Product Data Sheet Safety Data Sheet Show all documents

Sikacrete®-502 Gunite

Very Rapid setting dry spray mortar

Sikacrete®-502 Gunite is a rapid hardening, prepacked shotcrete material for dry process applications. This product is preblended, prepacked, dry process shotcrete material powered by Rapid Set technology, containing blended aggregates and other carefully selected components. Sikacrete®-502 Gunite has greatly enhanced shooting charateristics providing greatly reduced setting times and very rapid strength development.

  • Very rapid early age strength development
  • Improved adhesion and cohesive plastic properties
  • Significantly reduced rebound, resulting in lower material useage
  • Superior ability to build greater thicknesses in a single pass in both vertical and overhead orientations
Product Data Sheet Safety Data Sheet Show all documents

Usage

Ground support applications for mining, tunneling and other underground openings Construction of underground bulkheads, backfill barricades, pillars, ventilation walls and other underground concrete structures  

Advantages

  • Very rapid early age strength development
  • Improved adhesion and cohesive plastic properties
  • Significantly reduced rebound, resulting in lower material useage
  • Superior ability to build greater thicknesses in a single pass in both vertical and overhead orientations

Packaging

25kg bags

Product Details

Product Information

Shelf Life

12 months

Storage Conditions

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

Maximum Grain Size

Dmax: 1mm
Technical Information

Compressive Strength

2 hours

1 day

7 day

28 day

21 Mpa

30 Mpa

40 Mpa

50 Mpa

Application

Application Information

Initial Set Time

5 minutes

Final Set Time

10 minutes

 
Consumption

Yield

~ 11.25 ltr per 25kg bag
Application steps

MIXING

Sikacrete®-502 Gunite may be applied using a dry-spray gunite machine. Place the dry Sikacrete®-502 Gunite straight into the hopper of the gunite machine. The desired water content is added and adjusted at the nozzle.

 

APPLICATION

Sikacrete®-502 Gunite may be applied using various types of small dry-spray gunite equipment.

Sikacrete®-502 Gunite is applied in layers to the prepared substrate (not in one pass) to build up to the maximum thickness required.
Sikacrete®-502 Gunite 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®-502 Gunite can be over coated with any of the Sika range of one component repair mortars

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

CLEANING OF TOOLS

Remove uncured Sikacrete®-502 Gunite from tools and equipment with water. Cured material can only be removed mechanically.   

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