POLYBIT Polycrete ST

Polymer modified high strength cementitious repair mortar

  • Extra reinforced strength due to the presence of fibres
  • Shrinkage compensated
  • Suitable for high build applications

Features and benefits

Polymer modified high strength cementitious repair mortar. Polymer modified repair mortar, specially formulated by blending OPC with non shrinking additives, fibers, polymers and fillers for repairing of beams, columns and slabs.

Properties

Description

POLYBIT® POLYCRETE ST is specially formulated for columns, slabs and for repair of heavy structural concrete damages; repair of concrete in highly corrosive environments such as marine structures, sea walls port structures etc. Available pack size: 25kg bag.

Documents and downloads

How to use

SUBSTRATE PREPARATION

The surface of the concrete to be repaired should be sound, clean and uncontaminated. The decayed or damaged area should be saw cut, keeping the sides of the area as square as possible. Loose materials must be removed carefully using suitable means such as sharp tools or chipping hammer. If the reinforcement is corroded make sure that the back of the steel is completely exposed. Then clean the steel to bright metal condition.
Priming
a. Reinforcement steel: After cleaning, prime the reinforcement using zinc rich primer (Polyzinc*). Brush apply a continuous coat of Polyzinc to the dry steel. A second coat may be applied after 1-2 hours to cover all the pin holes.
b. Concrete: if the concrete damage is severe and is due to chloride attack, a bonding coat with Polybond EP*/ Polybond AC* is advisable before placing Polycrete ST to achieve optimum bond in the fresh and cured sections. To achieve optimum bond between fresh and cured section, Polycrete ST should be applied when the bonding coat is still tacky. For new concrete saturate the area to be repaired thoroughly with water prior to the application of the repair mortar.

APPLICATION

Polycrete ST can be mixed by mechanical means. Slowly add the Polycrete ST to 3.50-4.0L of clean gauged water (w/p ratio of 0.14 - 0.16 approx) working well to produce a smooth mortar. The consistency of the mix can be adjusted by the addition of more powder or water as necessary, depending on the temperature. Whilst the primer is still tacky, apply the mortar mix and compact well. Application can be done with trowel or a rubber hand glove to paste the material in place. Polycrete ST can be applied to desired thicknesses in layers on vertical and overhead surfaces. High build application can be achieved by using a formwork. While applying multiple layers, the previous layer should be crosshatched and allowed to set before applying the next coat. Polycrete ST can be applied to a thickness of 40 mm in one single application if the ambient temperature is less than 25°C and the weather conditions are normal. Due to the presence of rapid drying polymers, the repaired area shall be cured in accordance with good concrete curing practice by and protected from drying winds. Curing shall be done by non degradable type of curing compounds or wet hessian cloth. When cured with wet hessian cloth, the area shall be covered immediately with a high density polyethylene sheet which shall be taped to all edges. 

STORAGE & SHELF LIFE

Store in a cool, dry place and keep away from all sources of heat and sunlight. In tropical climates, store in air condition rooms. The shelf life is up to 12 months in unopened condition and if stored as per recommendations. Excessive exposure to sunlight, humidity and UV will result in the deterioration of the quality of the product and reduce its shelf life. 

Related articles

  • Bitustick Cool

    The Next Generation of Performed Bituminous Coatings 

  • Foundations and Roofing Systems

    Discover, feel and touch our systems, through our mockup simulation boxes 

  • Wet Areas and Flooring Systems

    Discover, feel and touch our systems, through our mockup simulation boxes 

  • Polycryl FR

    The Ultimate Fire Rated Coating Solution 

  • Polycryl PF

    Strong UV protection For Polyurethane Foam Roof  

  • Bituplus Ultra

    The Ultimate Torch On Membrane Range 

Related products

  • ${/content/heliux/adhesive/polybit/com/en/products/central-pdp#/polybit-polyzinc/SAP_0201WUP34GP2/searchResult.productFields.MainImageAltText}
    POLYBIT Polyzinc
    Single component zinc rich epoxy coating for the protection of steel reinforcement and metalwork against corrosion. 
  • ${/content/heliux/adhesive/polybit/com/en/products/central-pdp#/polybit-polybond-ac/SAP_0201VGP34GG3/searchResult.productFields.MainImageAltText}
    POLYBIT Polybond AC
    It is a single component, acrylic polymer based emulsion, designed as an admixture for cementitous mortars and screeds and as a bonding and curing agent for concrete and patch repairs. 

Frequently asked questions

It is not mandatory to use any bonding agent or primer for the new concrete. Only surface saturation is required with clean sweet water. But no logged water.

Acrylic/PVA/SBR/Epoxy based bonding agents are recommended depending on the condition of the substrate.

Yes. It is a shrinkage compensated product