T60 CSA-Based Concrete Expansive Agent is a polymer-enhanced, low-alkali shrinkage-compensating admixture that generates ettringite through hydration to offset concrete drying shrinkage, enabling crack-resistant, waterproof, and joint-free structures
Advanced CSA expansive technology via ettringite hydration
Polymer-modified for enhanced toughness and crack control
Low-alkali formula (≤0.75%) to prevent ASR and ensure compatibility
Ideal for self-waterproofing and anti-cracking in mass concrete
Supports joint-free construction up to 150m for efficient builds
Product Introduction
T60 CSA-Based Concrete Expansive Agent is a high-performance, calcium sulfoaluminate (CSA)-based shrinkage-compensating admixture enhanced with polymers for superior crack resistance and waterproofing. Its core mechanism involves rapid hydration to form expansive ettringite crystals (3CaO·Al2O3·3CaSO4·32H2O), which generate controlled volume expansion in the early stages (2-7 days) to offset drying and autogenous shrinkage, reducing tensile stresses and preventing cracks. With low alkali content (≤0.75%) and high compatibility, it's perfect for reinforced concrete in demanding applications like mass pours, ultra-long structures, and self-waterproofing projects, enabling joint-free casting up to 150m while boosting durability and impermeability.
Product Parameters
Test item | Indicator Requirements | |
| Type I | Type II | |
| Magnesium oxide content(%) | - | ≤5.0 |
| Alkali content(%) | - | ≤0,75 |
| Fineness | 80 μm square hole sieve 1.18 mm square hole sieve | ≥200 ≤0.5 |
| Setting time | Initial coagulation | ≥45 ≤600 |
| Restriction of expansion(%) | Water (7d) Air (21d) | ≥0.035 ≥0.050 ≥-0.015 ≥-0.010 |
| Compressive strength(MPa) | 7d 28d | ≥22.5 ≥42.5 |
Product Usage
T60 CSA-Based Concrete Expansive Agent is versatile for various concrete applications requiring shrinkage compensation, crack resistance, and enhanced waterproofing. Key uses include:
Shrinkage-Compensated Concrete Structures: Ideal for reducing drying shrinkage and preventing cracks in reinforced concrete, ensuring long-term dimensional stability.
Self-Waterproofing Concrete: Perfect for basements, subways, tunnels, and underground structures where impermeable, watertight performance is essential without additional membranes.
Mass Concrete Projects: Suitable for large-volume pours like raft foundations, dams, and reservoirs, minimizing thermal cracking and improving durability in high-heat scenarios.
Ultra-Long or Joint-Free Placements: Enables seamless casting up to 100–150 meters in slabs, floors, and bridges, eliminating the need for expansion joints and post-pour strips.
Water-Retaining Structures: Effective in tanks, pools, canals, and hydraulic engineering projects to enhance water retention and resist leakage over time.
Specialized Repairs and Joints: Used in cold joints, expansion joints, and post-tensioned concrete to compensate for settlement and improve bonding in repair works.
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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