Feasibility Study of Metakaolin-Based Geopolymer as Binder for Construction Mortar
Feasibility Study of Metakaolin-Based Geopolymer as Binder for Construction Mortar
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DOI：
10.1061/9780784483305.032
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
Oscar D. Huang;Nathaniel J. Lies;M. Radovic
中科院分区：
文献类型：
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作者：
Oscar D. Huang;Nathaniel J. Lies;M. Radovic
地聚合物是一种铝硅酸盐网状聚合物，近年来作为交通基础设施中普通硅酸盐水泥的环保替代品而引起了人们的兴趣。这种新型材料可以在环境条件下从废物和/或广泛可用的天然材料中加工而成。本研究采用不同SiO2/ al2o3比和水固比作为地聚合物粘结剂，对一套偏高岭土基地聚合物和含建筑砂的地聚合物砂浆进行综合处理，并在常温条件下固化14天。测试了纯地聚合物和地聚合物砂浆样品的抗压强度、密度和开孔率。结果表明，地聚合物的组成对其性能特别是抗压强度有很大影响。采用扫描电子显微镜（SEM）对不同成分的样品进行了表征，从组成参数的角度考察了形貌和结构的影响。
Geopolymer is an aluminosilicate network polymer that has gained interest in recent years as an eco-friendly alterative to ordinary Portland cement for transportation infrastructure. This novel material can be processed from waste and/or widely available natural materials under ambient conditions. In this study, a comprehensive set of metakaolin-based geopolymers and geopolymer mortars with construction sand were processed using different SiO2/Al2O3ratios and water/solid ratios for geopolymer binder and cured at ambient conditions for 14 days. Pure geopolymer and geopolymer mortar samples were tested for compressive strength, density, and open porosity. The results show that the composition of geopolymers strongly affects their properties especially their compressive strength. Samples with various compositions were characterized with scanning electron microscopy (SEM) to examine the morphological and structural effect from the compositional parameters.