Resistance of Stearate-Modified Alkali-Activated Slag Mortar against Physical Sulphate Attack
ZHANG Yudian
KONG Run
ZHANG Zhe
DENG Jiaxin
YANG Kai
Abstract：Three types of stearates were used to modify alkali-activated slag(AAS)and the variation of its performance was examined and analysed under sodium sulphate environment.AAS exhibits significant physical crystallisation damage under wet-dry cycles of sodium sulphate.The addition of calcium stearate(CaSt)and sodium stearate(NaSt)can improve the resistance of AAS against physical crystallisation damage of sodium sulphate by decreasing its sorptivity,optimizing its micro-structure,and mitigating its appearance damage in the semi-immersion-wet-dry cycle environment,whereas the potassium stearate(KSt)exacerbates the physical crystalline damage of sodium sulphate of AAS.
Keywords：alkali-activated slag cementcrystalline attackstearatesorptivitypore structure
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 904-912 )