Non-shrink Cementitious Grout
duragrout® is a ready-for-use (merely add water) Portland cement-based grouting compound. It contains graded siliceous aggregate and chemical reagents which prevent shrinkage during curing.
Consistency range at Flowable, Fluid, or Ram to suit application.
- Bedding: column base plates, machinery base plates, bearing plates, crane rails
- Grouting: anchor bolts, cables, starter bars, top steel
- Repairing: cavities in concrete
- Quickly develops placeable consistency
- Remains cohesive and does not segregate
- Does not shrink
A minimum clearance of 50mm is required between bed and base. For smaller areas where the flow will not be restricted, a limited minimum thickness of 25mm is recommended. When grouting anchor bolts, three times the bolt diameter is necessary. Smaller clearances should be grouted with one of the epidermix® range of epoxy compounds.
Provision for the escape of entrapped air must always be made. Contact surfaces must be clean, sound, free from dust and shutter release oils. Concrete surfaces must be thoroughly pre-wetted but 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.
|Bulk density (mix)||2 kg/L|
|Density (powder)||2.93 kg/L|
|Workability time @ 25 ºC||30 minutes|
|Physiological effect||As cement|
Bonding / Priming
No primer required but in certain Instances where structural bonding is required epidermix® 344 should be used.
All water contents apply to 25 kg pockets of duragrout®. Water quantities must be adjusted to match size of mix. Mixes must always use complete pockets, but more than one pocket may be used. Mixing of grout may be carried out in a pan mixer, drum mixer or by using a slow-speed electric drill fitted with a suitable paddle. Using the standard 25 kg pocket of grout, add 3,5 L of clean water to the mixing vessel. While stirring continuously, add the dry powder until the mixture is free from lumps. Then add further water (500 ml to 1 L), continue mixing until a smooth, creamy consistency is obtained. Total mixing time should be approximately three minutes. duragrout® used as a ram consistency – see mix design under “typical physical properties”.
The minimum depth of grout to qualify for extending with 13 – 16 mm clean stone is 100mm. The estimated water for a fluid (40 – 50 sec.) consistency, or less, is added to the mixer first followed by the dry grout. After mixing for 2-3 minutes, 12 liters of 13 – 16 mm clean stone should be added. After extending the grout, a lessening of flow of the mixed grout will be noted. Under no condition may any additional water be added to this mix as it would harm the quality of the matrix and the product will possibly bleed, shrink, and not perform to our satisfaction.
One bag of duragrout® will yield approximately 0.0125 m3 (12.5 L) of grout (4.5 litre water demand). Yield as per extending above 0.023 m3 (23 litres) of grout using 4.5 L water demand (LBD of stone of 1.2).
Mixed grout should be poured into the cavity at one point only to avoid entrapping air. For best results, mixed grout should be poured within 10 minutes of mixing and definitely within 30 minutes. If grout is not placed immediately after mixing, keep the material agitated. Grouting mixture more than 30 minutes old must be discarded. duragrout® can be compacted by gentle rodding or punning. It may also be applied by means of standard low pressure grouting pumps. Do not re-temper the grout should the consistency drop due to time lapse.
duragrout® 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, or with an inhibited acid etch.
Protection on Completion
Grout surfaces should be protected from wind or high temperature, which can cause rapid drying. Cover the surface with damp sacks. Do not allow the sacks to dry out; alternatively apply duracure SBC or duracure WB curing compound.
Temperature & Relative Humidity
Do not apply if surface temperature is below 5 °C.
General-purpose, non-shrink cementitious grout for precision grouting.
The grout will be duragrout®, a pre- packed, onecomponent, non-shrink, precision grout applied in accordance with the recommendations of a.b.e.® including curing with duracure SBC or duracure WB. The grout will have a minimum one-day compressive strength of 13 MPa.
duragrout® is supplied in 25 kg polyethylene lined paper bags.
Handling & Storage
duragrout® 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 & Safety
Product safety information required for safe use is not included. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The safety data sheet is available from your local a.b.e.® Construction Chemicals sales representative.
This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot accept any liability for application – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied.
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.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction technology.
Typical Physical Properties
Setting time @ 20 °C
|WATER CONTENT||CONSISTENCY||FLOW CONS||INITIAL SET||FINAL SET|
|4L/25 kg||Flowable||260 %||1hr 55 min||2 hr 55 min|
|4,5L/25 kg||Fluid||40 – 50 sec||2hr 30 min||3 hr 55 min|
Compressive Strength using 100mm cubes – MPa
|WATER CONTENT||1 day||3 days||7 days||28 days|
|4 L /25 kg||20||45||55||67|
|4,5 L /25 kg||13||35||45||60|
Tensile Strength by splitting 70mm diameter specimens – MPa
|WATER CONTENT||7 days||28 days|
|4 L /25 kg||5,4||5,9|
|4,5 L /25 kg||4,5||5,2|
Flexural Strength on specimens 100x100x500mm – MPa
|WATER CONTENT||7 days||28 days|
|4 L /25 kg||8,3||10,7|
|4,5 L /25 kg||6,7||8,4|
Adhesive Bond Strength on 12,5mm diameter deformed bars grouted into 50mm diameter steel pipes with 150mm embedment.
At seven days, bond strength between rod/grout/pipe exceeded the characteristic yield stress of the steel.
|Expansion of grout after|
Abrasion Resistance by Böhm test
|Actual||1,15 mm wear|
|Permissible||3 mm wear|
dura.®grout Used as a RAM Consistency
|Powder Mass||25 kg|
|Water Demand||3 liters|
|Yield||Approx. 12 litres|
|TYPICAL PHYSICAL PROPERTIES|
|Wet density||2,327 kg/litre|
|1 day||44 MPa|
|3 days||58 MPa|
|7 days||62 MPa|
|28 days||> 70 MPa|