大体积现浇抗裂混凝土施工裂缝防治研究.

In order to control the strain caused by large temperature drop in mass concrete construction, which leads to the generation and development of micro cracks, concrete anti - cracking agent has been tested and applied in mass concrete construction with its excellent performance of compensating shrinkage. In this paper, the construction workability, heat dissipation and mechanical properties of impermeable concrete with different concentrations of HME - V anti - cracking agent (0, 4%, 8%, 12%, 16%) are studied by using the shri~e compensating concrete technology. Meanwhile, it is compared with the impenneable concrete with 0. 4% polypropylene fiber. ABAQUS finite element software is used to numerically simulate the temperature field and plastic damage during the construction of the roof and side walls of the twmel. The test results show that the impermeable concrete prepared with anti - cracking agent has better workability, better mechanical properties than the original concrete, and has good performance in plastic damage and mass heat dissipation. [ABSTRACT FROM AUTHOR]