磨细矿渣和粉煤灰对高性能砼徐变性能的影响  

Creep Character of High Performance Concrete with Ground Granulated Blast Furnace Slag and Fly Ash

作　　者：赵庆新[1] 孙伟[1] 缪昌文[2] 田倩[1] 郑克仁[1] 林玮[1] 

机构地区：[1]东南大学材料科学与工程系 [2]江苏省建筑科学研究院,南京210008

出　　处：《武汉理工大学学报》2005年第11期35-38,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金重点项目(59938170);国家自然科学基金(50278018)

摘　　要：为研究磨细矿渣和粉煤灰对高性能混凝土徐变性能的影响,在(20±1)℃、相对湿度为(60±5)%和33%的载荷水平下,测试了不掺磨细矿渣和粉煤灰的基准混凝土及磨细矿渣等量取代水泥量为30%、50%和80%、粉煤灰等量取代水泥量为12%、30%和50%、磨细矿渣和粉煤灰双掺等量取代水泥50%时高性能混凝土的徐变度。试验结果表明:磨细矿渣掺量为30%和50%时,磨细矿渣对混凝土徐变性能的影响不明显,当磨细矿渣掺量为80%时,混凝土抵抗徐变的能力大大下降,其1年的徐变度为基准混凝土的1.74倍;粉煤灰掺量为12%和30%时,混凝土抵抗徐变的能力随其掺量提高而增强,其1年的徐变度分别为基准混凝土的76%和46.5%;粉煤灰掺量为50%时,混凝土抵抗徐变的能力没有得到改善,其1年的徐变度为基准混凝土的102%;磨细矿渣和粉煤灰总取代率为50%时,双掺的徐变度明显低于单掺磨细矿渣或粉煤灰的情况。The specific creep of high-performance concrete （HPC） incorporated with 30% , 50% , 80% ground granulated blast-furnace .slag （GGBS）, 12% , 30% , 50% fly ash, 35% GGBS and 15% fly ash, 15% GGBS and 35% fly ash, and the contrast one which without GGBS and fly ash were tested under stress strength ratio of 33% in order to clarify the effect of fly ash on creep character, the test were made under controlled temperature （20±1）℃ and humidity （60±5）% conditions, resuits show that the （GIGS has slight effect on the specific creep of HPC with 30% and 50% （GIGS, it offers great negative ef fect on the creep characteristics of HPC when the incorporating proportion of （GIGS reaches 80% , the specific creep after one year of HPC with 80% （GIGS is 1.74 times of the contrast one, the fly ash offers great positive effect on the creep characteris- tics of HPC with 12% and 30% fly ash, the specific creep after one year are 0.76 and 0. 465 times of the contrast one respectively, it has slight effect on the specific creep of HPC when the incorporating proportion of fly ash reaches 50% , the specific creep after one year is 1.02 times of the contrast one, the specific creep of HPC with 35% （GBS and 15% fly ash or 15% GGBS and 35% fly ash was greatly reduced than the condition with 50% （GBS or the condition with 50% fly ash.

关 键 词：高性能混凝土 磨细矿渣 粉煤灰 徐变 

分 类 号：TU528.01[建筑科学—建筑技术科学]