Microscopic tests and analysis of concrete core sample in a 40-year-old dam
zhen li1; 2; 3 liang xiao1; 2; 3 rui-wen zhang1; 2; 3 (1. changjiang river scientific research institute of cwrc; 2. mwr technology research centre of water project safety and disease prevention engineering; 3. national research centre of dam safety engineering technology; hubei wuhan; 430010)