Fosroc Conplast SP500
High performance water reducing and super plasticising admixture for micro-silica concrete:
To produce pampable concrete,high strength,high grade concrete by substantial reduction in water resulting in low permeablity and high early strength.To produce high workability concrete requiring little or no vibration during placing.
Advantages:
- To produce pumpable concrete
- To produce high strength, high grade concrete by substantial reduction in water resulting in low permeability and high early strength
- To produce high workability concrete requiring little or no vibration during placing
- Improved workability - Easier, quicker placing and compaction.
- Increased strength - Provides high early strength for precast concrete if water reduction is taken advantage of
- Improved quality - Denser, close textured concrete with reduced porosity and hence more durable
- Higher cohesion - Risk of segregation and bleeding minimised; thus aids pumping of concrete
- Chloride free - Safe in pre-stressed concrete and with sulphate resisting cements and marine aggregates.
Standards:
Conplast SP500 complies with IS:9103:1999 and BS:5075 Part 3 .Conplast SP500 conforms to ASTM-C-494 Type 'G'.
Description:
Conplast SP500 is based on Sulphonated Napthalene Polymers and is supplied as a brown liquid instantly dispersible in water.
Conplast SP500 has been specially formulated to give high water reductions upto 25% without loss of workability or to produce high quality concrete of reduced permeability.
Properties:
- Specific gravity : 1.250 - 1.270 at 27°C
- pH at 27°C : Minimum 6
- Chloride content : Nil to IS:456
Compatibility :
Can be used with all types of cements except high alumina cement. Conplast SP500 is compatible with other types of Fosroc admixtures when added separately to the mix. Site trials should be carried out to optimise dosages.
Workability :
Can be used to produce flowing concrete that requires no compaction. Some minor adjustments may be required to produce high workable mix without segregation.
Cohesion :
Cohesion is improved due to dispersion of cement particles thus minimising segregation and improving surface finish.
Compressive Strength :
Early strength is increased upto 40% if water reduction is taken advantage of. Generally, there is improvement in strength upto 20% depending upon W/C ratio and other mix parameters.
Durability :
Reduction in W/C ratio enables increase in density and impermeability thus enhancing durability of concrete.
