Ratio Mass Concrete Design Optimization And Control Technology Cracks

Massive Concrete cracks were troubled years of construction quality defects, such as cracks moredeeper, it will directly affect the structural safety. These massive concrete structure, cracks due to the load because of the possibility of smaller, and by the hydration of cement hydration process of the release of heat and temperature changes caused by the shrinkage of concrete shrinkage stress and thermal stress is the main reason for the cracks, Coagulation in large volume on the construction of the structure to solve the important issues. In the mass concrete, temperature stress and temperature control is of great significance, mainly in the mountains in two ways. First, in the construction of concrete often cracks temperature affect structural integrity and durability. Secondly, in the operation of the temperature change on the structure of the stress state of the significant impact that should not be overlooked. We encountered mainly in the construction of the temperature cracks. This paper mainly from the following aspects carried out in-depth research and study:(1)Temperature of massive concrete cracks and the reasons for the selection of analysis;(2)Material from the composition of raw materials: the quality of cement, sand particle size distribution, the amount of additives, such as fly ash content concrete to the project C20 ratio has been optimized;(3)Mass concrete temperature control measures: mass concrete temperature is forecast, the temperature stress of mass concrete, mass concrete temperature measurement system;(4)through the ratio of optimization and thermal stress, that the best fly ash in concrete production by 25%, and the need to ensure that no cracks in concrete and outside temperature difference of less than 12℃.