Applications of Water-Reducing Agents and Defoamers in Dry-Mix Mortar
Release Time:
2016-05-30
Source:
Applications of Water-Reducing Agents and Defoamers in Dry-Mix Mortar
Applications of Water-Reducing Agents and Defoamers in Dry-Mix Mortar
I. Water-reducing admixture, dosage: 0.05–1%
An additive that can reduce the amount of mixing water while maintaining essentially the same mortar consistency.
1. Ordinary water-reducing agent
2. High-efficiency water-reducing agent
3. Early-strength water-reducing agent
4. Retarder and water-reducing agent
5. Air-entraining water-reducing agent
Retarding high-efficiency water-reducing admixture: reduces water demand and enhances the compactness of mortar and concrete.
II. Defoamer, dosage: 0.02–0.5%
Helps release entrained and generated air bubbles during mortar mixing and placement / enhances compressive strength / improves surface finish
1. Polyols
2. Polysiloxane
1. To burst the bubble
2. Preventing Foam Regeneration
3. Retarder, dosage: 0.1–0.4%
Reduce the hydration rate and heat of hydration of cement or gypsum, thereby extending the setting time.
1. Denatured protein
2. Citrate
3. Tartrate
4. Potassium hydrogen phosphate
Prolonged coagulation time
IV. Accelerator
An admixture that enables cement to set and harden rapidly
For use in shotcrete and concrete
