Retarder for Calcium Sulphoaluminate cement
Keywords
retarder, calcium sulphoaluminate cement retarder, calcium sulphoaluminate cement
Product Introduction
A new type of calcium sulphoaluminate cement retarder, which belongs to powdered high molecular polymer, is mainly used to delay the hydration of calcium sulphoaluminate cement and prolong the setting time, and solve the problems of sulphoaluminate cement setting too quickly and being difficult to operate. This product will not produce chemical reactions with alkaline substances in sulphoaluminate cement. This product has good storage stability in dry-mixed mortar. The performance stability of dry-mixed products containing this product can be maintained for more than three months under the specified packaging and storage conditions.
Application
This product is mainly used to replace traditional acid retarders such as tartaric acid and citric acid. The retarding performance of dry-mixed products made by mixing acid retarders with sulphoaluminate cement will fail with storage time, causing the fluidity of dry-mixed products to lose too quickly, affecting construction time.
Technical indicators
Appearance: White or light white powder
Bulk density (kg/lm³): 750±100
pH (23℃) (20% aqueous solution): 8.0±1.0
Water content (%): ≤3
Recommended dosage (% of cementitious material mass) : 0.15~0.4
Performance characteristics
1. This product has a good effect of delaying the setting time of sulphoaluminate cement;
2. While acting as a retarder, this product also has a certain alkaline water effect, and the amount of water reducer can be appropriately reduced when used;
3. Storage stability in the special alkaline environment of sulphoaluminate cement;
4. The strength of the sulphoaluminate cement system will not be reduced while ensuring the retarding effect of the system;
5. Excellent use effect, solving the problem that other acid retarders (such as tartaric acid, citric acid, etc.) will produce acid-base reactions on the solid surface of sulphoaluminate cement and gradually fail;
6. Good compatibility with other additives.
Packaging and storage
1. Packaging: 25kg composite plastic bag or cardboard barrel packaging, with plastic bag inside to prevent moisture.
2. Storage: This product should be kept away from direct sunlight and rain in a cool, dry and ventilated place.
3. Storage stability can be maintained for 12 months.
4. After opening, the product should be used in time, and the unused product should be sealed in time to prevent the product from absorbing moisture and agglomerating.
Precautions
1. This product is a soluble powder, non-toxic, but not edible.
2. No pollution to the environment was found during use, but it should comply with the requirements of local environmental regulations when discarded or discharged.
3. When it comes into contact with the human body and eyes, it should be rinsed with clean water as soon as possible. If it causes allergies to some people, medical treatment should be sought in time.
4. The packaging of this product cannot be discarded casually and should comply with the requirements of local environmental regulations.
