Abstract The study aims to investigate the influence of limestone calcined clay cement (LC3) on the alkali-silica reaction (ASR). Kinetics and sequence of ASR formation were monitored using the model reactant method. Accelerated mortar bar test (AMBT) was also conducted to evaluate the effect LC3 in the ASR expansion. 30 wt% replacement by flash calcined clay and limestone in binder reduced the mortar expansion lower than the limit of Australian Standard. From the model reactant method, the additional calcium rich phases in LC3 model reactant system seem to delay the ASR gel formation or produce high Ca/Si ASR products, relatively rigid C-S-H and C-A-S-H that has less expansive capability. The current results reveal the possibility to utilize model reactant experiments to monitor the formation sequence of ASR gels with the presence of calcined clay and limestone due to the consistent results observed between model reactant experiments and real LC3-based specimens.

中文翻译：

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石灰石煅烧粘土水泥 (LC3) 减轻碱硅反应

摘要 本研究旨在研究石灰石煅烧粘土水泥（LC3）对碱硅反应（ASR）的影响。使用模型反应物方法监测 ASR 形成的动力学和序列。还进行了加速砂浆棒测试 (AMBT) 以评估 LC3 在 ASR 扩展中的效果。粘结剂中用闪烧粘土和石灰石替代 30 wt%，使砂浆膨胀低于澳大利亚标准的限制。从模型反应物方法来看，LC3 模型反应物系统中额外的富钙相似乎延迟了 ASR 凝胶的形成或产生了高 Ca/Si ASR 产物、相对刚性的 CSH 和膨胀能力较低的 CASH。