Properties of lightweight matrix according to different types of alkali stimulants

Abstract

Recently, lightweight wall systems have been used mainly due to the appearance of flexible buildings, but EPS, which is flammable, is the main material. The damage caused by toxic gas in fire is recognized as a problem. NaOH, KOH and Ca(OH)2 were used as alkali stimulants and the properties of the matrix were evaluated according to the addition ratio of alkali stimulants. The addition of an alkali stimulant increases the pH and increases the alkali activity of the blast furnace slag, thereby changing the performance of the matrix. When NaOH and KOH are used as alkali stimulants, the density of the cured product is low and the incidence of the internal void of the cured product is high. When Ca(OH)2 is used as an alkali stimulant, it shows the best performance when measuring pH, setting time, and strength. This seems to be due to the ionization degree of the (OH) group. However, the incidence of voids was the lowest. When NaOH and KOH are used as alkali stimulants, the density of the cured product is low and the incidence of the internal void of the cured product is high. When Ca(OH)2 is used as an alkali stimulant, it shows the best performance when measuring pH, setting time, and strength. This seems to be due to the ionization degree of the (OH) group. However, the incidence of voids was the lowest.