FOSROC CONBEXTRA GP2 – 25 KG

Name: FOSROC CONBEXTRA GP2 - 25 KG
SKU: 16224
Price: 560.00 INR
Availability: InStock

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Vendor: Civilismart

Original price was: ₹600.00.Current price is: ₹560.00.

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Brand: Fosroc
Product Name: Conbextra GP2
Weight: 25 KG
Usage: High-performance, non-shrink, cementitious grout for grouting of gaps and base plate grouting
Note: Provides excellent flow properties, high early strength, and long-term durability.

Categories: Building Material Chemicals Tag: FOSROC

Product Description

Uses:-

Conbextra GP2 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 shrinkage and 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

Specification Clauses:-

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.

Application instructions:-

Preparation:-

Foundation surface:-

The substrate surface must be free from oil, grease or any loosely adherent material. If the concrete surface is defective or has laitence, it must be cut back to a sound base. Bolt holes and fixing pockets must be blown clean of any dirt or debris.

Pre-soaking:-

Several hours prior to placing, the concrete substrates should be saturated 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.

Base plate:-

It is essential that this is clean and free from oil, grease or scale. Air pressure relief holes should be provided to allow venting of any isolated high spots.

Levelling shims:-

If these are to be removed after the grout has hardened, they should be treated with a thin layer of grease.

Formwork:-

The formwork should be constructed to be leakproof. 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 a sacrificial semi-dry sand and cement formwork. The formwork should include outlets for pre-soaking.

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 the opposite side. It is advisable, where practical, to have no gap at the flank sides.

Mixing and placing:-

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 : 4.5 litres

The selected water content should be accurately measured into the mixer. The total content of the Conbextra GP2 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 300C place the grout within 20 minutes of mixing to gain full benefit of the expansion process. Conbextra GP2 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 fi ll out Conbextra GP2 with well graded silt free aggregate to minimise heat build up. Typically a 10mm aggregate is suitable. 50 – 100% aggregate by weight of Conbextra GP2 can be added.

Any bolt pockets must be grouted prior to grouting between the substrate and the base plate. Continuous grout fl ow is essential. Sufficient grout must be prepared before starting. The time taken to pour a batch must be regulated to the time to prepare the next one.

Curing:-

On completion of the grouting operation, exposed areas should be thoroughly cured. This should be done by the use of Concure WB curing membrane, continuous application of water and/or wet hessian.

Packaging:-

Conbextra GP2 is supplied in 25 kg moisture resistant bags.

Shelf life:-

Conbextra GP2 has a shelf life of 6 months if kept in a dry store in sealed bags. If stored in high temperature and high humidity locations, the shelf life may be reduced.