Product Data Sheet Safety Data Sheet Show all documents

Sikacrete® Gunite DP-4

DRY SPRAY GUNITE MORTAR FOR CONCRETE REPAIR

A one part, unaccelerated Portland cement based gunite mortar, with silica fume.

  • Ready for use, one component
  • Excellent workability
  • Rapid strength development
  • Very high density
  • Good adhesion to substrates
  • Formulated to minimise dust development
  • Can be applied in thicknesses of 25 to 200mm
  • W/C ratio can be maintained within 0.36 – 0.40
Product Data Sheet Safety Data Sheet Show all documents

Usage

A high performance repair mortar for dry spray application to concrete, stone and mortar substrates. Suitable for:
  • New construction
  • Repairs and maintenance work
  • Levelling of large areas

Advantages

  • Ready for use, one component
  • Excellent workability
  • Rapid strength development
  • Very high density
  • Good adhesion to substrates
  • Formulated to minimise dust development
  • Can be applied in thicknesses of 25 to 200mm
  • W/C ratio can be maintained within 0.36 – 0.40

Packaging

25kg bags

Colour

Powder        Grey

Product Details

Product Information

Chemical Base

Cement and crystalline free silica aggregate

Shelf Life

12 Months

Storage Conditions

Store in a dry area between +5°C and +30°C. Protect from direct sunlight.                  

Density

  • Dry Bulk density 1.6 kg/litre
  • Mixed density 2,4 kg/litre

Maximum Grain Size

Dmax: 4mm
Technical Information

Compressive Strength

1 day

3 day

7 day

14 day

28 day

30N/mm2

39N/mm2

47N/mm2

55N/mm2

62N/mm2

Application

Application Information

Ambient Air Temperature

Min. 5°C – max. 35°°C.

Substrate Temperature

Min. 5°C – max. 35°°C.
Consumption

Yield

Depending on the substrate texture, whether sprayed vertically or overhead and the thickness of the coating. Generally allow 240 – 250 kg/m2 per 100mm.
Volume Yield: ~11,0 litres per 25kg bag.
Application steps

MIXING

Sikacrete® Gunite DP-4 may be applied using a dry-spray gunite machine. Place the dry Sikacrete® Gunite DP-4 straight into the hopper of the gunite machine. The desired water content is added and adjusted at the nozzle.

APPLICATION

Sikacrete® Gunite DP-4 may be applied using various types of small dry-spray gunite equipment.

Sikacrete® Gunite DP-4 is applied in layers to the prepared substrate (not in one pass) to build up to the maximum thickness required. As soon as the final coat has been applied strike-off the gunite mortar with a straight edge to required finish level.
Sikacrete® Gunite DP-4 cures with minimal shrinkage under moderate weather conditions. Where the work is exposed to intense sunlight, heat or strong air currents, the freshly prepared gunite mortar should be kept damp and prevented from drying out too rapidly. For optimum performance the material should be applied by an experienced nozzle man and good curing practices should be observed.
Do not re-use the rebound material - Discard it
For finishing purposes Sikacrete® Gunite DP-4 can be over coated with any of the Sika range of one component repair mortars. A final coat of Sikagard®-550W Elastic is recommended for optimum protection of the substrates.

CURING TREATMENT

Curing is important where ambient conditions may lead to rapid surface drying, the use of light water fogging for 48 hours or Sika® Antisol curing compounds are recommended. (Do not commence fogging until initial set has been reached)

CLEANING OF TOOLS

Remove uncured Sikacrete® Gunite DP-4 from tools and equipment with water. Cured material can only be removed mechanically.   

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