RETARDING POWDER PCE · CSA CEMENT SYSTEMS
540P Retarding Polycarboxylate Superplasticizer Powder
Purpose-engineered for sulphoaluminate cement, where standard PCE admixtures often fail — 540P controls the fast early hydration of CSA cement without sacrificing your product’s final strength.
- ISO 9001 Certified Manufacturing
- Export to 60+ Countries
- Free Sample Available
- OEM & Private Label Supported
Overview
Sulphoaluminate (CSA) cement hydrates fast — which is exactly why it’s chosen for rapid-repair and fast-turnaround products. But that speed makes it notoriously difficult to formulate with a generic superplasticizer: standard PCE admixtures are consumed or deactivated almost immediately, giving you little working time and inconsistent flow from batch to batch.
540P is a retarding-type PCE powder molecule specifically designed for CSA cement chemistry. It targets and slows the early hydration of calcium sulfoaluminate, extending workable open time and reducing slump-flow loss — while only delaying (not reducing) early strength development. Strength recovers rapidly, typically catching up within 5–12 hours, with no impact on long-term strength.
Why Formulators Choose 540P
- 34% water reduction even in fast-hydrating CSA systems
- Controlled early hydration — targeted retardation of calcium sulfoaluminate gives your product real working/open time
- Strength delayed, not lost — early strength gain slows temporarily but catches up within 5–12 hours; final strength is unaffected
- Stable flow retention — significantly less slump-flow loss over time compared to generic PCE in CSA systems
- Powder format — same freight, storage, and freeze-protection advantages as our other powder grades
Technical Specifications
| Property | Value |
|---|---|
| Appearance | White to pale-yellow free-flowing powder |
| Main component | Polycarboxylate copolymer (PCE), retarding type |
| Solid content | 95% – 98% |
| pH (10% aqueous solution) | 6 – 9 |
| Water reduction rate | ≥ 34% |
| Recommended cement system | Sulphoaluminate cement (CSA) |
| Early strength recovery | Within 5–12 hours |
| Packaging | 25 kg paper bag with inner PE liner |
| Shelf life | 12 months in sealed dry storage |
Recommended Applications
- Rapid repair mortars
- Inorganic waterproofing & leak-plugging materials
- Pavement/road repair mortar
- High-strength grouting, pressure grouting, and bedding mortar (CSA-based)
- Any formulation built on a sulphoaluminate/CSA cement base
Need Formulation Support or Free Trial Sample?
Share your CSA cement grade, target open time and construction scenario. Our technical team can provide starting dosage suggestions and formulation guidance for your dry-mix products.
How it Works？
540P’s molecular structure is tuned to interact preferentially with calcium sulfoaluminate hydration products, moderating the rapid formation of ettringite that normally locks up flow within minutes in untreated CSA systems. This buys real open time for placement and finishing.
Because the retardation is targeted rather than blanket, early strength development resumes quickly once the initial hydration window passes — the product doesn’t “lose” strength, it simply arrives on a more workable schedule.
Packaging & Shipping
- Standard packaging: 25 kg paper bag with inner PE liner
- Pallet Options: 600 kg/pallet
- Storage condition: keep sealed in dry conditions away from moisture.
- OEM packaging and private label solutions available for qualified partners.
Frequently Asked Questions - FAQs
No. 540P delays early hydration to extend workability, but strength development resumes and typically catches up within 5–12 hours. Long-term (28-day) strength is not affected.
540P is specifically formulated for sulphoaluminate chemistry. For dual-binder systems combining OPC and CSA, our technical team can help you determine the correct blend ratio — contact us for formulation guidance.
Open time gains depend on your specific CSA cement source, dosage, and ambient temperature. We recommend running a trial batch with your exact mix design — request a sample and our technical sheet includes a suggested starting dosage.
CSA-based rapid repair systems are already popular for cold-weather and emergency repair due to fast strength gain. Contact our technical team for temperature-specific dosage recommendations.