40年大坝混凝土芯样的微观测试与分析.pdf

2010.5 李珍1,2,3　肖靓1,2,3　章瑞文1,2,3 摘　要： 关键词： Microscopic tests and analysis of concrete core sample in a 40-year-old dam 1,2,3 1,2,3 1,2,3 Zhen L i 　Liang Xiao 　Rui-wen Zhang (1. Changjiang River Scientifi c 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) Abstract ：The Danjiangkou Dam is a 40-years old dam in Hubei province. In the 40 years running, the whole Dam is functioning properly. During the initial construction, vast experiments were made by the Changjiang River Scientifi c Research Institute and the experimental results showed that a sort of active aggregate - fl int was contained in concrete and relevant measures were put forward to prevent the happening of the Alkali-Aggregate Reaction (AAR) in the concrete. And any alkali-aggregate reaction deterioration haven’t been found after the 40 years running of the dam. Because of the using of the reactive aggregate during the construction, there are many important studies have been done, such as testing the physical performance of the old concrete and checking whether the reaction of the reactive aggregate occurred, investigating whether the AAR of core sample occurred after curing in certain conditions. Microscop