Concrete Repair Mortars

Five Star* Repair Concrete

Shrinkage-compensated, high strength, flowing repair concrete

Five Star repair concrete is a pre-blended cementitious repair concrete which fully complies with the Highways Agency Specification for Highway Works and Department of Transport specification BD 27/86 for a high strength flowing concrete. Contains non-reactive aggregates and a low soluble alkali cement content. The repair concrete can be applied to a range of thicknesses, minimum 15 mm. Contains RHPC & PFA to clause 1702, 5 mm nonreactive carboniferous limestone to clause 1704, microsilica and shrinkage compensating agents.

Uses:

  • Repair of concrete to bridge structures to HA model specification BD 27/86
  • Replacement of concrete to beams and crossheads
  • Repair of car parks, buildings, balconies and stairs
  • Coastal structural repairs and seawall reconstruction
  • Repairing concrete columns, beams, walls and soffits
  • Infill concrete and anchorage of bolts to large bolt pockets
  • For use under base-plates where thick sections are required to be grouted – 75 to 500 mm

Features & Properties:

  • Repair of concrete to bridge structures to HA model specification BD 27/86
  • Replacement of concrete to beams and crossheads
  • Repair of car parks, buildings, balconies and stairs
  • Coastal structural repairs and seawall reconstruction
  • Repairing concrete columns, beams, walls and soffits
  • Infill concrete and anchorage of bolts to large bolt pockets
  • For use under base-plates where thick sections are required to be grouted – 75 to 500 mm

Technical Data:

The following test results were obtained in lab conditions at 20°C HA spec

Working time 45 – 60 minutes  
Set time 225 minutes  
Plastic density   2200 kg/m3  
Water/cement ratio (3·3 litres per 25kg) 0·37 max 0·4

 

 Flow trough  
 at 5°C immediately after mixing 750 mm in 5 sec
750 mm in 30 sec
 at 5°C 30 minutes after mixing 750 mm in 6 sec
 at 20°C immediately after mixing 750 mm in 5 sec
750 mm in 30 sec
at 20°C 30 minutes after mixing 750 mm in 6 sec
Flow in simulated soffit and top repair At 5°C and 20°C Complies

 

 Compressive strength BS 6319: Pt 2  5°C  20°C  
 1 day    16 N/mm2   
 3 days    35 N/mm2   
 7 days    45 N/mm2  
10 days 35 N/mm2   min 29 N/mm2
28 days   65 N/mm2 min 50 N/mm2

                
Cement content 500 kg/m3 min 400 kg/m3
Air content 2·8% max 7%
Tensile strength BS6319: Pt 7 (7 days) > 4 N/mm2
Bond strength > 2·5 N/mm2 (failure of concrete)
Static modulus of elasticity 28 – 32 kN/mm2
Coefficient of thermal expansion 6 – 10 x 10–6 mm/mm/°C
Coefficient of chloride ion diffussion 1·5 – 2·5 x 10–13 cm2 s–1

Technical data:

Weber’s Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.


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12 Fenlake Business Centre, Fengate, Peterborough , PE1 5BQ

01733 560362

sales@concreterenovations.co.uk

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