DataVXAdvances in Cement ResearchPaper
journal article·2022-09

Chemical deformation and mass change of metakaolin-based geopolymer grouting material in sulfate environments

Leping Liu, Hainan Liu, Yue Xu, Maojia Xie, Yan He

Advances in Cement Research· Volume 34· Issue 9
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Source abstract

Abstract

Metakaolin (MK) and waterglass (WG) with a modulus of 1.3 were mixed to prepare MK-based geopolymer grouting materials (MKGPGM) with different alkalinity (concentration of sodium oxide in modified WG by mass of MK of 11 wt%, 12 wt% and 13 wt%). The linear expansion, mass change, mechanical properties and microstructure of the specimens were investigated after being immersed in pure water and sodium sulfate solutions with a concentration of 1–4 wt% for 90 days. The results showed that the main gel products were sodium silicoaluminate hydrate gels. Gypsum and ettringite were not detected in the specimens. The MKGPGM showed slight expansion first, followed by a micro-shrinkage. When the mass concentration of sodium oxide was 12 wt%, the maximum expansion rate was less than 0.12%. The MKGPGM showed a small increase in mass, essentially unchanged compressive strength and good anti-sulfate corrosion performance.
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Research context

Metals & alloys

OpenAlex topics: Concrete and Cement Materials Research · Grouting, Rheology, and Soil Mechanics · Microbial Applications in Construction Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Materials, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China; Guangxi Transportation Science and Technology Group Co., Ltd, Guangxi Key Lab of Road Structure and Materials, Nanning, PR China (corresponding author: )

College of Chemistry and Materials, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning, PR China

College of Chemistry and Chemical Engineering and Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, PR China

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