Influence of Saturation Degree on Carbonization Resistance of Alkali-Activated Slag Mortar
LIAO Zimo
XIAO Zerong
ZHENG Xiangzeng
JIANG Xuan
JI Tao
Abstract：The influence of saturation degree on the carbonation resistance of alkali-activated slag mortar(ASm)with water glass as activator was studied by X-ray diffraction,thermogravimetric analysis,nuclear magnetic resonance,and mercury intrusion porosimetry.The results show that with the decreases of saturation degree,the decalcification of calcium alumino silicate hydrate(C-(A)-S-H)gel becomes more severe,the total porosity and the most probable pore size of ASm increase.The unstable aragonite and vaterite generated by carbonation increase with the decreases of the saturation degree,resulting in the deterioration of the carbonation resistance of ASm.With the decreases of saturation degree,the reduction in compressive strength retention rate and the increase in carbonation depth of ASm are decreased.
Keywords：alkali-activated slag mortarsaturation degreeC-(A)-S-H gelcarbonization resistance
Publication Date：2024-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1054-1059,1070 )