Terraroc HBR is a high build polymer modified repair mortar with fibre reinforcement suitable for concrete repairs up to 80mm on vertical surfaces and 40mm in overhead applications. Terraroc HBR is shrinkage compensated and is sprayable enabling fast repair.
Terraroc HBR is a blend of special cements, aggregates, plasticizers, polymers, fibres and shrinkage compensating additives with following properties:
Ready to use
Factory controlled mix design
Fibre reinforced ensuring high flexural strength
Polymer modified ensuring excellent adhesion
Specially formulated to allow repairs in vertical and overhead situations
Areas Of Use
• To repair damaged vertical concrete surfaces
• To repair damaged overhead concrete surfaces
Preparation of Surface
Do not apply at temperatures below 5oC. Remove all defective concrete back to the reinforcements, treat reinforcements with Epiprime ZR (see separate data sheet). Avoid feather edging. The repair area should be a minimum depth of 15mm. Thoroughly wet the surface with water and apply a coat of Terrabond A by scrubbing it well into the surface.
Allow it to become tacky before applying the Terraroc HBR.
Mixing Ensure that the mixing water is constant for each bag of compound (4.25ltr water/25kg Terraroc HBR). A mechanical mixer is necessary to ensure consistency of the final mix. Add the powder to the water and mix continuously for 3 to 5 minutes.
Application and Cleaning of Tools
Apply to the prepared substrate by trowel ensuring that it is well compacted onto the primed surface/reinforcements. Build up in layers until the desired thickness is achieved. Where very thick sections are required allow the initial layer of Terraroc HBR to set, scratch the surface to provide a mechanical key and prime with Terrabond A before applying the final layer of Terraroc HBR.
Finish using a steel float. Terraroc HBR should not be applied in layers less than 15mm thickness.
Clean tools and equipment with water after use.
Curing Terraroc HBR should be cured immediately after troweling is finished by applying Terrabond A to the surface. In harsh conditions the supplementary use of hessian or polythene must be used to ensure proper curing.