Experimental Research On Basic Mechanical Properties Of Non-dispersible Underwater Concrete And Bend And Shear Behavior Of Beams Of Non-dispersible Underwater Concrete

Based on the environmental features of works which span over rivers and sea, a large number of underwater concrete materials will be extensively used in these works. The design technology of non-dispersible underwater concrete structures has become an urgent need to solve the problem, so it is important to study the performance of non-dispersible underwater concrete structures. The domestic study on the performance of reinforced non-dispersible underwater concrete structures is still blank. Internationally,only a few scholars had studied reinforced non-dispersible underwater concrete beam on flexural properties. In order to orbtain reliable scientific experimental data for the non-dispersible underwater concrete design and to formulate specifications and standards, it is proposed in this project to carry out the experiments in basic mechanical properties of non-dispersible underwater concrete and bend and shear behavior of beams of non-dispersible underwater concrete which has not been reported in China, sponsored by Expremental research on the static and dynamic performance of non-dispersible underwater concrete structures (grant number: 50708011) of National Natural Science Foundation of China:1.Through the experimentation of the basic properties of the NDC materials (including strength, elastic modulus, and the bond performance with reinforced, and so on); study the basic properties of NDC as well as the influence factor;2.To compare of the bending performance of reinforced non-dispersible underwater concrete members and the common reinforced concrete ones by experimentation; to carry out the theoretical analysis in whether the performance differences exist between reinforced non-dispersible underwater concrete members and the common reinforced concrete ones and why the differences do not exist or exist distinctly;3. To compare of the shear performance of reinforced non-dispersible underwater concrete members and the common reinforced concrete ones by experimentation; to carry out the theoretical analysis in whether the performance differences exist between reinforced non-dispersible underwater concrete members and the common reinforced concrete ones and why the differences do not exist or exist distinctly.The results showed that: 1. The amount of Anti-washout Admixture powder underwater and free water depth have a great impact on strength, modulus of elasticity and bond strength of concrete;2. The bending performance of reinforced non-dispersible underwater concrete members and the common reinforced concrete ones are similar, the bending of reinforced non-dispersible underwater concrete beam can be calculated by the bending theoretical of ordinary reinforced concrete beam;3. The shear performance of reinforced non-dispersible underwater concrete members and the common reinforced concrete ones are similar, the shear of reinforced non-dispersible underwater concrete beam can be calculated by theshear theoretical of ordinary reinforced concrete beam.