Research on Emperature Shrinkage Compensation Material and Crack Resistance of Mass Concrete
With the development of infrastructure construction in China,the problems of water seepage and structural safety caused by the cracking of mass concrete located in subway bottom and side walls have aroused great attention of the builders.Due to the characteristics of high design strength,large consumption of cement and dense layout of steel bars,the special problem of temperature control and crack pre-vention of mass concrete is formed,so it is of great significance to research on improving the crack resistance of mass concrete.In this paper,the crack resistance test of mass concrete is carried out by using shrinkage compensation materials.The test results show that the tensile strength and ultimate tensile value of mass concrete can be improved and the autogenous volume shrinkage deformation can be converted into expansion deformation under the condition that the compressive strength,adiabatic temperature rise and elastic modulus are less affected by using shrinkage compensation materials.According to the evaluation of the crack resistance value Φ proposed in this paper,the shrinkage de-formation can be compensated for the whole time,the crack resistance of concrete can be improved,and the analysis of the crack resistance of concrete is time-effective.At the same time,the mechanism of crack resistance is analyzed through the pore structure,hydration products and compensation shrinkage characteristics.The research results have guiding significance for the crack resistance control of mass concrete.
mass concretecracking resistancetemperature shrinkage compensationmechanism of crack resistance
万方数据
维普
