Sika® Intraplast N 15 kg

$175.39 / BAG
Sika® Intraplast N is a balanced powder blend of expanding, fluidifying, and water reducing agents for Portland cement grouts. It does not contain calcium chloride, nitrates, or other chemicals potentially dangerous as to promote corrosion in prestressed steel. It is useful as a normal set grouting aid for cement to increase fluidity and produce a slow, controlled expansion prior to hardening. It can also be used for grouting stressed tendons, machinery bases, pre-placed aggregates, rocks, fissures, and more.
• Produces an extremely fluid, workable, low bleeding, non-settling, cohesive grout. It can be used with all types of grout incorporating Type GU, MS, MH or HE cements with or without pozzolanic materials or fine aggregate • Normal set grouting aid for cement to increase fluidity and produce a slow, controlled expansion prior to hardening. For grouting stressed tendons, machinery bases, preplaced aggregates, rocks, fissures, etc.
Form work: Forms should be tight and well fitted. Expansion should be restrained to produce highest possible density, bond and strength. Top forms should be used where there are open areas. Unformed exposed surfaces will have a substantially lower strength for a limited depth. Pumping: Pumps and hose fittings must be watertight to prevent loss of water and subsequent clogging.
Add ingredients to high speed shear mixer in following sequence: Water, cement, (supplementary cementing materials if used), Sika® Intraplast®-N, sand as required. Mix thoroughly. Place with grout pump. Limit size of batches so placement can be completed within 60 minutes to obtain maximum expansion of grout in place. Do not add water to grout to increase flowability which has decreased. Keep water/cement ratio as low as possible, generally 0.45 or less. For grouting prestressed tendons, follow recommended practices of the Prestressed Concrete Institute. For grouting of rocks, fissures, pre-placed or natural aggregate, follow standard construction practices. Proportioning: Up to 1% by weight of cementitious material. Recommended starting dosage is 0.25 to 0.35%. Trial mixes should be made to determine the effects of cement type, w/c etc. Mixing should be done in accordance with the Prestressed Concrete Institute’s standards.