富硅低钙粉煤灰渣代替细骨料对砂浆混凝土性能影响分析

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中图分类号：TQ528 文献标志码：A 文章编号：1671-0460（2026）01-0042-05

Abstract：To alleviate the shortage of natural sand resources，using 0～30% fly ash instead of fine aggregate， the performance of concrete was tested by using slump，setting time， compressive strength，chloride ion penetration resistance and freeze-thawcycle as key performance indicators.Theresults indicated thatatflyash replacementrateof 15%-25% ，the slump of the concrete increased from 69.1mm to 76.7mm .Meanwhile， the 28-day compressive strengthimproved from 39.3MPa to 41.3MPa ，and the 9O-day compressive strength reached 48.7MPa Simultaneously， the electric flux of 28-day sample decreased from 2270C to 1762C .After100 freeze-thaw cycles， samples with 20% replacement rate maintained relative dynamic modulus of 90.2% and exhibited mass loss rate of only 1.26%

Key Words： Flyash; Fine aggregate replacement; Mechanical properties; Durability;Mixtures; Preparation; Stability

随着城市化进程与基础建设规模的不断扩大，混凝土需求量呈持续攀升趋势。（剩余6337字）