Alkali-silica reaction (ASR) in the alkali-activated cement (AAC) system: A state-of-the-art review
Alkali-silica reaction (ASR) in the alkali-activated cement (AAC) system: A state-of-the-art review
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DOI：
10.1016/j.conbuildmat.2020.119105
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发表时间：
2020-08
影响因子：
7.4
通讯作者：
Wei Wang;T. Noguchi
中科院分区：
文献类型：
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作者：
Wei Wang;T. Noguchi
碱激发水泥因其比传统普通波特兰水泥（OPC）能耗低、对环境影响小而受到世界各国的关注，但通常用于激发的高碱度激发剂会引起ASR劣化，限制了其商业应用。本文综述了碱激发砂浆或混凝土中ASR的研究进展。除了骨料，激发剂和粘合剂的影响，现有的测试和缓解方法的基础上开发的OPC系统的适用性进行了讨论。总体而言，与低钙AAC系统相比，高钙系统和混合系统更容易遭受ASR诱导的膨胀。结合料化学组成、集料性质、碱激发剂用量和硅酸盐模数对AAC体系中ASR性能的影响是相互依赖的。然而，关于AAC系统中ASR行为的研究还存在许多问题，需要更多的研究来全面系统地研究，以了解AAC系统中ASR的基本机制，填补知识空白。
Although alkali-activated cement has received worldwide attention due to its lower energy consumption and environmental impact than that of traditional ordinary Portland cement (OPC), high alkalinity activators generally used for activation may cause ASR deterioration and limit its commercial use. This paper reviews the development of knowledge on ASR in alkali-activated mortars or concretes. Apart from the influence of aggregates, activators, and binders, the applicability of existing test and mitigation methods which were developed based on OPC system are also discussed. Overall, compared to low-calcium AAC system, high-calcium system and hybrid system are more likely to suffer from ASR-induced expansion. Effect of binder chemistry, aggregates properties, dosage and silicate modulus of alkali-activators on the performance of ASR in AAC system are interdependent to each other. However, there still exist many questions on the ASR behavior in the AAC system, and this needs more studies to comprehensively and systematically investigate them to understand the fundamental mechanism of ASR in the AAC system and bridge the knowledge gaps.