单掺及双掺高强混凝土抗冻融性能试验研究  

TEST RESEARCH ON THE FREEZING-THAWING RESISTANCE PERFORMANCE OF HIGH-STRENGTH CONCRETE WITH SINGLE ADMIXTURE AND DOUBLE ADMIXTURES

作　　者：李雁[1,2] 吕恒林[1] 殷惠光[1,2] 张连英[1,2] 李兵[2,3] 刘瑞雪[1,2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221008 [2]徐州工程学院土木工程学院,江苏徐州221018 [3]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《工业建筑》2015年第2期1-4,共4页Industrial Construction

基　　金：江苏省产学研前瞻性联合研究项目(BY2012085);住房和城乡建设部科学技术项目(2013-K4-22);国家建筑材料行业科技创新计划(2013-M5-7);徐州市科技计划项目(XZZD1320)

摘　　要：通过对无掺料、添加粉煤灰、矿粉及复合矿物掺合料(粉煤灰+矿粉)的高强(C60)混凝土进行淡水快速冻融循环试验,研究掺料对混凝土抗冻融性能的影响,结果表明:复掺混凝土质量出现负损失,相对动弹性模量降低最慢,表面剥蚀程度最轻,抗冻融性能最好;掺入50%矿粉后,混凝土的质量损失率、相对动弹性模量降低量及表面剥蚀情况和无掺料混凝土差别不大,抗冻融性能次之;50%粉煤灰混凝土的质量损失率最大、相对动弹性模量降低最快,表面剥蚀最为严重,抗冻融性能最差。The fast freeze-thaw tests with fresh water on high strength concrete ( C60 ) with fly ash or slag and composite admixture, as well as the one without admixtures were conducted.The results showed that for the concrete with admixtures ( slag and fly ash) , the mass-loss rate was the smallest and the relative dynamic modulus of elasticity was reduced slowest, meanwhile the surface was denuded slightest, indicating a best freezing-thawing resistance performance.For the concrete with 50% slag and concrete without mineral admixtures, the mass-loss rate, the relative dynamic modulus of elasticity and the surface denudation were about the same, meanwhile their freezing-thawing resistance performance was a little worse than the concrete with admixtures ( slag and fly ash ) .For the concrete with 50%fly ash, the mass-loss rate and the relative dynamic modulus of elasticity reduced fastest, and the surface was denuded seriously, indicating a worst freezing-thawing resistance performance.

关 键 词：矿物掺合料 冻融 质量损失 相对动弹性模量 

分 类 号：TU528[建筑科学—建筑技术科学]