MasterGlenium SKY 8379 - New generation polycarboxylic ether hyperplasticiser for high performance concrete
How does MasterGlenium SKY 8379 work?
MasterGlenium SKY 8379 has been primarily developed for applications in the premixed and precast concrete industries where the highest durability and performance is required in conjunction with improved workability and finishing.
MasterGlenium SKY 8379 is free from chlorides and complies with AS 1478.1 – 2000 Type HWR and ASTM C494 Types A and F. Conventional superplasticisers, such as those based on sulphonated melamine and naphthalene formaldehyde condensates, at the time of mixing, become absorbed onto the surface of the cement particles. This absorption takes place at a very early stage in the hydration process. The sulphonic groups of the polymer chains increase the negative charge on the surface of the cement particle and dispersion of the cement occurs by electrostatic repulsion.
Recommended uses :-
The normally recommended dosage rate is between 0.2-0.8 litres per 100kg of cementitious material (binder) depending on specific mix design and requirements. Other dosages may be recommended or used in special cases according to specific job conditions but the performance must be verified with trial mixes before committing to supply (consult your local Master Builders Solutions Technical Sales Representative).
What makes MasterGlenium SKY 8379 a unique solution?
MasterGlenium SKY 8379 is differentiated from conventional superplasticisers in that it is based on a unique carboxylic ether polymer with long lateral chains. This greatly improves cement dispersion. At the start of the mixing process the same electrostatic dispersion occurs as described previously but the presence of the lateral chains, linked to the polymer backbone, generate a steric hindrance which stabilises the cement particles capacity to separate and disperse. This mechanism provides flowable concrete with greatly reduce water demand.
What are the features and benefits of MasterGlenium SKY 8379?
- Flowable concrete with low water/cement ratio without segregation or bleeding
- Allows reduction of curing cycles – i.e. time or temperature
- Possibility of elimination of steam curing
- Less vibration required even in case of congested steel reinforcement
- Lessss labour required
- Improves concrete surface finish and texture
- Compared to traditional superplasticisers, the addition of MasterGlenium SKY 8379 will improve the physical properties and thus the durability of concrete