Rearch On Controlling Crack Of Shear Wall In Concrete Structure

Concrete production from development to mix mixed, especially dual-dopedtechnology, the development of high-performance concrete admixture technology aswell as the popularity of pumping concrete, concrete technology put forward higherrequirements, due to the limited mastery of the new technologies of the concrete,noteffective control on the key link, to cause concrete shear wall cracks accidentsfrequent. The consequences caused by the quality of the project accidents and economiclosses.Through theoretical analysis and engineering application examples, reasons to causecracks in the concrete shear wall full of analysis and argument, to find the key factorscausing cracks in the concrete shear wall and control countermeasures should be taken,the concrete shear wall cracks achieve controllability of status.The main content of this study is the concrete mix design (including early control ofraw materials) and the concrete curing concrete shear wall cracks, and through researchto find a series of response measures.The study showed that the concrete shear wall length and surface area, caused by thecontraction of the structure, the expansion of larger, and therefore more prone to cracks.Shear wall cracks more than90%, the direct cause of cracks caused by a non-load stress,stress is caused by concrete shrinkage or expansion. Temperature shrinkage, dryingshrinkage of concrete expansion caused mix than poorly designed; plastic shrinkageand outside temperature, humidity relationship and strengthen the conservation is themost effective means to solve the plastic shrinkage. Therefore, two important factors tocontrol concrete shear wall cracks with conservation than design with concrete.