Penaflow Grout UW
High Performance Non Shrink Cementitious Grout for Under Water Application.
High Performance Non Shrink Cementitious Grout for Under Water Application.
Aftek Penaflow Grout UW is a high performance construction grout based on a blend of Portland cement, high quality graded aggregates and additives, which control expansion whilst the grout is in a plastic state.
Penaflow Grout UW can be used underwater or in tidal zone application.
Penaflow Grout UW will not wash out when submerged in water and is ideal for underwater concrete piling.
| Appearance | Grey powder (grey when mixed) |
| Fresh wet density Kg/m³ | Approx. 2190 kg/m³ (flowable/pourable) |
| Application Temp | Minimum 10º C Maximum 30º C |
| Expansion characteristics | Expansion 1-2% Plastic state |
| Time for Expansion | Start 15 min Finish 3 hrs (plastic state) |
| Bleed | 0% |
| Youngs Modulus | 25 GPa |
The substrate to be grouted must be clean, sound and free from dust, oil, grease, curing compounds or any foreign matter that will affect the grout adhesion bond. Bolt holes and anchor points must be clean and free of water.
(if applied in a tidal zone)
All prepared areas must be saturated with water for a minimum of 4 hours prior to grouting. This will reduce the porosity of the substrate.
Prior to grouting, ensure all excess water is removed and all holes must be free from water and no puddles of water are present.
If grouting under base plates, it is imperative that bleed holes or venting holes are provided (this will eliminate pressure build up in a confined area).
It is essential that the formwork to be constructed is leak proof and water tight. In order to achieve this it is recommended that foam rubber strips or a suitable sealant such as polyurethane or silicone be used underneath the formwork.
The formwork should be constructed, which will allow and ensure a grout head is maintained on the side above the level of the underside at the base plate. The formwork should allow for gravity flow of grout with a suitable grout head allowing for continuous flow between the base plate and the concrete substrate.
To ensure ease of formwork removal, the formwork should be coated with form oil or release oil prior to grouting (consult ITLS-Aftek Technical Department for additional information).
It is recommended that Penaflow Grout UW be kept in a cool environment and the use of cold water be used for mixing. It is recommended that in instances where the temperature is greater than 30º C, the grouting be conducted early in the day or late in the evening and sheltered from sunlight and direct heat.
Penaflow Grout UW is ready to use, simply requiring the addition of water. Penatech HS Grout must be mixed with a mechanical mixer with a high shear mixer or a suitable drum mixer that creates a forced action mixing.
For smaller quantity mixing, an electric drill with a spiral mixing paddle is suitable. The speed drill should be approx. 500-600 rpm.
do not mix by hand.
| Use | Water |
|---|---|
| Dry Pack/ Stiff Grout: | Add 2.7 - 2.9 litres per 20kg bag |
| Plastic/ Trowellable Grout: | Add 3.0 - 3.4 litres per 20kg bag |
| Flowable/ Pourable Grout: | Add 3.6 - 4.0 litres per 20kg bag |
Always add the grout powder to the pre-measured water.
Do not add additional water as grout wil seggregate and bleed affecting performance.
The selected water level should be accurately measured and added to a suitable mixing container.
Add the powder (grout) to the water and mix for 3-5 minutes until a homogeneous consistent mix is obtained.
Do not add additional water other than specified above. Discard any grout that has stiffened or is unworkable.
Penaflow Grout UW can be placed in three different ways:
1. Dry Pack/ Stiff Grout-
(2.7 - 2.9 litres water per bag)
Ensure sufficient water is present to obtain a stiff/ dry pack consistency. If the grout is too dry, insufficient hydration of the cements will cause low strength gain and inadequate curing. Using a tamping rod or a suitable temping tool, apply the grout in the required position tamping to ensure adequate compaction.
2. Gravity flow using header box
Mix the grout to a flowable consistency and pour grout from one side to avoid air entrapment. Ensure a grout head box is used and the grout head is maintained at all times. This will ensure continuous flow of grout without the possibility of air entrapment.
3. Large volume pumping
Mix the grout using a forced action mixer. A positive displacement pump is the recommended pump for large placement application. For large grout pours ensure the grout is pumped from the bottom upwards as this will minimize any air entrapment and ensure complete void filling. For base plates pump from one side ensuring an air bleeder hole is available in the formwork or base plate to ensure any build- up of pressure is released from the bleeder hole.
Do not vibrate or use mechanical vibrator to assist flow.
On completion of grout application, all exposed grout should be cured in accordance to ‘good practices’ in concrete curing. The exposed grout should be covered with plastic sheeting, wet hessian or wet liquid curing compounds such as the Curecon range at Aftek Curing Compounds. Consult your Aftek representative for advice on the most suitable product. Curing plays a vital role in ultimate grout performance and strength development.
