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Alkali-silica reaction in calcium aluminate cement mortars induced by deicing salts solutions
Road Materials and Pavement Design ( IF 3.7 ) Pub Date : 2021-04-30 , DOI: 10.1080/14680629.2021.1916573
Łukasz Kotwica 1 , Monika Malich 1
Affiliation  

Calcium aluminate cement (CAC) mortars and concrete may be used as high-performance repairing materials for pavement restoration in airfields and roads. During recent years alkali-silica reaction (ASR) was reported in Portland cement concrete subjected to the action of organic deicers. Present paper reports the results of the investigation on the influence of organic and inorganic alkali deicers on ASR potential in CAC mortars containing fused silica as model reactive aggregate. It was shown for the first time, that concentrated solutions of sodium and potassium acetates, as well as sodium chloride, can cause ASR in CAC mortars. Sodium and potassium acetate resulted in much larger expansions comparing to sodium chloride and sodium hydroxide solutions used as a reference. Differences in alkali-silica gel were found depending on the solution which samples were soaked in. It was shown that ASR could proceed in a system without calcium hydroxide and an external source of hydroxyl ions.



中文翻译:

除冰盐溶液引起的铝酸钙水泥砂浆中的碱-硅反应

铝酸钙水泥 (CAC) 砂浆和混凝土可用作机场和道路路面修复的高性能修补材料。近年来,在有机除冰剂作用下,硅酸盐水泥混凝土发生碱硅反应(ASR)的报道。本论文报告了有机和无机碱除冰剂对含有熔融二氧化硅作为模型反应骨料的 CAC 砂浆中 ASR 潜力的影响的调查结果。首次表明,醋酸钠和醋酸钾以及氯化钠的浓缩溶液会导致 CAC 砂浆中的 ASR。与用作参考的氯化钠和氢氧化钠溶液相比,醋酸钠和醋酸钾的膨胀要大得多。

更新日期:2021-04-30
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