Renderoc HS Xtra

Shrinkage compensated, fibre reinforced, single component, polymer modified, cementitious, repair mortar system.

Uses:

Renderoc HS Xtra is suitable for hand and trowel application for repairs where high load bearing is required. Typical applications would include, but not be limited to, the following:

• • Vertical and overhead repairs to restore ‘coversheet’
  • General concrete and masonry repairs
  •  Voids greater than 10 mm deep
  • Repairs to honeycombing
  • Larger scale repairs where formwork cannot be erected

Advantages:

Renderoc HS Xtra features Dimensional Stability Technology – a new materials technology which controls the rate of drying shrinkage such that, when used correctly :
i. the dimensions of the repair remain stable; and thus
ii. eliminating failure, due to shrinkage cracking.

This in turn leads to a series of associated benefits:

• • Cost eff active shrinkage control enables repairs to be completed ‘right first time’
  • Enhanced durability – works in tandem with extremely low permeability to prolong eff active working life
  • Compatibility – aligns performance closer than ever before to that of host concrete
  • User friendly – specific Cally developed to provide an easy to-apply product, suitable for local conditions
  • Defi Nable performance – positive benefits are easily dem unstated via a single, simple measurement

Description:

Renderoc HS Xtra is a Dual Shrinkage expansion, fiber rein forced, single component, polymer modified, cementitious, repair mortar system supplied as a ready to use blend of dry powders, which requires only the addition of clean water to produce a highly consistent, repair mortar suitable for structural concrete and masonry repairs. Renderoc HS Xtra may be hand & trowel applied, please see application method statement for details.

Properties

The following typical results were obtained at a water to powder ratio of 0.16 or 4 ltrs/ 25 kg bag of Renderoc HS Xtra.

Application Instructions

Surface preparation

Saw cut or cut back the extremities of the repair locations to a depth of at least 10mm to avoid feather edging and to provide a square edge. Break out the complete repair area to a minimum depth of 10mm up to the saw edge.Clean the surface and remove any dust, unsound or contaminated material, plaster, oil, paint, grease, corrosion deposits or algae. Where breaking out is not required, roughen the surface and remove any laitance by light scabbling or grit
sand blasting. Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser.The eff activeness of decontamination should then be assessed by a pull off test. For vertical renders the concrete substrate should have surface profile of min 500 microns.

Anti-corrosion Protection to Reinforcement

It is likely that, steel reinforcement in the area around a patch repair, particularly in a chloride contaminated environment, will typically corrode after the repairs are carried out, referred to as the incipient anode or Halo effect.Berger Fosroc Nitozinc Primer, two component, zinc rich epoxy based anti-corrosive protective coating should be brush applied over the prepared & dry surface of the exposed rebars and allowed to completely dry prior to application of Renderoc HS Xtra repair mortar.

Application of Epoxy Bonding Agent

Mix the base and hardener components of Nitobond EP, two component epoxy bonding agents with a paddle mixer for 3-5 minutes and brush apply in a thin layer over the prepared old constructive solutions Renderoc HS Xtra concrete substrate to be repaired and allow the epoxy bonding agent to become tacky. Tacky condition will exist from 1-2 hours @30oC from the application time.

Estimating
Packaging

Renderoc HS Xtra             : 25 kg bagsNitobond EP                      :1 & 4 litresYield                                  :13.4 litres per 25 kg bag

Storage
Shelf life

Renderoc HS Xtra has a shelf life of 6 months; if kept in a dry environment, in its original, unopened packing. If stored in conditions of high humidity and/or temperature, the shelf life will be reduced.

Fire

Renderoc HS Xtra, is non-flammable and thus presents no fi re hazard.

Standards compliance

Renderoc HS Xtra repair mortar system complies with the fol lowing international standards :ASTM C157-93 :                       Test for drying shrinkage
DIN 1048 Pt. 5 :                        Test for permeability
BS 1881 Pt. 121 :                     Test for water absorptionFacebook Page Visit