Road Performance And Mix Design Of Porous Concrete With Non-vibration Molding

By the development of road construction, the road is influenced by water increasingly. Now, more and more researchers are paying attention to porous concrete permeable base for its excellent function of drainage capability. The molding methodsof porous concrete are discussed in the paper, and a new indoor molding method-Non-vibration molding is put forward. Some aggregate gradations for porous concrete with non-vibration molding are put forward by analyzing and consulting the fruit of aggregate gradation in and abroad. And then the drainage performance of porous concrete is studied, porosity and coefficient of permeability are thought to be good targets of its drainage performance. Measure volume method is adopted to test porosity, and the dependence relation of coefficient of permeability and porosity is drawn by tests. The mechanical properties of strength and stress-strain of porous concrete are researched, and the strength development with time, relationships between different strength and modulus and strength etc. are drawn. The physical properties of temperature contraction, dry shrinkage, anti-erosion and frost resistance are also proved to be fine by tests and mechanism analysis. On characteristic of different molding methods, margin cement mortars method is put forward to evaluate the workability of porous concrete with non-vibration molding. The mix design targets and criteria of porous concrete are advanced, volume method is adopted for porous concrete with non-vibration molding, and the mix design method of porous concrete with non-vibration molding is put forward finally.