再生微粉自流平砂浆性能及碳排放分析

doi:10.16552/j.cnki.issn1001-1625.2025.0022

摘要/Abstract

摘要： 废弃混凝土和废弃砖是建筑废弃物重要的组成部分,而建筑垃圾再生微粉的资源化利用是建筑领域实现碳减排的重要途径之一。因此,本文分别采用再生混凝土粉(RCP)和再生砖粉(RBP)替代部分水泥制备自流平砂浆(SLM),研究了RCP和RBP掺量对SLM流动性和强度的影响规律,并使用扫描电子显微镜、X射线衍射和氮气吸附法揭示SLM的微观机理。结果表明,掺入RCP和RBP降低了SLM的流动性,但RCP和RBP掺量分别为10%(质量分数)时,对SLM的流动性影响不大。当RBP掺量为10%(质量分数)时SLM强度最高,且内部结构最为致密。而RCP的掺入会对SLM的性能产生不利的影响。利用再生微粉替代部分水泥,有利于降低SLM制备过程中的碳排放,促进建筑业绿色可持续发展。

关键词: 再生微粉, 自流平砂浆, 流动性, 力学性能, 微观结构, 碳排放

Abstract: Waste concrete and waste bricks are the important components of construction waste, and the resource utilization of recycled powder from construction waste is one of the important ways to achieve carbon reduction in the construction industry. Therefore, in this paper, recycled concrete powder (RCP) and recycled brick powder (RBP) were used to replace part of cement to prepare self leveling mortar (SLM). The effects of RCP content and RBP content on the fluidity and compressive strength of SLM were studied, and the microscopic mechanism was revealed by scanning electron microscope, X-ray diffraction and nitrogen adsorption method. The results show that the addition of RCP and RBP reduces the fluidity of SLM, but when the content of RBP and RCP is 10% (mass fraction) respectively, it has little effect on the fluidity of SLM. When the RBP content is 10% (mass fraction), the strength of SLM is the highest and the internal structure is the densest. The addition of RCP can have an adverse effect on the properties of SLM. The use of recycled powder to replace part of the cement is beneficial for reducing carbon emissions during the SLM preparation and promoting green and sustainable development in the construction industry.

Key words: recycled powder, self leveling mortar, fluidity, mechanical property, microstructure, carbon emission

中图分类号:

TU528

夏陈晨, 徐浩, 周泽, 翟文强, 何智海. 再生微粉自流平砂浆性能及碳排放分析[J]. 硅酸盐通报, 2025, 44(4): 1477-1485.

XIA Chenchen, XU Hao, ZHOU Ze, ZHAI Wenqiang, HE Zhihai. Properties and Carbon Emission Analysis of Self Leveling Mortar with Recycled Powder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(4): 1477-1485.

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