CSA Expansive Agent
CSA-Based Expansive Agent for Shrinkage-Compensated and Watertight Concrete
CSA Expansive Agent is used in shrinkage-compensated concrete, watertight concrete, post-poured strips, grout and mortar systems where dimensional stability and curing control are important. It supports basements, tunnels, metro works and underground waterproofing applications.
Product Positioning
- Shrinkage compensation design
- Mortar, grout and concrete systems
- Dosage and curing discussion
- Trial-based technical support
Product Overview
Quick answer: CSA Expansive Agent is a high-efficiency mineral expansive admixture (CaO, calcium sulphate and calcium sulphoaluminate phases) that forms ettringite to deliver a controlled, restrained expansion for shrinkage-compensated concrete, grout and mortar. Typical dosage is 6-8% for shrinkage-compensating concrete and 9-10% for post-poured strips (subject to trial mix), with restrained-expansion grades CSA-I / CSA-II / CSA-III, specific surface area 250-400 m2/kg and moist curing of not less than 14 days. It is not recommended for continuous exposure above 80 °C.
CSA Expansive Agent is a mineral-based expansive admixture made from calcium sulphoaluminate clinker, calcium oxide and natural anhydrite according to supplied product information. It is used as a component in shrinkage-compensated cementitious systems.
It may support non-shrink grout, repair mortar, waterproof mortar, self-leveling compound and other dry mix systems when dosage, cement system, water amount, additives and curing condition are properly verified. Final performance depends on formulation design, raw materials, water amount, additives, curing condition and application method. For CSA Expansive Agent, the low-carbon value is connected with shrinkage-compensated and durability-focused cementitious systems, especially where dimensional stability can reduce repair risk over the service life.
Key Functions
Low carbon cement (low CO2 / sustainable)
Shrinkage compensation design
Dimensional stability support
Non-shrink grout formulation support
Repair mortar crack-risk reduction approach
Waterproof mortar formulation support
Dry mix mortar component design
Typical Applications
Non-Shrink Grout
Shrinkage-Compensated Mortar
Repair Mortar
Waterproof Mortar
Self-Leveling Compound
Concrete Post-Poured Strips
Anchoring Grout
Dry Mix Mortar Systems
Typical Technical Data
Typical values from supplied product information for High-Efficiency CSA Expansive Agent.
| Item | Typical Value / Supplied Information |
|---|---|
| Product type | High-efficiency CSA expansive agent |
| Appearance | Grey-white powder |
| Specific gravity | 2.8-3.0 |
| Specific surface area | 250-400 m²/kg |
| Recommended dosage direction | 6-8% for shrinkage-compensating concrete; 9-10% for post-poured strips, subject to trial mix |
| Moist curing reminder | Not less than 14 days according to supplied product information |
| Temperature reminder | Not recommended for continuous exposure above 80°C |
| Mineral composition direction | CaO, CaSO4 and calcium sulphoaluminate phase |
| Restrained expansion standard direction | CSA-I / CSA-II / CSA-III grades according to supplied information |
| Mortar strength at 7% internal addition | 7 d >40.0 MPa; 28 d >54.0 MPa in supplied information |
The above values are typical data from supplied product information. Final expansion and shrinkage compensation performance depends on cement system, dosage, water amount, additives, curing condition and testing method.
Typical Starting Dosage
Suggested starting points based on supplied product information.
| Application | Starting Dosage (% of total cementitious) |
|---|---|
| Shrinkage-compensated mortar / grout / concrete | 6-8% |
| Post-poured strips / higher expansion demand | 9-10% |
Starting point for formulation testing only. Over-dosage of expansive agent can cause harmful over-expansion in mortar or concrete. Final dosage must be verified by lab trial.
Directions for Use / Formulation Reminder
- Confirm dosage by trial mix; do not treat one dosage as suitable for every cement or mortar system.
- Moist curing condition is important for expansion development and dimensional stability direction.
- Check compatibility with cement, CSA binder, gypsum source, water reducer, polymer and other additives.
- Control water amount, sand grading, temperature and testing method during trial.
- Avoid application conditions that conflict with supplied temperature or curing recommendations.
Packaging and Storage
Packaging options can be discussed according to order quantity, shipping method and buyer handling requirements. Common options may include 25 kg bags and jumbo bags / bulk bags. Final packaging, palletizing, moisture protection, labeling and export documentation should be confirmed before order. Materials should be stored dry, covered and protected from moisture and rain.
Related Products
CSA Binder
View ProductCSA Cement
View ProductDry Mix Mortar Premix
View ProductCustomized Mortar Solution
View SolutionRelated Solutions
Shrinkage Compensation Solution
View SolutionNon-Shrink Grout Solution
View SolutionCrack Control Waterproof Mortar Solution
View SolutionSelf-Leveling Compound Solution
View SolutionFAQ
Is this a finished mortar product?
It depends on the product type. Binder and component products are used in formulation systems, while premix or mortar products still need project and application verification.
What information should I provide before requesting samples?
Please send your application, target performance requirement, local raw materials, water control needs, packaging requirement and destination market.
Does final performance depend on formulation?
Yes. Final performance depends on formulation design, raw materials, water amount, additives, curing condition and application method.
Discuss CSA Expansive Agent for Your Formulation
Send us your application, target performance requirement, local raw materials, packaging requirement and destination market. We will suggest a suitable product path for sample discussion and testing.
Send Your InquiryMechanism Explanation
CSA Expansive Agent should be evaluated as part of a complete cementitious system. Its effect is influenced by binder chemistry, sulfate balance, calcium source, water amount, aggregate grading, additives, curing condition and application method. For dry mix mortar and concrete-related products, trial testing should confirm setting behavior, workability, early strength target, shrinkage-related performance and final application suitability before commercial use.
Additional FAQ
Can this product be used without formulation testing?
No. Final performance should be verified by trial mix and testing because local raw materials, additives, water control and curing conditions can change the result.
Can you help compare this product with other binder options?
Yes. We can discuss the application, target performance requirement, local material information and packaging needs before suggesting a suitable product path for sample discussion.