Microstructure Evolution from X-CT Measurements for Concrete/mortar under Multi-actions of Composite Salts Dry-wet Cycles and Loading

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Chen, Yanjuan^1,2 ; Gao, Jianming^1,2 ; Shen, Daman^1,2

Department of Materials Science and Engineering, Southeast University, Nanjing

211189, China^1

Key Laboratory of Construction Materials, Southeast University, Nanjing

211189, China^2

关键词: Concrete/mortar;    Dry-wet cycle;    Durability of concretes;    Erosion time;    Evolution process;    Micro-structure evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012101/pdf
DOI  :  10.1088/1755-1315/81/1/012101

来源: IOP

【 摘 要 】

Inthis research, microstructure evolution forconcrete/mortar under multi-actions of composite salts dry-wet cycles and loading was investigated through X-CT measurements. The evolution process of pores and micro-cracking with the erosion time were tracked. Compared the different erosion actions, it was found that dry-wet cycles promoted the pores become connected gradually. Besides, the dry-wet cycles accelerated the damage seriously on interface area between concrete and aggregate, whistle, loading contributes to the cracking propagation toward the internal. Moreover, fly ash played a positive role in the increasing of the number of harmless holes again and contributed to the durability of concrete.