This thesis introduces the action mechanism of fly ash in high performance concrete,its impact on concrete performance at each stage and possible unfavorable factors,explores the adaptability of large volume of fly ash in underwater concrete bored pile and attentions,with a view to guide practice and to guarantee construction quality of underwater bored pile.%介绍了粉煤灰在高性能混凝土中的作用机理、各阶段对混凝土性能的影响和可能产生的不利因素;探讨了水下灌注桩混凝土使用大掺量粉煤灰技术的适用性和应该注意的问题,以期指导实践,保证水下灌注桩施工质量。
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