https://orcid.org/0000-0002-7392-7849
Abstract
Rapid-setting belitic calcium sulfoaluminate (BCSA) cement has established advantages compared to portland cement in terms of environmental benefits, lower shrinkage, and faster strength gain. There is a dearth of experimental studies on practical applications of this cement. The aforementioned fast setting and low shrinkage of BCSA cement make it an ideal cement for underwater applications such as repairs or rapid construction. This study details preliminary mixture design guidance for proportioning an underwater repair mortar with BCSA cement that can self-consolidate underwater and achieve a compressive strength exceeding 28 MPa in 3 hours or less. By varying the sand-to-cement ratio (s/c) and water-to-cement (w/c) ratio, an acceptable mixture was achieved at a w/c of 0.42 and an s/c of 1.25. Observations on the effect of mix parameters on flow, compressive strength gain, and physical appearance of the specimens are also reported. Future work should investigate the interaction of this cement with different water-reducing and viscosity-modifying admixtures, as this was out of the scope of this study.
Issue Section:
Technical Papers
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