Study Of Mechanism And Character On Scour And Wear Resistance Of Hydraulic Concrete

The scour and abrasion destroy of stream with high speed and sand and rock on the hydraulic construction surface's concrete is the common disease, such as the flood discharge hole and gate, spillway, flooding dam and so on. Especially when the velocity of flow is high with lots of suspend and process matter, things will be worse.China is a country that has many rivers with lots of sand and rock. There are 42 rivers that the quantity of average year's sand of transportation is more than 10 million ton, more than 60 rivers that the year's biggest number of sand of transportation is more than 10 million ton. The Yellow River's quantity of sand of transportation is unusual in the word that, the average number of sand transportation reaches 1.64 billion ton. The average number of the bottom hole of the San Men Gorge's sand transportation is 80～100kg/m~3, sometimes the biggest number reaches 911kg/m~3. The Changjiang River, Sea River and the others rivers also have lost of sand that inflows the sea directly.Entry into 21 century, along with the stratagem of west development and the transportation of western electricity to eastern to be carrying into execution, China will build lots of large-scale and high water electricity power station, such as Xiao Wan, Long Tan, La Xi Wa, Gou Pi Tan, Xi Luo Du, Xiang Jia Ba, Jin Ping, Bai He Tan, Nuo Zha and so on, the velocities of flow of the construction of water discharge all reach 40～50m/s, so the hydraulic material's characteristic of crack resistance and the scour and wear resistance and the easy and fast building will be required higher. Aiming at the leave behind problem of engineering application of scour and wear resistance materials, linking with the west development, coming true the transportation of western electricity to eastern and requiring of scour and wear resistance materials for building large scale and high water electricity power station, make use of the modern new development of science materials and new technology and new method to implode the study and experimentation of new and high performance materials of sour and wear resistance will have importance meaning for satisfying the require of high dam reservoir nowadays and the future.The speed of ablation and wear and tear depends on the time variable, as it happens mutual the environment. Because the quantity and component and movement of sand in water...