A Review of Mechanisms and Mitigation of Alkali-Silica Reaction

Abstract

The alkali-silica reaction (ASR) in concrete is a significant issue in civil engineering, affecting concrete structures worldwide, resulting in expensive maintenance and reconstruction. The presence of ASR in several concrete facilities around the world highlights the necessity for research into early detection and subsequent mitigation strategies in structures. This article aims to provide an extensive literature review of the recent and relevant studies on the reaction mechanisms, conditioning factors (e.g., reactive aggregates content, alkalis and soluble calcium source, humidity), and mitigation measures of ASR. Despite the major technical progress in understanding and preventing ASR, the need for further research is emphasized.