A chemo-damage model is proposed to predict the expansion caused by the alkali silica reaction (ASR). The model covers the formation of the pre-expansion gel driven by alkali and the swelling of the gel driven by water. The swelling capacity of the ASR gel is quantified by the sodium to calcium ratio in the pore solution. The bound alkali in the gel recycled by calcium is also considered in this model. Both external alkali supply and internal alkali released from aggregates are included. Several sets of experimental data are compared with the simulation results for the verification of the model.

中文翻译：

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碱二氧化硅反应引起混凝土膨胀的化学力学模型

提出了一种化学损伤模型来预测由碱二氧化硅反应（ASR）引起的膨胀。该模型涵盖了由碱驱动的预膨胀凝胶的形成以及由水驱动的凝胶的溶胀。ASR凝胶的溶胀能力通过孔溶液中的钠与钙之比来定量。在该模型中还考虑了钙通过钙循环利用的结合碱。包括外部碱供给和从聚集体释放的内部碱。将几组实验数据与仿真结果进行比较，以验证模型。