粉煤灰对混凝土抗冻临界强度的影响研究  

Research on Influence of Fly Ash on Resistant Freezing Critical Strength of Concrete

作　　者：陈树新 CHEN Shu-xin(Hebei Port Group City Construction Development Co.,Ltd.,Hebei Qinhuangdao 066000,China)

机构地区：[1]河北港口集团城市建设収展公司,河北秦皇岛066000

出　　处：《当代化工》2019年第12期2781-2784,共4页Contemporary Chemical Industry

摘　　要：为研究粉煤灰对混凝土抗冻临界强度的影响规律,制备了不同预养护时间、抗冻温度粉煤灰掺量的混凝土试验样品,测试其抗冻4 d后60 d抗压强度,分析了粉煤灰掺量对混凝土抗压强度的影响规律,找出了不同粉煤灰掺量混凝土的抗冻临界强度。研究结果表明:粉煤灰混凝土的60d抗压强度随抗冻温度的降低而减小;混凝土保证最终强度的预养护时间随粉煤灰掺量的增大而增长;粉煤灰混凝土的抗冻临界强度随受冻温度的减低而增大。To study the effect of fly ash to concrete resistant freezing critical strength,concrete test samples with variable curing time and fly ash content were prepared.The 60-day compressive strength of the samples after 4-day freezing was tested.The effect of fly ash content on the compressive strength of concrete was analyzed.The resistant freezing critical strength of concrete with different fly ash content was determined.The results showed that,the 60-day compressive strength of fly ash concrete decreased with the decrease of freezing temperature;the concrete pre-curing time to ensure the final strength increased with the increase of fly ash content;the resistant freezing critical strength of fly ash concrete increased with the decrease of freezing temperature.

关 键 词：粉煤灰 混凝土 抗冻临界强度 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]