Shrinkage compensated, flowable, cementitious grout
duragrout WF is a ready-to-use, single component, shrinkage compensated, Portland cement-based grouting compound.
Uses
- Wind farm towers: grouting and bedding of structural concrete elements
- Grouting of cavities/joints in horizontal applications with duragrout WF-Horizontal
- Grouting of cavities/joints in vertical applications with duragrout WF-Vertical
- Grouting in confined spaces
Advantages
- 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 |
duragrout WF Vertical w/p ratio: 0.14 |
duragrout WF Horizontal w/p ration: 0.14 |
| Flow Test (maximum flow) (EN 13395-2) |
||
| Flow (T 3 minutes) | 550 mm | 520 mm |
| Flow (T 30 minutes) | 350 mm | 500 mm |
| Flow (T 60 minutes) | N/A | 430 mm |
| Set Time (EN 196-3) |
||
| Initial set | ≈260 minutes | ≈180 minutes |
| Final set | ≈440 minutes | ≈260 minutes |
| Compressive strength (MPa) (40 x 40 x 160 mm prisms – EN 196-1) |
||
| Age | Wet cure | Wet cure |
| 1 day | 30 | 31 |
| 3 days | 60 | 52 |
| 7 days | 72 | 70 |
| 28 days | 80 | 75 |
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 duragrout 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 duragrout 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.
duragrout WF can be compacted by gentle rodding or punning.
PUMPING
duragrout 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
duragrout 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 duragrout 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 duracure acrylic 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
duragrout WF is supplied in 25 kg polyethylene lined paper bags.
Handling & Storage
duragrout 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
duragrout 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
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.® has a wealth of technical and practical experience built up over years in the company’s pursuit of excellence in building and construction technology.