A. Redispersible latex powder
Dosage 1-5%
Material definition:
The powdered thermoplastic resin obtained by spray-drying the high molecular polymer emulsion and subsequent processing
Main varieties:
1. Vinyl acetate and ethylene copolymer powder (VAC/E)
2. Terpolymer rubber powder of ethylene, vinyl chloride and vinyl laurate (E/VC/VL)
3. Terpolymer rubber powder of vinyl acetate, ethylene and higher fatty acid vinyl ester (VAC/E/VeoVa)
Feature usage:
1. Increase cohesion (film formation)
2. Increase cohesion (bonding)
3. Increase flexibility (flexibility)
B. Cellulose ether
Dosage 0.03-1%, viscosity 2000-200,000 Mpa.s
Material definition:
Made of natural fibers through alkali dissolution, grafting reaction (etherification), washing, drying, grinding and other processes
Main varieties:
1. Methyl hydroxyethyl cellulose ether (MC)
2. Methyl hydroxypropyl cellulose ether (MC)
3. Sodium carboxymethyl cellulose (CMC)
Feature usage:
1. Water retention
2. Thickening
3. Improve bond strength
4. Improve construction performance
C. Starch ether
Dosage 0.01-0.1%
Material definition:
Can affect the consistency of mortars based on gypsum/cement and lime / change the workability and sag resistance of mortars
Main varieties:
Often used in conjunction with cellulose ether
Feature usage:
1. Thickening
2. Improve construction
3. Anti-sagging
4. Slip resistance
D. Hydrophobic powder
Dosage 0.2-0.3%
Material definition:
Silane-based polymers
Main varieties:
1. Fatty acid metal salts
2. Hydrophobic rubber powder Hydrophobic/hydrophobic
E. Crack-resistant fiber
Dosage 0.2-0.5%
Material definition:
Composite with polystyrene/polyester as the main raw material into a new type/crack-resistant fiber for concrete and mortar/called the “secondary reinforcement” of concrete
Main varieties:
1. Alkali-resistant glass fiber
2. Vinylon fiber (PVA fiber)
3. Polypropylene fiber (PP fiber)
4. Acrylic fiber (PAN fiber)
Feature usage:
1. Crack resistance and toughening
2. Shock resistance
3. Freeze and thaw resistance
F. Wood fiber
Dosage 0.2-0.5%
Material definition:
Natural fiber insoluble in water and organic solvents/excellent flexibility/dispersibility
Main varieties:
Wood fiber length is generally 40-1000um/ can be used in dry powder mortar
Features
1. Crack resistance
2. Enhancement
3. Anti-hanging
G. Water reducing agent
Dosage 0.05-1%
An additive that can reduce the amount of mixing water under the condition of keeping the consistency of the mortar basically the same
1. Ordinary water reducing agent
2. High-efficiency water reducer
3. Early strength superplasticizer
4. Retarding superplasticizer
5. Air-entraining water reducer
Retarding high-efficiency superplasticizer Reduce water consumption/increase the compactness of mortar/concrete.
H. Defoamer
Dosage 0.02-0.5%
Help to release air bubbles trapped and generated during mortar mixing and construction/improve compressive strength/improve surface condition
1. Polyols
2. Polysiloxane (1. to burst the foam; 2. to prevent the regeneration of the foam)
I. Early strength agent
Dosage 0.3-0.7%
low temperature early coagulant
calcium formate
Accelerate cement hardening speed, improve early strength
J. Polyvinyl alcohol
A water-soluble film-forming binding substance
Polyvinyl alcohol powder
PVA 17-88/PVA 24-88
1. Bonding
2. Film formation
3. Poor water resistance
Used for interior and exterior wall putty, interface agent, etc.