Effective use of ground waste expanded perlite as green supplementary cementitious material in eco-friendly alkali activated slag composites
Effective use of ground waste expanded perlite as green supplementary cementitious material in eco-friendly alkali activated slag composites
复制标题
有效利用废弃膨胀珍珠岩作为环保型碱激活矿渣复合材料中的绿色辅助胶凝材料
DOI：
10.1016/j.jclepro.2018.12.118
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发表时间：
2019-03-10
影响因子：
11.1
通讯作者：
Xing, Feng
中科院分区：
文献类型：
--
作者：
Long, Wu-Jian;Tan, Xiao-Wen;Xing, Feng
碱矿渣复合材料（AASCs）的生产通常需要大量的矿渣，而废弃膨胀矿渣（WEP）是一种可用作建筑行业绿色辅助胶凝材料（SCM）的工业废弃物。在这项研究中，使用地面WEP作为一个可持续的替代渣AASCs的可行性进行了评估。本文研究了磨细水溶性植物纤维增强水泥（WEP-AASCs）的水化过程、力学性能和生态经济性能。结果表明，与不含WEP的AASCs相比，10、30和50体积% WEP的WEP-AASCs的28天抗压强度分别降低了2.4 MPa（4%）、7.3 MPa（12%）和9.4 MPa（16%）。热重分析结果表明，随着WEP添加量的增加，反应热和反应峰均降低。结合XRD和SEM分析发现，加入磨细的WEP并没有改变AASCs中的反应产物。基于经济和生态分析，与没有地面WEP的AASC相比，可以实现成本（6-19%），隐含能量（5-24%）和隐含CO2排放量（3.2-16%）的降低。因此，WEP适合用作AASCs中的SCM，并基于所确定的性能和可持续性提出了有前途的应用。(C)2018爱思唯尔有限公司版权所有。
The production of alkali activated slag composites (AASCs) generally requires a large amount of slag, and waste expanded perlite (WEP) is a type of industrial waste that can be used as green supplementary cementitious material (SCM) in the building industry. In this study, the feasibility of using ground WEP as a sustainable replacement for slag in AASCs was evaluated. The process of hydration, mechanical properties, and ecological and economic performance of the AASCs with ground WEP (WEP-AASCs) were investigated in this study. The results showed that the 28-day compressive strength of WEP-AASCs at 10, 30, and 50 vol% WEP decreased by 2.4 MPa (4%), 7.3 MPa (12%), and 9.4 MPa (16%), respectively, compared to AASCs without WEP. In addition, both the heat of reaction and reaction peak of WEP-AASCs by thermogravimetric analysis decreased with the increasing additions of ground WEP. Combined with the X-ray diffraction (XRD) and scanning electron microscope (SEM) of WEP-AASCs, it was found that the addition of ground WEP did not change the reaction products in the AASCs. Based on the economic and ecological analyses, reductions in cost (6-19%), embodied energy (5-24%), and embodied CO2 emissions (3.2-16%) can be achieved, compared to AASCs without ground WEP. Therefore, WEP is suitable for use as SCM in AASCs, and presents promising applications based on the identified performance and sustainability. (C) 2018 Elsevier Ltd. All rights reserved.