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Alkali-silica reaction (ASR) in the alkali-activated cement (AAC) system: A state-of-the-art review

機譯：堿 - 二氧化硅反應（ASR）在堿活化水泥（AAC）系統(tǒng)中：最先進的綜述

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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. (C) 2020 Elsevier Ltd. All rights reserved.
機譯：雖然由于其較低的能量消耗和環(huán)境影響而不是傳統(tǒng)的普通植物水泥（OPC），但堿活化水泥已經(jīng)受到全世界的關(guān)注，但通常用于活化的高堿度活化劑可能導致ASR惡化并限制其商業(yè)用途。本文綜述了在堿活性砂漿或混凝土中的ASR知識的發(fā)展。除了聚集體，活化劑和粘合劑的影響外，還討論了基于OPC系統(tǒng)開發(fā)的現(xiàn)有測試和緩解方法的適用性?？傮w而言，與低鈣AAC系統(tǒng)相比，高鈣系統(tǒng)和混合系統(tǒng)更有可能遭受ASR誘導的膨脹。粘合劑化學的影響，堿活化劑對AAC系統(tǒng)中ASR的性能的堿活化劑的聚集性，劑量和硅酸鹽模量是彼此相互依賴的。然而，關(guān)于AAC系統(tǒng)中的ASR行為仍存在許多問題，這需要更多的研究，以全面，并系統(tǒng)地調(diào)查它們以了解AAC系統(tǒng)中ASR的基本機制，并彌合知識差距。 （c）2020 elestvier有限公司保留所有權(quán)利。

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