桥梁大体积承台用粉煤灰/矿渣粉双掺配比优化研究

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中图分类号：TQ178;TU528.041 文献标志码：A

文章编号：1001-5922（2025）09-0061-04

Study on optimization of fly ash/mineral slag powder double mixing ratio for large-volume cushion cap for bridges

CHENG Xianfeng' ，LIU Yange² （1.Henan Jiaotou Engineering Management Consulting Co.，Ltd.，Zhengzhou 45Oo52，China ; 2.HenanProvince Highway Engineering Bureau Group Detection Technology Co.，Ltd.，Zhengzhou 45o052，China）

Abstract：Inorder toobtain the mixtureratioof low-hydration heat concretesuitable for the constructionof largevolume cushion capof bridges，the indoor heatof hydration testofflyash-slag powder-cement cementitious material was carriedout，andthe effcts of diffrentflyash-slag powdermixtures ontheconcrete properties werefurther studiedaccording to the testresults.Teresults showed thattheadditionofflyash and slag powder admixture to cement could significantlyreduce therelease of hydrationheatofcementitiousmaterials，and the hydration heatof cement cementitious materials was the lowest when double mixing 15% fly ash and 15% slag powder.A large proportion of flyash and slag powder could improve the working performance of concrete，reduce the release of hydration heat， and meet the requirements of 6O d concrete compressive strength.When 15% fly ash and 15% slag powder were mixed into concrete，the cracking resistance and carbonization resistance were the best，and the hydration heat was thesmallst，which was suitable for the cementitious material mix ratioin the large-volume concrete mix of bridge cap.

Keywords：large-volumecushioncapconcrete;flyash;mineral slag powder;cementitious materials;ratiooptimization

在大体积桥梁承台混凝土浇筑施工中，因结构尺寸庞大导致水泥胶凝材料用量较多，水泥水化聚集大量热流难以迅速消散，导致混凝土内部与表面形成显著温差[]，进而产生温度应力裂缝。（剩余5458字）