Views: 0 Author: Site Editor Publish Time: 2026-01-22 Origin: Site
In South America, coastal salt spray, tropical high temperatures, heavy rainfall, and seismic activity pose common challenges to concrete structures, such as early cracking, chloride ion corrosion, insufficient compressive strength, and reduced durability. Owners and contractors seek both extended service life and lower maintenance costs while reluctant to significantly increase material or construction expenses. To substantially enhance concrete strength and durability without altering construction processes, selecting appropriate concete admixtures emerges as the most cost-effective solution.
Advantages: As concrete admixture,it enhances compressive strength and chloride ion resistance, improves matrix compactness, suitable for structures with high durability requirements such as harbors and bridges.
Disadvantages: Excessive dosage may affect workability, requiring adjustment of slump with superplasticizers.
Advantages: The extremely small particle size can fill fine pores, significantly enhancing early strength and microscopic density, making it suitable for high-performance concrete (HPC).
Disadvantages: High cost, high requirements for dispersion, and the need for specialized mixing processes.
Advantages: It is new type concrete admixture,By reducing the water-cement ratio, it enhances 28-day and long-term compressive strength while maintaining workability, making it the preferred conventional additive for strength improvement.
Disadvantages: Compatibility tests are required between the admixture and cement, mineral admixtures.
Advantages: Significantly enhances tensile, impact, and crack resistance performance, suitable for industrial floors, seismic-resistant components, and airport runways.
Disadvantages: It affects pumping construction, and costs need to be coordinated with reinforcement design.
Advantages: Enhances long-term strength and impermeability through secondary hydration, offers high cost-effectiveness, and improves workability.
Disadvantages: The early strength development is relatively slow and requires combination with early-strength agents or nanomaterials.
Advantages: Accelerates early strength development, shortens formwork removal and curing cycles, suitable for cold or time-sensitive construction conditions.
Disadvantages: Certain components may affect durability or steel corrosion resistance, requiring careful selection.
Note: The following is a typical range; the actual values shall be determined based on the supplier's technical data sheet (TDS) and test results.
Name | Dosage | Primary effects |
silica fume | SiO2 content: 85–95% Specific surface area: 15,000–30,000 m²/kg Recommended dosage: 5–10% (by mass of cement) | Enhance 28-day and long-term compressive strength, reduce porosity |
Nano silica dioxide | Particle size: 10–100 nm Recommended dosage: 0.5–3% (by mass of cement or weight of water) | significantly enhance early strength and improve microstructure |
PCE superplasticizer | solid content: 20–50% Water reduction rate: 20–35% Recommended dosage: 0.2–1.5% (by weight of cement) | reduce water-cement ratio, enhance fluidity and strength |
Fly ash (Class I/Class II) | Activity levels: low to medium-high Recommended dosage: 10–30% | long-term strength enhancement, cost optimization, and improved durability |
Steel fiber / Polypropylene fiber | Length: 6–30 mm (short-cut steel fibers); 6–12 mm (PP fibers) Dosage: 5–40 kg/m³ (steel fiber); 0.3–1.0 kg/m³ (PP fiber) | Enhance tensile strength, crack resistance, and impact toughness. |
PCE+silica fume (or slag) combination is recommended as a priority, taking into account both early and long-term performance.
PCE+nano silica or early strength agent combination.
Add short cut steel fibers or PP fibers to the above combination.
Localized trial mixing is necessary:
flowability, early and long-term compressive strength, impermeability, and durability tests must be conducted on local cement, aggregates, and climate to ensure compatibility.
Please provide: project location (country/climate), cement and aggregate types, target strength and usage scenarios, expected dosage range.
We can provide free evaluation and technical formula and sample trial preparation suggestions.
Leave a message or add WeChat/WhatsApp:+86 136 3560 0651(please provide your contact information) for one-on-one technical consultation and sample support.
