Mix Proportion Optimization and Microstructure Analysis for Geopolymer Grouting Material Based on Response Surface Methodology

FAN Lidan; YANG Jie; YU Yongqiang; ZHANG Jiyun; TANG Jinzhao; SU Zhouhu

doi:10.13204/j.gyjzG22122706

Volume 53 Issue 6

Jun. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(6): 194-201

FAN Lidan, YANG Jie, YU Yongqiang, ZHANG Jiyun, TANG Jinzhao, SU Zhouhu. Mix Proportion Optimization and Microstructure Analysis for Geopolymer Grouting Material Based on Response Surface Methodology[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 194-201. doi: 10.13204/j.gyjzG22122706

Citation:

FAN Lidan, YANG Jie, YU Yongqiang, ZHANG Jiyun, TANG Jinzhao, SU Zhouhu. Mix Proportion Optimization and Microstructure Analysis for Geopolymer Grouting Material Based on Response Surface Methodology[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 194-201. doi: 10.13204/j.gyjzG22122706

Citation:

FAN Lidan, YANG Jie, YU Yongqiang, ZHANG Jiyun, TANG Jinzhao, SU Zhouhu. Mix Proportion Optimization and Microstructure Analysis for Geopolymer Grouting Material Based on Response Surface Methodology[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 194-201. doi: 10.13204/j.gyjzG22122706

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Mix Proportion Optimization and Microstructure Analysis for Geopolymer Grouting Material Based on Response Surface Methodology

doi: 10.13204/j.gyjzG22122706

1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
2. International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Jiaozuo 454003, China

Received Date: 2022-12-27
Available Online: 2023-08-18

Abstract

Abstract

It is of great significance for geopolymer grouting material as a low-carbon material to replace high energy consumption cement-based grouting material in tunnel reinforcement engineering. In order to reasonably design the ratio of slag-based geopolymer grouting material and reveal the mechanism of alkali-activated reaction, firstly the ratio of fly ash was determined through single factor experiment, then the response surface methodology and central composite design were applied for establishing the prediction models of compressive strength for geopolymer grouting material. In the design, alkali activator modulus, alkali activator concentration and liquid-solid ratio were taken as independent variates, and the compressive strength of cementation body as the response values. The quadratic prediction equations of compressive strength were established and verified through significance analysis, variance analysis and the comprehensive analysis of response surface figure, and XRD, SEM and FT-IR methods were applied to analyze the component and microstructure of geopolymer. The results showed that the response surface method was more accurate to optimize the ratio of geopolymer injection paste. The concentration of activator became the most important factor affecting the compressive strength, and the interaction between activator concentration and liquid-solid ratio was significant. The coexistence of C-(A)-S-H and N-A-S-H multi-gels appeared in the alkali-activated slag-fly ash system. The coagulation and hardening of the gel phase provided strength for the harden paste. With the extension of the age, the gel content increased, the microstructure of the system became denser, and the macroscopic mechanical properties were further improved. Considering the development of slurry strength and construction performance, it was concluded that when the dosage of slag and fly ash was 9∶1, the modulus and concentration of activator were 1.2 and 15%, respectively, and the liquid-solid ratio was 0.6, the comprehensive performance of geopolymer grouting material was the best. The research could provide a reference for the engineering application of geopolymer grouting materials.
- geopolymers,
- response surface method,
- optimization of mix proportion,
- compressive strength,
- microstructure

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References(20)

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