Superplasticizer Fosroc Conplast Sp440, Packaging Size: 250 kg

Product Details

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. Advantages   Improved workability - Easier , quicker placing and compaction.   Increased strength - Provides high early s tr e n g th fo r 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 prestressed concrete and with sulphate resisting cements and marine aggregates. Standards Conplast SP440 complies with IS:9103:1999 and BS:5075 Part 3 .Conplast SP440 conforms to ASTM-C-494 Type ‘D' and Type ‘G' depending on the dosages used. Description Conplast SP440 is a blend of organic polymers and is supplied as a brown liquid instantly dispersible in water. Conplast SP440 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 Specifi c Gravity : 1.17 to 1.19* pH at 270C : Minimum 6* Chloride content : Nil as per IS:456 and BS:5075* Air entrainment : Approx. 1% additional air is entrained * The uniformity parameters like specifi c gravity, pH, chloride content etc. will vary for specifi c customer requirements and mix design. Please refer our MTC issued for specifi c product confi guration for measuring our product parameters that will be constantly and consistently administered. Conplast SP440 Compatibility : Can be used with all types of cements except high alumina cement. Conplast SP440 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 fl owing 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 fi nish. 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. Application instructions Dosage Trials need to be carried out at site to optimise the dosage of the admixture for the particular mix design and materials. However as a guide the rate of addition is generally in the range of 0.5% to 1.2% by weight of cement for normal grades of concrete. A dosage of upto 1.5% may be used depending on the mix design and to achieve specifi c slump requirements. Use at other dosages Dosages outside the typical ranges quoted above can be used to meet particular requirements. Contact Fosroc for advice. Over dosage An overdose of above the recommended level of admixture may result in high workability, slight increase in air entrainment and retardation of settingtime. The ultimate strength of the concrete will not be adversely affected and will generally be higher than for normal concrete if properly placed and cured. Dispensing The measured quantity of Conplast SP440 should be added along with the gauging water. For best results, add Conplast SP440 in the last phase after prewetting the mix with 80% of the total water required.