粉煤灰掺量对高层建筑筏板基础混凝土损伤特性的影响

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中图分类号：TU528 文献标志码：A 文章编号：1005-8249（2025）03-0058-06

DOI：10.19860/j.cnki.issn1005-8249.2025.03.011

Abstract：Toimprove theperformanceofflyashconcreteforraftfoundationofhigh-risebuildings，fourtypesofconcrete specimenswithflyashcontent weredesignedtoanalyze theircompresive strength，resistance tochlorideionpenetration， resistance tocarbonation，anddamage characteristicsundercyclictests（freze-thawcycleandwet drycycle）.Theresearch results show that the compressve strength of concrete specimens with a fly ash content of 30% reaches its highest value at 56 days of age，which is 78.5MPa ； The minimum increase in electrical flux was observed after 6O days of immersion，from 642Cto 964C，demonstrating thebestresistance tochloride ion penetration；Atthesametime，thecarbonization depth remainedthelowestat9.7mmduring the6Odaycarbonizationcycle，demonstrating excelentresistancetocarbonization. Therefore， concrete specimens with a fly ash content of 30% exhibit significant advantages in compressive strength， resistance to chloride ion penetration，and resistance to carbonation，which can provide reference for similar projects.

Key words：high-risebuilding；raftfoundation；flyash；concrete；damage characteristics；anti-carbonization；cycle test; electric flux

作者简介：何蕾（1985一），女，本科，工程师，研究方向：建筑相关。（剩余7036字）