Penatech HES
High Early Strength Class C Cementitious Grout.
Pack
20 kg Bag
High Early Strength Class C Cementitious Grout.
Penatech HES Grout is a high early strength gain, flowable, shrinkage compensated, Class C grout for use where rapid strength gain is required.
Penatech HES Grout complies with US Corps of Engineers specification CRDC 621-82A and ASTM C1107-91 for Class C Grout
Penatech HES Grout comprises a blend of Portland cements, graded fillers and chemical additives which impart controlled expansion in the plastic and hardened states whilst minimising water demand and maximizing early compressive strength gain.
Penatech HES Grout is supplied as a ready to use powder, requiring only the addition of clean water to produce a flowable consistency non-shrink grout.
High early strength, even at low temperatures. Dual stage expansion compensates for shrinkage in both the plastic and hardened states
High ultimate strength (28 days) Exceptional flow characteristics Rapid strength gain and set times Variable consistency obtainable Equipment and machinery can be reinstated after 24 hours
Non metallic iron eliminates staining Good impact and thermal resistance Complies with US Corps of Engineers specification CRD-C—621-82A and ASTM C1107-91 for expansion
Prepackaged material requires only the addition of clean water on site Grouting from 10mm to 120 mm in a single application
| Appearance | Light grey powder (grey when mixed) | |
| Application Temp | Min: 5°C Max 30°C |
|
| Expansion Characteristics | Expands 1 – 2 % in plastic state | |
| Time for Expansion | Start: 5 mins Finish: 25 mins |
|
| Bleed | 0% | |
| Young’s Modulus | 28 GPa | |
The substrate surface must be free from oil, grease or any loosely adherent material. If the concrete surface is defective or has laitance, it must be cut back to a sound base. Scabbling or water blasting can be used to remove laitance and provide a mechanical key.
Bolt holes or fixing pockets must be blown clean of any dirt or debris. Any cracked or weakened concrete should be removed to provide a solid foundation.
Several hours prior to grouting, the area of cleaned foundation should be flooded with fresh water. Immediately before grouting takes place, any free water should be removed with particular care being taken to blow out all bolt holes and pockets.
It is essential that this is clean and free from grease, oil or scale. Air relief holes should be provided to allow venting of any isolated high spots.
If these are to be removed after the grout has hardened, they should be treated with a suitable release agent.
The formwork should be constructed to be leak proof. This can be achieved by using foam rubber strip or mastic sealant beneath the constructed formwork and between joints.
In some cases it is practical to use sacrificial semidry sand and cement formwork. The formwork should contain outlets for presoaking.
This must be kept to a minimum. Generally the gap width between the formwork and the plate edge should not exceed 150mm on the pouring side and 50mm on the opposite side. It is advisable to have no gap at the flank sides.
For best results a mechanically powered grout mixer should be used when quantities up to 40kg are used, a slow speed drill fitted with a high shear mixer is suitable. Larger quantities will require a high shear vane mixer. Do not use a colloidal impeller mixer.
To enable the grouting operation to be carried out continuously, it is essential that sufficient mixing capacity and labour are available. The use of a grout holding tank with provision to gently agitate the grout may be required.
The quantity of clean water required to be added to a 20kg bag to achieve the desired consistency is given below.
| Consistency: | Flow | Fluid |
|---|---|---|
| Water required: | 2.5 – 2.8 litres | 3.2 – 3.5 litres |
The water content should be accurately measured into the mixer.
The water content should be accurately measured into the mixer.
At 20°C, place the grout within 10 minutes of mixing to gain the full benefit of the expansion process.
Penatech HES Grout can be placed in thickness up to 120mm in a single pour when used as an under-plate grout. For thicker sections it is necessary to fill out Penatech HES Grout with well graded silt free aggregate to minimise heat buildup.
Typically Epilox Fillers F4 is suitable for this, added at the rate of 10kg per 20kg bag of Penatech HES Grout.
Do not add excess aggregate as this will affect the water requirement and ultimate strength gain of the grout.
NOTE: Adding aggregate may create a heat sink effect which will retard the set of the grout. This will slow strength development slightly in the first few hours after placement of the filled grout.
Any bolt pockets must be grouted prior to grouting between the substrate and the base plate.
Continuous grout flow is essential. Sufficient grout must be prepared before starting. The time taken to pour a batch of grout must be regulated to the time to prepare the next one.
Pouring should be from one side of the void to eliminate any air or presoaking water from being trapped under the baseplate. It is advisable to pour the grout across the shortest distance of travel. The grout head must be maintained at all times so that a continuous grout front is achieved.
Where large volumes have to be placed, Penatech HES Grout may be pumped. A heavy duty diaphragm pump is recommended for this purpose. Screw feed and piston pumps may also be suitable.
On completion of the grouting operation, exposed areas should be thoroughly cured. This should be done by the use of an Aftek liquid curing membrane, continuous application of water and/or wet hessian.
Penatech HES Grout is supplied in 20 kg polylined bags.
| Consistency: | Flow | Fluid |
| Yield per bag: | 10.3 litres (approx.) | 11 litres (approx.) |
| Fresh Wet Density | 2220 kg/m 3 | 2200 kg/m 3 |
| No. Bags to cast one cubic metre: | 97 | 91 |
NOTE: These figures are intended to be used as a guide only. Variations in water content and wastage on site may cause yields to fluctuate.
