负温条件下粉煤灰粒度分布对混凝土抗冻性的影响  

EFFECTS OF PARTICLE SIZE DISTRIBUTION OF FLY ASHON THE FROST-RESISTANCE OF CONCRETEUNDER NEGATIVE TEMPERATURE

作　　者：田悦[1] 刘雪婷 TIAN Yue;LIU Xueting(Shenyang Urban Construction University Civil Engineering Department,Shenyang 110167,China)

机构地区：[1]沈阳城市建设学院土木工程系

出　　处：《低温建筑技术》2019年第11期6-8,共3页Low Temperature Architecture Technology

基　　金：辽宁省教育厅科学研究经费项目;沈阳城市建设学院新型建筑材料与结构科研团队资金支持项目

摘　　要：针对我国三北地区冬季施工特点,研究了在不掺防冻剂的情况下,负温条件下粉煤灰粒度分布对混凝土抗冻性的影响。研究结果表明,随着养护时间增加早期不同粉煤灰粒度分布混凝土抗压强随着其细度的增加不断增加,后期抗压强度随着粉煤灰粒径变细而变化的幅度降低;质量损失率随着粉煤灰变细,出现先减小后增加的现象;相对动弹性模量随着粉煤灰粒度变细,会出现先增加后降低的现象。This study researches about the effects of particle size distribution of fly ashon the frost-resistance of concrete under negative temperature without antifreeze,according to the winter construction characteristics in the three north areas of China.The result shows that the compressive strength of early ages increased with the increase of fineness of fly ash,For the later period, with the extension of curing age, compressive strength increased with the decrease of particle size of fly ash, but the amplitude decreases.The mass loss rate increases with the decrease of fly ash, and the relative dynamic modulus decreases with the granularity of fly ash.

关 键 词：负温混凝土 粉煤灰 粒度分布 抗冻性 

分 类 号：TU528[建筑科学—建筑技术科学]