The Philosophy of Concrete Mix Design and Construction Technology Research under Hypothermia Environment

Towards Tongtianhe Bridge located in high altitude alpine permafrost, the absence of the concrete mix data and other special circumstances, we do plenty of relevant research: concrete mix preliminary design, comparative study of the strength and frost resistance of putting two water reducer in concrete under standard conservation and outdoor conservation, and the pore structure of the incorporation of two water reducer paste are analyzed. The results shows that: the early strength type of polycarboxylic water reducer possesses good effect of low temperature, and it can better improve the internal pore structure of sample, increase frost resistance of concrete. In addition, under the special circumstances, we discuss the construction and maintenance technology of concrete in order to better serve the construction site.