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Rapid-hardening sulfoaluminate cement—low-alkali, micro-expansive, fast-drying, and quick-setting
Main business：Building, infrastructure, industrial, mining, marine engineering, military engineering, expressway, tunnel, bridge, concrete repair, installation of large-scale mechanical equipment, wind power equipment, foundation bolt fixing, etc. High-performance, early-strength, micro-expansion, self-compacting, large-flow leveling, rapid repair cement grouting material
- Commodity name： Rapid-hardening sulfoaluminate cement—low-alkali, micro-expansive, fast-drying, and quick-setting
- Description
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1. Packaging and Logistics Delivery Date Guarantee
Packaging Three-ply film-composite bag Specifications 25KG/ bag Volume 60*40*15 cm³ Minimum order quantity 1000KG Minimum order quantity Delivery date 1-7 Workday Shelf life Dry and well-ventilated 180 days Transaction method FOB/EXW Payment method Telegraphic Transfer / Letter of Credit Ship goods FOB Shanghai / Ningbo 2. Product Description
Fast-hardening sulfoaluminate cement is a special type of cement characterized by ultra-high early strength and exceptionally rapid setting and hardening. By adjusting its formulation, it can meet the requirements of various applications, including waterproofing and leak sealing, rapid emergency repairs, expansion joint repairs, structural component casting, and artistry molding. Certified by the National Building Materials Testing Center, its performance metrics exceed those specified in GB 20472-2006 standard.
3. Technical Indicators
Number: SK0188
Manufacturing Unit: Wuxi Jianghuai Building Materials Technology Co., Ltd. Batch number: R.SAC-20250301-50T Production date: March 1, 2025 Specification: 25 kg / 50 t Cement types Rapid-hardening sulfoaluminate cement Codename SK Strength Grade 42.5R Quantity 50T Mixed stone name Anhydrite: 18% limestone content:
6% dosageFactory serial number SK0188 Inspection items (%) Standard value Measured value Specific surface area m²/kg 400 410 Fineness (%) ≤10 0.35 Standard Consistency (%) / 0.38 Alkali content Potassium oxide / 0.10 Sodium oxide / 0.23 Stability Qualified Qualified Condensation
TimeInitial setting time (may occur earlier or later depending on ambient temperature) ≥5 6 Final setting time (may be earlier or later depending on ambient temperature) ≤30 9 Intensity
(MPa)Flexural strength 1 day ≥6.0 6.0 Compressive strength 1 day ≥30 31.8 Flexural strength 3 days ≥6.5 6.7 Compressive strength 3 days ≥42.5 43.1 Result This product has been tested and found to comply with the national standard GB20472-2006. Note: Before use, the surface must be sprayed with water to moisten it; after final setting, curing is required. 4. Core Technical Parameters
★ Specific Surface Area: The specific surface area shall be no less than 400 m²/kg.
★ Setting time: Initial setting no earlier than 25 minutes, final setting no later than 180 minutes; subject to change upon user request.
★ The alkalinity pH value shall not exceed 10.5.
★ Free Expansion Rate: 28-day free expansion rate 0.00%–0.10%
5. Core Advantages
Performance Features
● Rapid hardening and early strength:
Its 12-hour strength can exceed 20 MPa, and its strength after 1 to 3 days can reach the 28-day strength of ordinary cement (e.g., the compressive strength of Grade 42.5 cement after 3 days ≥ 42.5 MPa), making it ideal for emergency repairs and rapid construction.
● Micro-expansiveness:
During the hardening process, a slight expansion occurs (expansion rate: 0.02%–0.1%), which can compensate for shrinkage and reduce cracking, making it particularly suitable for waterproofing and impermeability projects.
● Low heat of hydration:
The hydration exotherm has a low peak and a rapid exothermic rate, with a high proportion of heat released during the early stage (1–3 days) and relatively little heat released in the later stages. This makes it suitable for construction in low-temperature environments; however, for large-volume projects, careful temperature control during the early stage is essential.
● Strong frost resistance and impermeability:
It features a dense structure and outstanding resistance to freeze-thaw cycles, with a waterproofing grade of P12 or higher. It is suitable for applications in humid environments, areas subject to freeze-thaw cycles, or scenarios with specific waterproofing requirements.
