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The alkali-aggregate reaction (AAR) is an expansive chemical reaction that occurs in cementitious materials when certain minerals present in the aggregates react in the presence of water with the hydroxyl ions (OH−) and the alkalis present in the pore solution. In AAR there are generally included two reaction types: alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR), being the ACR extremely rare [1]. Due to the ASR prevalence, this type of AAR will be the focus in this document.

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Introduction

  • 章节

  • 发表日期：

    2025年

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  • Esperanza Menéndez Méndez,
  • António Santos Silva

摘要

The alkali-aggregate reaction (AAR) is an expansive chemical reaction that occurs in cementitious materials when certain minerals present in the aggregates react in the presence of water with the hydroxyl ions (OH−) and the alkalis present in the pore solution. In AAR there are generally included two reaction types: alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR), being the ACR extremely rare [1]. Due to the ASR prevalence, this type of AAR will be the focus in this document.