期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 398, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2023.132525
关键词
True sustainability; Repeated recycling; Construction and demolition waste; Cement consumption; Waste cementitious powder
The physical and chemical characteristics of recycled concrete powders (RCP) generated by repeated recycling of concrete were investigated, and their application as a partial replacement for cement in mortar was discussed. The study found that RCP became more porous, rough, and less dense with an increasing number of concrete recycling. The properties of mortar containing RCP decreased as a function of replacement ratio and the number of concrete recycling.
The utilization of fine powder generated from crushing for recycling construction waste is a challenging task for the transition to zero waste and sustainable development. This study investigated the physical and chemical characteristics of recycled concrete powders (RCP) generated by repeated recycling of concrete and discussed their application as a partial replacement for cement in mortar. RCPs smaller than 0.15 mm were obtained from three different generations of multi-recycled coarse aggregate concrete, respectively, which replaced cement by 10%, 20% and 30%. The results showed that the RCP became more porous, rough and less dense with an increasing number of concrete recycling. Consequently, the properties of mortar containing RCP decreased as a function of replacement ratio and the number of concrete recycling. By reducing the replacement ratio, the properties of mortar containing RCP obtained from second-generation concrete could be comparable to those of mortar containing RCP obtained from first-generation concrete. However, for mortar made with RCP obtained from third-generation concrete, even at a 10% replacement ratio, the performance was lower than that of the previous-generation mortar with 30% RCP, indicating the need for modification for proper utilization of RCP obtained from repeatedly recycled aggregate concrete.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据