Conbextra GP2

Description

With our in-depth knowledge of this domain, we are actively engaged in offering an excellent quality assortment of Conbextra GP2.

Usage:
Conbextra GP2(T) is used for precision grouting where it is essential to withstand static and dynamic loads. Typical applications would be the grouting of base plates of turbines, compressors, boiler feed pumps etc., It can also be used for anchoring a wide range of fixings. These include masts, anchor bolts and fence posts.

Advantages:
Gaseous expansion system compensates for shrinkageand settlement in the plastic state.
No metallic iron content to cause staining
Pre-packed material overcomes onsite batching variations
Develops high early strength without the use of chlorides
High ultimate strength ensure the durability of the hardened grout
Free flow ensures high level of contact with load bearing area.

Product Description:
Conbextra GP2(T) is supplied as a ready to use dry powder.
The addition of a controlled amount of clean water produces a free flowing, non-shrink grout for gap thicknesses up to 100mm.Conbextra GP2(T) is a blend of Portland cement, graded fillers and chemical additives which impart controlled expansion in the plastic state whilst minimising water demand. The low water demand ensures high early strength. The graded fillers are designed to assist uniform mixing and produce a consistent grout.

Technical support:
An experienced technical advisory team is available to give technical service on request.

Performance specification
All grouting shown on the drawing must be carried out with a pre packed cement based product which is chloride free.
It shall be mixed with clean water to the required consistency.
The grout must not bleed or segregate.A positive volumetric expansion shall occur while the grout is plastic by means of gaseous system.

Unrestrained surface area
This must be kept to a minimum. Generally the gap width between the perimeter formwork and the plate edge should not exceed 150mm on the pouring side and 50mm on theopposite side. It is advisable, where practical, to have no gap at the flank sides.

Mixing:
For best results a mechanically powered grout mixer should be used. When quantities up to 50kg are used, a heavy duty slow speed drill (400-500 rpm) fitted with a paddle is suitable..
Larger quantities will require a heavy duty 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.
Consistency of grout mix The quantity of clean water required to be added to a 25kg bag to achieve the desired consistency is given below
Pourable : 4.125 litres
Flowable : 4.500 litres
The selected water content should be accurately measured into the mixer. The total content of the Conbextra GP2(T) bag should be slowly added and continuous mixing should take place for 5 minutes. This will ensure that the grout has a smooth even consistency.

Placing:
At 30 C place the grout within 20 minutes of mixing to gain full benefit of the expansion process.
Conbextra GP2(T) can be placed in thicknesses up to 100mm in a single pour when used as an underplate grout.
For thicker sections it is necessary to fill out Conbextra GP2(T) with well graded silt free aggregate to minimise heat build up. Typically a 10mm aggregate is suitable. 50 – 100% aggregate weight of Conbextra GP2(T) can be added.