The characteristics of sulfoaluminate cement include
Release time: 2025-04-16
The characteristics of sulfoaluminate cement mainly include high early strength, fast setting time, low liquid phase alkalinity
The characteristics of sulfoaluminate cement mainly include high early strength, fast setting time, low liquid phase alkalinity, excellent frost resistance and corrosion resistance, strong impermeability, and low free expansion rate.
Core feature analysis:
Early high intensity
The 3-day compressive strength of sulfoaluminate cement can reach 50-70 MPa, and it can reach the 28 day strength level of Portland cement in 12 hours to 1 day. It is suitable for emergency repair projects and rapid construction.
Fast setting time
The initial setting time of fast hardening sulfoaluminate cement is about 25 minutes, the final setting time is 180 minutes, and the demolding time is short (4-5 hours), significantly improving construction efficiency.
Low alkalinity in liquid phase (pH value 10.5~11.5)
The alkalinity of its hydration liquid phase is lower than that of Portland cement, making it suitable for preparing glass fiber mortar (GRC products) and having a lower risk of steel corrosion.
High frost resistance
In an environment of 0 ℃~-20 ℃, adding a small amount of antifreeze can facilitate normal construction. The strength of concrete can reach 70%~80% of the design grade after 3-7 days, and the strength loss is not significant after 200 freeze-thaw cycles.
Excellent corrosion resistance
It has extremely strong resistance to corrosive media such as seawater, chloride salts, and sulfates, with a higher corrosion resistance coefficient than high sulfur resistant Portland cement and high alumina cement.
Strong impermeability
The structure of cement stone is dense, and its impermeability is 2-3 times that of the same grade of Portland cement concrete, making it suitable for underground engineering and scenarios with high impermeability requirements.
Low free expansion rate (small shrinkage)
Ordinary sulfoaluminate cement shrinks less in air, while self stressing sulfoaluminate cement can achieve controllable expansion by adjusting the formula to meet different engineering needs.
Application scenario example:
Emergency repair project: Utilizing the early high strength characteristics to quickly repair road surfaces or building structures.
Winter construction: relying on frost resistance for normal construction in low temperature environments.
GRC products: low alkalinity characteristics protect glass fibers and extend product life.
Marine engineering: The resistance to seawater corrosion is suitable for the construction of docks, breakwaters, and other structures.
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