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《Journal of Jiamusi Education Institute》 2013-01
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Study on cracking mechanism and prevention measures of concrete cracks

Ji Xiao-yu(Department of Civil Engineering,Wuchang Institute of Technology,Wuchang Hubei,430065,China)  
Concrete is a kind of heterogeneous brittle material,consisting of aggregate,cement and the gas and water.Changes in the conditions of temperature and humidity,sclerosis has volume deformation,due to a variety of material deformation is not consistent,mutual constraints arising from the initial stress,resulting in cracks look fine invisible naked eye in the bond between aggregate and cement stone or cement the province,commonly known as the micro crack.The micro crack distribution is irregular,and incoherent,but the difference in loading the goods,dry shrinkage of the circumstances,the cracks begin to expand,and gradually collude with each other,thus a greater visible cracks(width is generally visible cracks as the 0.03~0.05mm),known as the macro cracks,which are the crack.Therefore,the crack of the concrete,practically is an extension of micro crack.
【CateGory Index】: TU755
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