Mechanical Properties Of Pervious Concrete And Its Application On The Slope Protection Board

As a new ecological and environmental material, water-permeable concrete has the characteristic of porosity which can reduce urban noise and alleviate urban heat island effect. Recently, water-permeable has been widely used at home and abroad as pavement material. This water-permeable concrete possesses certain prospect of practical application to slope protection, while relevant study is conducted rarely domestically. Traditional concrete slope protection has heavy weight and bad ecological effect. And slope protection of common plants is of low stability and its combination with construction project requires high technology and high quality of constructors. On the premise of certain stability, water-permeable concrete slope protection which is the main focus of this thesis can serve as a cushion against influence of rain. The whole thesis is mainly demonstrated from the following three aspects:1. Seeking the mix proportion of permeable concrete that meets the command of intensity, permeability and freezing resistance. Doing experiment of mechanical property and the study of freezing-thawing durability by adopting coarse aggregate size of 5～10mm without doped fine aggregate and adding sample block formulated by water-reducing agent with different water cement ratio and goal porosity, which aims at exploring the effect of vibration time on compressive strength, permeability coefficient and measured porosity. Then under the same condition, the experiment has been conducted for freezing-thawing durability of sample block to analyze the effect of water cement ratio and goal porosity on anti-freezing property. Finally the possible mix proportion can be determined for permeable plate.2. Analyzing constructive relation of water-permeable concrete by adopting finite element method. Based on finite element theory, this chapter analyzes the nonlinear behavior of random aggregate of water-permeable concrete by using ANSYS analyzing software to explore its stress and strain under uniaxial compression. Then the constructive relation associated with compressive strength is obtained to discuss inner change of water-permeable concrete in compressive state. Main factors that influence the stress are also analyzed.3. By simplifying the calculation, determined the shape, thickness of the initial permeability of concrete slope protection board, provide a theoretical basis for its applications, simplily analysis the factors that affect slope stability and water permeability of concrete slope stability calculation methods used for flooding, discussed construction technology of the permeability of concrete slope protection board, and Prepared a preliminary construction process.