The Research of Alkaline Release Characteristics of Biological Adaptive Porous Concrete

摘要

In this article, the acid-base properties of porous concrete leaching solution were studied, The pH value of the porous concrete soaking solution was measured by the method of continuous soaking and repeated soaking, at the same time, the pH value of leaching solution and the ex-situ leaching method were compared and analyzed. The results show that the alkaline release are significant differences between porous concrete and conventional concrete. In the unit time, the alkaline release rate of porous concrete is faster than the rate of ordinary concrete. Moreover, the pH value of the leaching solution is significantly decreased after soaking several times, and it is also shown that there is a positive correlation between the rate of alkali release and porosity of porous concrete. At the same time, it is concluded that the ex-situ leaching method is not suitable for the alkaline practical measurement of the porous concrete.