Study on Preparation Technology and Antifreeze Performance of Slag Micropowder Pumice Lightweight Aggregate Concrete

7th Annual International Conference on Materials Science and Engineering

Ma, Jiansuo^1 ; Qi, Shangwen^1 ; Cai, Huanqin^1 ; Cui, Yanming^1

Hebei University of Architecture, Hebei, Zhangjiakou

075000, China^1

关键词: Filling effects;    Freeze-thaw cycles;    Freezing and thawing cycle;    Freezing methods;    Mass loss rate;    Mixing ratios;    Preparation technology;    Pumice lightweight aggregate concretes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012025/pdf
DOI  :  10.1088/1757-899X/562/1/012025

来源: IOP

【 摘 要 】

To study the influence of the amount of slag micropowder and the mixing ratio on the frost resistance of slag micropowder pumice lightweight aggregate concrete, the LC35 concrete was prepared with S95 grade slag powder, cement, ordinary sand and pumice as raw materials.The slow-freezing method was used to study the failure mode of the sample and the change of mass and compressive strength loss rate.The results show that the mass loss rate of slag micropowder pumice lightweight aggregate concrete after freezing and thawing cycles is small, and the loss of freeze-thaw strength is high. This mainly due to the destruction of aggregate pumice. Meanwhile, because of the Micro-filling effect of slag powder, the tensile strength has an effect of increasing the compactness of the concrete, and can effectively reduce the damage caused by the freeze-thaw cycle to the concrete.