Study On Techniques Of Crack Control In Concrete Structures

Shrinkage crack in concrete structure is an important subject cared by academic members and in building engineering. This paper investigated concrete shrinkage and temperature cracks, simultaneously, their causes were studied. Causes of four common types concrete structures cracks and its prevention control measures were studied. It analysis the control measures of the cracks which in cast-in-site concrete floor and propose a good variety of crack control technology based on projects, its feasibility of the project was discussed.Papers including:1.The mechanism and classification of crack was analyzed theoretically.2.Deformation was described,such as crack caused by temperature stress and concrete structure shrinkage. And introduce the control measures for various kinds of cracks.3. The control techniques of the concrete crack in mass concrete, precast reinforced concrete, concrete block buidings and especial structure building were summarized in design, construction technology and environmental aspects in this paper.4. The most common cracks in cast-in-site concrete floor from engineering practice were investigated. Considered of concrete materials, construction technology, design procedure, the causes of such cracks were analyzed, and prevent the treatment and preventive measures.5. Input the control methods for cracks of cast-in-site concrete floor into the project and confirm it is possible to control the cracks of the cast-in-site concrete floor through compound matters as materials, design and construction.The effect is noticeable and the goal is reached economically and socially acknowledged.