Study on frost resistance durability and bubble parameters of high air content concrete under different freezing rate

2nd International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Ge, Xueliang^1^2^3^4 ; Lu, Cairong^1^2^3^4 ; Mei, Guoxing^1^2^3^4

Nanjing Hydraulic Research Institute, Nanjing, China^1

State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing, China^2

Research Center for Climate Change, MWR, Nanjing, China^3

Research Center on New Materials in Hydraulic Structures, MWR, Nanjing, China^4

关键词: Air void parameters;    Average diameter;    Bubble parameters;    Durability of concretes;    Dynamic elastic moduli;    Electronic balances;    Low temperatures;    Macroscopic and microscopic;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/490/3/032030/pdf
DOI  :  10.1088/1757-899X/490/3/032030

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The frost resistance durability and bubble parameters of high air content concrete under different freezing rate were studied from the perspective of macroscopic and microscopic properties. The frost resistance durability and air void parameters of concrete were analysed at multiple scales by electronic balance, non-metal ultrasonic tester and linear traverse method, respectively. The results indicated that the mass and dynamic elastic modulus of concrete decrease with the increase of freezing rate. As the freezing rate increases, the bubble spacing of concrete increases, and the average diameter of the bubbles becomes larger. Therefore, in addition to the low temperature during freezing, freezing rate is another important factor affecting the durability of concrete.