Research progress on hydration， properties， and durability of supersulfated cement
Journal Title: China Powder Science and Technology - Year 2025, Vol 31, Issue 2
Abstract
[Objective] To reduce energy consumption in the cement industry， this paper reviews and analyzes research findings on supersulfated cement （SSC）， which could contribute to the green and low-carbon development of the cement industry. Progress The primary research focus on SSC includes its hydration， performance， and durability. SSC is a new type of low-carbon cement composed of granulated blast furnace slag （GBFS）， gypsum， and an alkaline activator. The use of highly reactive GBFS in SSC effectively promotes hydration， while waste gypsum supports later-stage hydration and strength development. Different types of activators have varying effects on hydration promotion， and high-belite sulfoaluminate cement clinker has shown excellent performance in enhancing early strength development. Adding appropriate amounts of calcium formate and nano-SiO2 to SSC can further accelerate hydration reactions and improve early strength. SSC generally has a long setting time， good volume stability， and strong resistance to sulfate and acid attack. However， its poor carbonation resistance and freeze-thaw performance are significant obstacles to wider application. Conclusions and Prospects During the hydration process of SSC， different components play distinct roles in the cement’s hydration. High-activity slag powder is of paramount importance for the overall hydration performance of SSC. Solid-waste gypsum can contribute to better later-stage hydration. Moreover， various alkaline activators have an impact on the later-stage hydration degree. Among them， high-belite sulphoaluminate cement clinker as an alkaline activator shows promising application prospects.In terms of durability， SSC exhibits good resistance to sulphate and acid erosion. Nevertheless， its carbonation resistance and frost resistance are relatively poor， especially under insufficient curing conditions. Currently， adding an air-entraining agent and sodium lactate can improve the carbonation resistance， while adding admixtures like an air-entraining agent， sodium lactate， and sodium citrate can enhance the frost resistance. Further research is required to effectively improve these two aspects of durability. Once these issues are resolved， the main obstacles in its engineering application can be substantially overcome.SSC possesses excellent characteristics， including low hydration heat， good impermeability， high later-stage strength， and resistance to sulphate and acid erosion. Additionally， compared with traditional portland cement， SSC consumes less energy during the production process. However， the disadvantages of low early strength， poor carbonation resistance， and poor frost resistance have long restricted its engineering application.
Authors and Affiliations
Yongbo HUANG, Yuanhao SONG, Guangbin DUAN, Jingjun LI, Lele BA, Liang YU, Xuecheng WANG
Keywords
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- EP ID EP760557
- DOI 10.13732/j.issn.1008-5548.2025.02.011
- Views 26
- Downloads 0
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