● Good corrosion resistance:
It exhibits strong resistance to aggressive media such as sulfates and seawater, outperforming ordinary Portland cement. It is suitable for use in corrosive environments like seaports and chemical plants.
● Low alkalinity:
The alkalinity (pH value around 10–12) of the hydration products is lower than that of ordinary cement, which can reduce the risk of alkali-aggregate reaction. It is suitable for special aggregate applications.
6. Application scenarios
● Emergency Repair Project:
Rapid repairs to roads, bridges, and airport runways—such as pothole filling and crack repair—can restore their functionality in a short period of time.
For emergency leak sealing in underground pipelines, tunnels, and other similar projects, its rapid hardening and slight expansion properties enable quick water stoppage.
● Construction engineering:
Winter-grade concrete (-10℃ and above can be used for construction)—no additional thermal insulation measures are required, allowing for early strength development and shortening the construction period.
Rapid production of prefabricated components (such as precast floor slabs, beams, and columns) to accelerate mold turnover efficiency.
● Waterproofing and Anti-seepage Engineering:
Waterproof concrete for basements, pools, and reservoirs, or used as waterproof mortar for kitchens, bathrooms, and roof waterproofing.
Self-stressing pipes (such as water conveyance pipelines) are manufactured using a micro-expansive material to generate pre-compressive stress, thereby enhancing crack resistance.
● Special Environmental Engineering:
Concrete structures in marine environments such as harbors and docks, or corrosion-resistant flooring and equipment foundations in chemical plants.
For projects with a risk of alkali-aggregate reaction (such as those using reactive aggregates), low alkalinity can reduce the associated hazards.
● Functional materials:
Prepare early-strength grouting materials and anchoring agents (such as those used for fixing the base bolts of mechanical equipment) to ensure rapid load-bearing capacity.
It is used in combination with fiber composites to produce crack-resistant mortar for wall plastering or thin-layer reinforcement.
Fast-hardening sulfoaluminate cement boasts core advantages of "fast hardening, early strength, and slight expansion," making it particularly suitable for time-sensitive projects, as well as applications requiring impermeability, corrosion resistance, or operation in special environments. It is one of the preferred cement types for emergency repairs and functional buildings.
7. Construction Scenarios
8. Precautions for Use
Construction environment temperature: -5°C to 35°C. The water-to-cement ratio is an important performance indicator for this product. Please add water according to the manufacturer’s specified water-to-cement ratio, and use mechanical mixing equipment to ensure thorough and uniform blending before construction! If the water-to-cement ratio is improperly adjusted, it may affect the product’s performance. This product is a finished item—do not add any other substances arbitrarily, as this could damage the product’s functionality and quality system! If this product has expired, it should be properly disposed of and no longer used. Any leftover material after mixing that has not been fully used must never be mixed with fresh material for further use! When carrying out outdoor construction in rainy weather, a rain shelter must be set up. The mixed material must be used within 30 minutes; once the initial setting time has passed, the slurry will begin to set and lose its effectiveness! Once the package is opened, the contents must be used up in one go to prevent moisture absorption and clumping.
9. Reasons to Choose Us
- Our company has a professional technical R&D team that provides free assistance in resolving all technical challenges you may encounter during construction.
- The raw materials used in our company’s products undergo rigorous screening, and we carefully select imported admixtures that are scientifically proportioned. The quality tolerance for the three-stage processing does not exceed one-thousandth, ensuring that their functional characteristics meet the diverse application requirements of our customers.
- High cost performance: Choose our company’s products. You’ll save 50% on labor, 50% on materials, and 50% on time—boosting construction efficiency and delivering significant economic benefits. We’ll ensure the quality of your project, giving you peace of mind and eliminating any future worries.
- Provide third-party type test reports, certificates of conformity, warranty certificates, special invoices, MSDS, and TCIR.
- Qualification certifications: CCC, CMA, CNAS, ISO9001, CE/FCC; Product implementation standard: GB/T 20472-2006
- We have successful track records in the supply chain for large-scale onshore and offshore wind power projects both domestically and internationally. Quality commitment guaranteed!
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