Title:
Sulfoaluminate Cement: Gypsum-Quicklime Impact on Grouting Material (Prepublished)
Author(s):
Nathan S. Teah, Lin Liao, Yubing Zhao, Zhiling Liao, Wanwen Xue, Ruiqing Hao
Publication:
Materials Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
compressive strength; grouting material; gypsum; hydration product; quicklime; sulfoaluminate cement
DOI:
10.14359/51749382
Date:
12/11/2025
Abstract:
This study investigates the impact of the quicklime and gypsum ratio on the grouting material made of sulfoaluminate cement. Gypsum and quicklime were selected to verify that sulfoaluminate cement retained AFt. Sulfoaluminate cement's efficiency as a grouting material was evaluated using gypsum and quicklime. Sulfoaluminate cement with varying gypsum to quicklime ratios was subjected to tests for compressive strength, pH, setting time, expansion rate, X-ray diffraction (XRD), and scanning electron microstructure (SEM). The microstructure of the X-ray diffraction was investigated at 1d and 28d. The result obtained points to two key findings:
The retention of AFt was excellent (≥99%) regardless of the gypsum-to-quicklime ratio.
The retention of AFt without gypsum and quicklime depends on the sulfoaluminate cement; in this case, the setting time prolongs, leading to expansion strain.