Pervious concrete mix design for Nitrate removal from contaminated water

Taguchi method has recently been used in various fields such as optimization of concrete mix design, and it has been found very effective and useful mainly due to reduction in experimental work. In this study, mix design of pervious concrete (PC) with the purpose of decreasing the concentration of nitrate from polluted water based on Taguchi method in 3 levels and 4 factors (water to cement ratio, aggregate to cement ratio, percentage of nano-silica, and percentage of fine aggregate) was examined. Compressive strength, density, permeability, porosity and nitrate removal of concrete samples were evaluated. Among 9 mix designs, the optimum one was found according to experimental results to be with (W/C) =0.26, (A/C) =5, 6% nano-silica and 20% fine aggregate. The corresponding mechanical and physical properties were compressive strength of 3.6 (MPa), nitrate removal of about 75%, permeability of 1.06 (cm/s), the void rate of 19.7 (%) and density of 879 (Kg/m3).

کلیدواژه ها:

Pervious concrete ، Taguchi ، Nitrate removal ، Mix design ،