Shrinkage compensated, flowable, cementitious grout

dura.®grout CG is a ready-to-use, single component, shrinkage compensated, Portland cement-based grouting compound.

 

Uses
  • WIND FARM TURBINES: grouting and bedding of structural elements.
  • Grouting of cavities in horizontal spaces.
  • Grouting in confined spaces.
Application
  • Dustless, >80% dust reduction during handling/mixing.
  • Pumpable or gravity fed
  • Shrinkage compensated
  • Good cohesive properties without bleed or segregation
  • Application thickness 25 to 200 mm
  • Ready to use (pre-blended), only requires clean water to be added
  • Non toxic
Typical Properties

 

TYPICAL PROPERTIES

(@ 3.1 litres of water/25 kg bag)

Grout flow (flow trough EN 13395-2)
Grout flow at T3 min 620 mm
Grout flow at T30 min 310 mm
Expansion % (plastic phase) 0.60
Bleed % Nil
Compressive Strengths (MPa) @ 25 oC – (ASTM C109)
1 Day 30
7 Days 65
28 Days 86
Flexural Strength (N/mm²) @ 25 oC – (ASTM C190)
28 Days 12
Fresh wet density 2.25 g/cm3
Theoretical yield at 3.1 litres water added/25 kg ≈12.5 litres/25 kg
All results are based on controlled laboratory conditions. Variations may be experienced based on site conditions, site trials may be conducted to establish the consistency required.
Surface Preparation

Provision for the escape of entrapped air must always be made. Contact surfaces must be clean, sound and free from dust and shutter release oils. Concrete surfaces must be thoroughly pre-wetted at least 4 hours prior to grout placement. Any excess surface water (free water) must be removed prior to placing the grout.

Surface temperatures should not be less than 5 °C. Always ensure that the shutters are watertight and sealed to prevent suction of water from the product. Ensure that the grout delivery head is of adequate height in order to accommodate the distance the grout must flow. Always pour from one side thus ensuring that the grout fills the void without entrapping air.

Bonding/Priming

No primer is required, but in certain instances where structural bonding is required epidermix 344 wet to dry epoxy should be.

Mixing

Do not exceed the 3.1 litres water addition per 25 kg bag of dura.®grout WF. Mixes must always include complete bags, but more than one bag may be used provided that water quantities are adjusted accordingly to match the size of the mix.

Mixing of the grout may be carried out in a pan mixer, or by using a variable speed electric mixer fitted with a suitable helical paddle (typically a Festo RW 1000 EQ or larger). Do not use free fall drum mixers.

Add the required quantity of clean potable water to the mixing vessel. Then, while stirring continuously, slowly add the dry powder until the mix is homogeneous and free from any lumps. Mix for 3-5 minutes. Do not add any additional water to achieve fluidity as this will cause the grout to segregate and bleed.

CAUTION: High speed mixing will entrap air. If this occurs leave the grout to stand for a few minutes to allow the entrapped air to expel prior to application.

Coverage

One bag of dura.®grout WF will yield approximately 0.0125 m3 (12.5 litres) of grout when mixed with 3.1 litres water per 25 kg.

 

Application

Mixed grout should be poured into the cavity at one point only to avoid entrapping air. For best results, mixed grout must be poured within 10 minutes of mixing. If the grout is not placed immediately after mixing, keep the material agitated. Grouting mixture that stiffens up due to an extended time lapse or delay in placing must be discarded. Do not re-temper the grout.

dura.®grout WF can be compacted by gentle rodding or punning.

PUMPING
dura.®grout WF may be pumped with a positive displacement screw feed pump. The supply pipe diameter should be at least 25 mm. The process should be continuous, from one direction and the vents sealed consecutively, as progressed, in the direction of flow.

 

Cleaning

dura.®grout CG should be removed from tools and mixing equipment immediately after use and before material has set with clean water. Cured material can be removed mechanically.

Protection on Completion

Like all cement based materials dura.®grout WF must be protected from wind and/or high temperature, which can cause rapid drying. Cover exposed surfaces with damp sacks for at least 7 days (do not allow the sacks to dry out). Alternatively apply a suitable curing compound like Chryso Cure R or Chryso Cure WB curing compound. 

Temperature and Relative Humidity

Surface, ambient and water temperatures should not be less than 5 °C and rising. The ideal temperature range for application is between 20 ºC and 30 ºC.

Packaging

dura.®grout WF is supplied in 25 kg polyethylene lined paper bags. 

Handling & Storage

dura.®grout WF has a shelf life of 12 months if kept in a dry store in sealed bags. If stored in high temperature and in high humidity locations the shelf life may be reduced.

Health and Safety

dura.®grout WF is alkaline and should not be allowed to make contact with skin and eyes. Avoid inhalation of dust during mixing by wearing dust masks. The use of gloves, eye protection and dust masks is advised. Immediately wash with water in the event of contact with skin. Splashes into eyes should also be washed immediately with plenty of clean water and medical advice sought

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® Construction Chemicals endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied – accept any liability either directly or indirectly arising from the use of a.b.e.® products, whether or not in accordance with any advice, specification, recommendation, or information given by the company.

Further Information

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements. a.b.e.® Construction Chemicals has a wealth of technical and practical experience built up over years in the company’s pursuit of excellence in building and construction technology.