Time impacts of treating pervious concrete with sodium bicarbonate

Abstract

Magnesium chloride (MgCl 2 ) deicers applications onto pervious concrete pavements can deteriorate the material, and studies investigate treatments to increase the concrete resistance to MgCl 2 attacks. In this paper, pervious concrete specimens are subjected to a treatment with Sodium Bicarbonate (NaHCO 3 ) solution, which seems to accelerate concrete carbonation and might hamper chemical reactions between MgCl 2 deicer and hydroxides in cement mortar. All specimens had their compressive strength tested and the time frames before and after treatment varied. Results show that at least 2 months should be given post curing before treatment to not harm the concrete, and longer post treatment periods may be beneficial.