Gradation characteristic analysis of vegetation‐type porous concrete

Porosity acts as a key role in realizing the planting function of vegetation‐type porous concrete. However, the porosity depends on the aggregate gradation characteristic. Then, compared with the gradation characteristic of normal concrete, the gradation characteristic of vegetation‐type porous concrete is discussed. Furthermore, the porosity calculation of vegetation‐type porous concrete with three kinds of grain‐size‐ranges (9.5 mm‐16 mm, 16 mm‐19 mm and 19 mm‐26.5 mm) is deduced. Results present that the stacking theory is more suitable than the filling theory to describe the aggregate accumulation pattern. Besides, the calculation formula is deduced, which can effectively calculate the porosity of vegetation‐type porous concrete.