Experimental Research On Properties Of Rcc Under Uniaxial Dynamic And Compression-shear Static Stress States

Compared to traditional concrete construction technology, roller compacted concrete (RCC) dam construction technique has some advantages, such as faster construction, using less cement, better quality of projects, higher level of mechanization, lower cost of construction, and so on. It contain higher economic effectiveness. With the continuous increase of investment in our country in the fields of infrastructure construction, such as, dams, hydropower station, and so on, RCC technique is used to construct large hydraulic projects more and more frequently, furthermore, it obtained remarkable result in engineering adhibition.In interior of RCC dams, there are various stress state at zones of different. It is two-dimension or three-dimensional combined stress states in some parts. And internal force of RCC is relatively complex under the earthquake also. Under these circumstance, dams constructed and used will be dangerous, if uniaxial pull, pressure and shear strength theory are used for designing and checking projects. Therefore, in order to meet the construction needs, it is necessary to explore and research the theory of RCC property at dynamic and complex stress state further. This article will research the laws of RCC for uniaxial dynamic property and biaxial compression-shear strength.According to the requirements of mixture ratio and experimental program, two graded-aggregates and three graded-aggregates RCC specimens that were included-aggregates or noumenon were produced. Compressive strength, tensile strength, compression-peak-strain and modulus of compressive elasticity of two graded-aggregates and three graded-aggregates RCC specimens that were included-aggregates or noumenon were obtained at four different kinds of strain rate from uniaxial dynamic test. And the failure modes of different kinds of specimens were contrasted. Based on the test data, the correlativity between strain ratio and compressive strength, tensile strength, compression-peak-strain, modulus of compressive elasticity were obtained, and corresponding formulas and curves were fitted. According to the biaxial compression-shear test of RCC, shear strength of noumenon and included-aggregates specimens of two kinds of graded-aggregates RCC were obtained with five kinds of lateral stress. The experimental failure modes of corresponding specimens were described. Moreover, variation laws and reasons of different kinds of RCC specimens with diverse lateral stress were analyzed. Linear relation between shear strength and lateral stress were obtained from the test data, and corresponding formulas and curves were fitted. Meanwhile, the compression-shear failure laws of RCC were analyzed and described by twin shear strength theory, and that were very close to data what measured from experiment. It reflected the actual compression-shear laws of RCC. All the researched achievements of the above providing the foundation for analyzing dynamic reaction and researching compression-shear effect with RCC dams. It will be provided feasibly to reference and learn from, for engineering practice.