矿物掺合料对C55高性能混凝土性能的影响  

Effect of mineral admixture on the performance of C55 high performance concrete

作　　者：刘琴梅 LIU Qinmei(China Railway Bridge Bureau Group Sixth Engineering Co.,Ltd.,Wuhan 430100,China)

机构地区：[1]中铁大桥局集团第六工程有限公司,湖北武汉430100

出　　处：《混凝土与水泥制品》2025年第3期97-100,共4页China Concrete and Cement Products

摘　　要：对比研究了单掺和复掺矿物掺合料(粉煤灰、超细矿粉、普通矿粉)对高性能混凝土(HPC)工作性、力学性能和早期抗裂性能的影响。结果表明:当超细矿粉与粉煤灰以8∶2质量比复掺时,混凝土的工作性较好,28 d抗压强度最高,早期抗裂性能最好;单掺超细矿粉组试件的28 d抗折强度略均低于单掺普通矿粉组试件,矿粉与粉煤灰复掺组试件的28 d抗折强度略低于对应的单掺矿粉组试件;综合而言,相比超细矿粉与粉煤灰2∶8和5∶5的复掺比例,8∶2复掺时,HPC的综合性能最好。The effects of individual and compound mixing of mineral admixtures(fly ash,ultrafine mineral powder,and ordinary mineral powder)on the workability,mechanical properties,and early cracking resistance of high-performance concrete(HPC)were investigated comparatively.The results show that when ultrafine mineral powder and fly ash are mixed in the mass ratio of 8∶2,the concrete has the good workability,the highest 28 d compressive strength,and the greatest early cracking resistance.The 28 d flexural strength of specimen with ultrafine mineral powder alone is slightly lower than that of the specimen with ordinary mineral powder alone,and the 28 d flexural strength of specimen with composite addition of mineral powder and fly ash is slightly lower than that of specimen with mineral powder alone.Overall,compared to the compounding ratios of 2∶8 and 5∶5 for ultrafine mineral powder and fly ash,when the compounding ratio is 8∶2,HPC exhibits the best comprehensive performance.

关 键 词：高性能混凝土(HPC) 粉煤灰 超细矿粉 普通矿粉 工作性 力学性能 早期抗裂性能 

分 类 号：TU528.0[建筑科学—建筑技术科学]