的强度,并将环境影响降低高达42%. 这种创新的生态混合水泥支持建筑中的循环经济原则.
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:
- 建筑和拆除废物 (CDW) 带来了重大的环境挑战.
- 目前的CDW管理通常涉及垃圾填埋或有限的回收利用.
- 越来越需要符合循环经济原则的可持续建筑材料.
研究的目的:
- 开发一种新的绿色混凝土,在粘合剂和聚合物阶段使用CDW.
- 评估开发的绿色混凝土的机械性能和耐久性.
- 通过生命周期评估来评估绿色混凝土对环境的好处.
主要方法:
- 开发一种生态混合水泥,使用CDW,硫氨酸 (CSA) 水泥和波特兰水泥 (PC) 的三元混合物.
- 使用100%基于CDW的回收混凝土聚合物.
- 综合测试包括压力强度,干燥收缩,吸水,抗解,化物透性和生命周期评估.
主要成果:
- 绿色混凝土的28天压力强度为43.8MPa,适用于结构应用.
- 耐久性性能与传统的波特兰水泥混凝土相当.
- 生命周期评估显示,与PC相比,生态混合水泥的环境影响类别减少了29%-42%,全球变暖潜力降低了32%.
- 微结构分析证实了CDW对C-S-H凝形成的贡献.
结论:
- 开发的绿色混凝土有效地将CDW循环升级,将大约87.8%的废物物质按质量纳入.
- 生态混合水泥和绿色混凝土为传统混凝土提供了可持续的替代方案,减少了环境足迹.
- 这种方法表明,在循环经济框架内,用于建筑行业的CDW价值化是一个可行的途径.
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