THE EFFECT OF SODIUM HYDROXIDE SOLUTION CONCENTRATION ON CLAY-ALITE HYDRATION PRODUCTS

Abstract

In this study, we evaluated the hydration process and products of cementitious materials made of clay and alite when mixed with aqueous sodium hydroxide solutions of varying concentrations. In both montmorillonite and kaolinite, the results showed that sodium hydroxide solution and calcium hydroxide generated by hydration of alite promoted the decomposition of clay structure. For the C-A-S-H produced, the silicate anion chain structure in the system with montmorillonite tended to be short due to the high Q¹ component, while the silicate anion chain structure in the system with kaolinite tended to be long due to the low Q¹ component.