建筑垃圾-粉煤灰双掺混凝土耐久性研究

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中图分类号：TU528.31 文献标志码：A 文章编号：1005-8249（2026）02-0029-07

DOI：10.19860/j.cnki.issn1005-8249.2026.02.005

Study on Durability of Concrete Mixed with Construction Waste and Fly Ash

YE Anli， WEI Riqiang

（Guangxi Yongzheng Construction Quality Test Co.， Ltd.， Nanning 530221， China）

Abstract：Studythedurabilityperformanceofrecycledconstructionwaste aggregateandflyash mixed concrete invarious harsh environments，explorethesynergisticmechanismofthetwo，andprovidetheoreticalbasisfortheresourceuilizationof industrialsolid waste.Prepareconcreteusingrecycledconstruction wasteaggregatesandflyashasdual admixturematerials， andsystematicallevaluateisdurabilityperformance under freze-thawcycles，salineenvironments，andacidicenvironments. The results showed that when the fly ash content was 15% ，the compressive strength of concrete was the highest，with a mass loss of only 0.02g and a corrosion resistance coefficient of 0.996 ，exhibiting the best corrosion resistance and long- term stability，and good durability. When the content of recycled aggregate is 30% ，the relative dynamic elastic modulus of concrete remainsatahighlevelinvariousharshenvironments，andthestructuralstabiltyisgod.Thereisasynergisticehancement effect between fly ash and recycled aggregate，and an appropriate amount of fly ash （ 15% ）can fill the interface pores of recycled aggregate to improve compactness ； Moderate recycled aggregate （ 30% ） can significantly improve frost resistance and corosionresistance.Flyashandrecycledaggregates haveasynergisticenhancement efect whenmixed inappropriateamounts， whichcan improve thecompactness，frostresistance，andcorosionresistanceofconcrete，andhavegood engineering application prospects.

Key words：construction waste；flyash；binary-blendedconcrete；durability；recycledagregate；relativeelastic modulus

材料科学

0 引言

传统混凝土制备技术存在资源消耗大、碳排放高、性能单一等问题，难以满足复杂工程环境对材料耐久性的严苛要求。（剩余8207字）