Abstract Microscopic studies on alkali-silica reaction (ASR) products revealed two distinct forms of solid ASR products. However, their chemical and morphological aspects have not been adequately understood. This study provides a new insight into the nanostructure of ASR products as examined by atomic force microscopy (AFM). Results reveals that the surface microscale morphology of the rosette-like ASR product is associated with the loss of surface water, and the granular ASR product is formed by the accumulation of nanoscale particles with a typical size of around thirty nanometers. Moreover, the application of AFM provides evidence for the fluid nature of the granular ASR product at high moisture content.

中文翻译：

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碱-二氧化硅反应产物的原子力显微镜表征以揭示其纳米结构和形成机制

摘要 碱硅反应 (ASR) 产物的显微研究揭示了两种不同形式的固体 ASR 产物。然而，它们的化学和形态方面尚未得到充分理解。这项研究为通过原子力显微镜 (AFM) 检查的 ASR 产品的纳米结构提供了新的见解。结果表明，玫瑰花状 ASR 产品的表面微观形态与地表水的流失有关，而粒状 ASR 产品是由典型尺寸约为 30 纳米的纳米级颗粒积累形成的。此外，AFM 的应用为粒状 ASR 产品在高水分含量下的流体性质提供了证据。