Research on strength attenuation law of concrete in freezing - thawing environment

3rd International Conference on Energy Equipment Science and Engineering

Xiao, Qianhui^1 ; Cao, Zhiyuan^1 ; Li, Qiang^1

School of Architecture and Civil Engineering, Xi'An University of Science and Technology, xi'an

710054, China^1

关键词: Air entraining agents;    Compression strength;    Exponential attenuation;    Freeze-thaw cycles;    Freezing thawing cycles;    Freezing-thawing;    Life prediction models;    Water binder ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012095/pdf
DOI  :  10.1088/1755-1315/128/1/012095

来源: IOP

【 摘 要 】

By rapid freezing and thawing method, the experiments of concrete have been 300 freeze-thaw cycles specimens in the water. The cubic compression strength value under different freeze-thaw cycles was measured. By analyzing the test results, the water-binder ratio of the concrete under freeze-thaw environments, fly ash and air entraining agent is selected dosage recommendations. The exponential attenuation prediction model and life prediction model of compression strength of concrete under freezing-thawing cycles considering the factors of water-binder ratio, fly ash content and air-entraining agent dosage were established. The model provides the basis for predicting the durability life of concrete under freezing-thawing environment. It also provides experimental basis and references for further research on concrete structures with antifreeze requirements.