Effect of Internal Parameters of Activator on Performance of Alkali-Activated Grouting Material

Abstract

Abstract: Preparation of alkali activator by sodium silicate and sodium hydroxide, and the influence of the molar concentration of SiO₂ and module in activator on the performance of alkali-activated slag grouting material were studied. The results show that the fluidity of alkali-activated grouting material is mainly controlled by the molar concentration of SiO₂ in the activator, and the influence of module on the fluidity of grouting material is only reflected when the molar concentration of SiO₂ is high. The molar concentration of SiO₂ and module in activator are the key parameters affecting the autogenous shrinkage of alkali-activated grouting material, and jointly control the autogenous shrinkage of alkali-activated grouting material. When the molar concentration of SiO₂ in the activator is greater than 2 mol/L, in order to ensure that the alkali-activated grouting material has sufficient compressive strength at the later stage, the module should not be less than 1.2. The molar concentration of SiO₂ in the activator should be controlled below 4 mol/L to reduce the impact on toughness and durability.

Key words: alkali-activated, grouting material, GGBFS, module, SiO₂, autogenous shrinkage

CLC Number:

U414

CHI Fengxia, HAN Bo, CHENG Qinling, ZHOU Wenjing. Effect of Internal Parameters of Activator on Performance of Alkali-Activated Grouting Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1751-1759.

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