Influence of Industrial Waste Gypsums in Excess-Sulfated Slag Cement: The Role of Wet Grinding
Pei Tang, Hai Yang, Shuai Zhou
TL;DR
This study explores how different industrial waste gypsums affect the performance of excess-sulfated slag cement, with wet grinding improving hydration and strength.
Contribution
The novel contribution is the investigation of various gypsum types and their impact on ESSC properties, enhanced by a wet grinding process.
Findings
High-pH FG gypsum improves early strength and water resistance in ESSC after wet grinding.
PG gypsum, due to high solubility, significantly enhances compressive strength after wet grinding.
Wet grinding increases particle activity and hydration reaction efficiency in ESSC.
Abstract
The rational utilization of industrial solid waste is an effective way to reduce environmental pollution. This study investigated the potential application of fluorogypsum (FG), flue gas desulfurization gypsum (FGD), phosphogypsum (PG), and titanium gypsum (TG) in the production of excess-sulfated slag cement (ESSC). It further investigated the effects of different types of gypsum on the performance and hydration process of ESSC through a wet grinding process. The results showed that as the pH value of the gypsum increased, the setting time of ESSC decreased, and hydration heat release occurred earlier. Phase analysis and microstructural characterization indicated that the type of gypsum affected the hydration rate, microstructure, and quantity of hydration products of ESSC, thereby influencing its compressive strength. To further improve the performance of ESSC, a wet grinding process…
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Taxonomy
TopicsConcrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Innovative concrete reinforcement materials