Research On Control To Cracks Of Massive Concrete Structure

With economic development of China, the scale of construction works is become more and more large and complicated. This makes the temperature cracks of massive concrete structure in industrial buildings become increasingly prominent with a universal problem.The problem of temperature cracks of Massive concrete is very complicated. It involves all aspects of the engineering structure. The control to massive concrete foundation temperature cracks is more related to rock, structure, building materials, construction, environmental, and other multi-disciplinary. The heat of hydration is released in the hardening process of massive concrete will cause a greater temperature changes. The resulting temperature stress is the main factors to cause concrete cracks, then it affect integrity, waterproof and durability of the structure, and it become a hidden danger of structure. Cracks control must be considered during the construction of massive concrete structure.The mechanism and control measures of temperature cracks of massive concrete foundation in this paper are analyzed. According to circumstances, these measures are applied in construction of the specific massive concrete foundation. Strict control measures are taken during the construction in the choice of materials, mix, additives, construction layout, pouring technology, conservation and other links, at the same time, temperature difference between the internal and external of the foundation in the typical locations are monitored. The monitoring results show that the temperature differences are all reasonable, cracks are avoided. In addition, control measures of temperature cracks are taken that are reasonable and effective in this paper.In this paper, the temperature control measures and monitoring results not only provides a convenient for the similar construction projects, but also provides reference data for further theoretical research.