Full Length Research Paper
Abstract
The bituminous concrete mask was the water barrier system of Bouhnifia dam "Algeria”. It was applied on the upstream slope. The mask risked to be unstable because of the sunlight temperatures which can reach (65°C). So, it was covered with a thermal protection which demands a periodic renovation. This solution was very expensive. To avoid these costs, one tried to test the stability of the mask without the thermal protection. One prepared a reduced sample of the mask. Then, one put this sample on an inclined facing of 1/1 (slope of the Bouhnifia dam); and maintained it in an oven during more than 48 h under a temperature of 70°C. This experience permitted to determine that the sample kept its initial shape. The gotten results confirmed that the mask of the Bouhnifia dam can resist the action of the temperature without the necessity of the thermal protection.
Key words: Dam, water barrier, upstream mask, bitumen, bituminous concrete.
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