Ultra-high toughness concrete (STC) is a high-strength, high-toughness cementitious composite material with a flexural strength of more than 22 MPa formed after mixing with water and setting and hardening of a dry mix made of cement, mineral admixture , fine aggregate, steel fibers, ultrafine powder, and admixtures, which has higher toughness compared to UHPC.
Keywords:
STC concrete,
High Toughness Concrete,
Bridge Deck Pavement
Steel bridge repair solution
Product Introduction
Ultra-high toughness concrete (STC) is a high-strength, high-toughness cementitious composite material with a flexural strength of more than 22 MPa formed after mixing with water and setting and hardening of a dry mix made of cement, mineral admixture , fine aggregate, steel fibers, ultrafine powder, and admixtures, which has higher toughness compared to UHPC.
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◆ Pharmaceutical Facility Flooring
◆ Food & Beverage Plant Coating
◆ Parking Garage Sealer
◆ Aircraft Hangar Floor Coating
◆ Retail Showroom Flooring
1. The combined structure substantially improves the bridge deck stiffness, thus effectively improving the asphalt surface layer stress state.
2. The STC layer is cement-based material with good temperature stability, which improves the working conditions of asphalt deck and greatly reduces the risk of damage such as failure of bond layer, rutting, and pushover.
3. It reduces the stress of steel panel and stiffening ribs under wheel load, and greatly improves the anti-fatigue life of steel bridge deck.
4. The high compactness of STC ultra-high toughness concrete layer makes the steel bridge deck in a good working environment and effectively reduces the risk of corrosion.
5.Rapid Deployment: Walkable in 18h, heavy traffic ready in 72h – 50% faster than epoxy alternatives 15.
Q:What makes STC different from UHPC or ECC?
A: STC combines high toughness and strain-hardening of ECC with structural-grade strength of UHPC.
Q:Can STC be used in earthquake retrofitting?
A:Yes, it is ideal for retrofitting columns, walls, joints, and beams in seismic zones.
Q:Is STC pumpable or shotcrete-compatible?
A:Yes, STC can be sprayed or pumped with standard equipment
Product Parameters
Indicators based on:DB43T1173-2016 “Technical specification for steel-ultra-high toughness concrete lightweight combined structure bridge deck”.
| Grade | STC22 | STC25 | STC28 |
| Standard value of compressive strength of cube (MPa) | ≥120 | ≥140 | ≥160 |
| Standard value of flexural tensile strength (MPa) | ≥22 | ≥25 | ≥28 |
| Axial tensile strength without reinforcement (MPa) | ≥7 | ≥8 | ≥9 |
| Compressive/tensile modulus of elasticity (GPa) | ≥37.6 | ≥40.7 | ≥43.5 |
| Ultimate tensile strain (%) | ≥0.2 | ||
| Ultimate tensile strength/elasticity section | ≥1.1 | ||
| Initial slump extension of tensile strength (mm) | ≥700 | ||
| 1h slump extension (mm) | ≥650 |
Every 1000kg/ton package, with copper-plated steel fiber 25kg/bag, shelf life of 3 months; must be stored in a dry and ventilated room, the bag is sealed, pay attention to moisture-proof, anti-freezing.
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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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