文献类型：期刊文献

中文题名：硅灰掺量对高性能混凝土强度及孔隙结构影响分析

英文题名：Analysis of the Impact of Silica Fume Dosageon the Strength and Pore Structure of High-performance Concrete

作者：李述茂 段莉 徐桂弘 龙海磊 陈宗洪 王尊闲 秦鹏

第一作者：李述茂

机构：[1]贵州理工学院土木工程学院,贵州贵阳550008

第一机构：贵州理工学院土木工程学院

年份：2025

期号：3

起止页码：20-21

中文期刊名：江西建材

基金：贵州理工学院大学生创新创业训练项目《碳达峰背景下贵州特色机制砂高性能自密实混凝土力学性能研究》;贵州省基础研究计划自然科学基金《高性能自密实混凝土拌合物的自密实性与耐久性研究》(项目编号:黔科合基础-ZK[2022]一般170);国家自然科学基金地区基金《多雨地区无砟轨道结构裂纹处“冒白浆”及空蚀演化机理研究》(项目编号:52268065)。

语种：中文

中文关键词：高性能自密实混凝土(HPSCC);硅灰;抗压强度;孔隙结构

外文关键词：High-performance self-compacting concrete(HPSCC);Silica fume;Compressive strength;Pore structure

摘要：文中通过试验研究了硅灰掺量对高性能混凝土(HPSCC)的抗压强度和孔隙结构的影响。试验制作了不同硅灰掺量的HPSCC试块,通过立方体抗压强度试验和孔隙结构试验,分析硅灰掺量对HPSCC性能的影响。结果显示,硅灰掺量对HPSCC的抗压强度有显著影响,硅灰掺量为12%时,28 d抗压强度达到最高;硅灰掺量增加对HPSCC早期抗压强度影响较大,而对后期强度影响不明显。孔隙结构试验表明,HPSCC的孔隙主要以介孔为主,且随着硅灰掺量的增加,介孔含量增加。硅灰掺量为12%时,孔隙发育最为均匀,孔径分布集中。
This paper investigates the effects of silica fume dosage on the compressive strength and pore structure of High-performance selfcompacting concrete(HPSCC)through experimental studies.HPSCC specimens with varying silica fume dosages were prepared and tested for compressive strength and pore structure.The results show that silica fume dosage significantly affects the compressive strength of HPSCC,with the highest 28-day compressive strength achieved at a dosage of 12%.An increase in silica fume dosage has a greater impact on the early compressive strength of HPSCC,while its effect on later strength is not significant.Pore structure tests indicate that the pores in HPSCC are mainly mesopores,and their content increases with the increase of silica fume dosage.At a dosage of 12%,the development of pores is the most uniform,and the pore size distribution is concentrated.