Pratham Associates

Description :
Dr. Fixit Pidicrete AM is composed of plastisizers, expansion additives, polymers & defoamer. It is used forproducing cementitious injection grouts for pressure / gravity injection into concrete structures, for producingcementitious grouts, which are suitable for bed grouting, duct grouting, filling etc. because it provides plastisizing action which improves flow, expansion additive provides shrinkage compensation after curing & highcompressive strength.
Areas of Application :

• For injection grouting in –
• RCC slabs, Sunken slabs,
• RCC walls of water tanks, swimming pools
• Basements for waterproofing purpose
• Duct grouting
• Rock and soil anchoring
• Pre-placed aggregates and tunnel lining
• Crack filling in structural cracks
• For structural strengthening in repairs

Features & Benefits :

• Shrinkage - Produce shrinkage compensating cement slurry.
• Permeability - Reduced water-cement ratio of cementitious grouts, the mix has reduced permeability to water.
• Flowability - Provides good flowable grout mix so that mix could be easily placed or injected by gravity or pressurized injection pump.
• Durability – Increases durability of repaired structures.
• Corrosion - Chloride and iron free, hence no chance of corrosion.
• Setting Time - Does not affect the setting time of cement.
• Strength – Does not affect the strength of cement, infact increases.

Method of Application :
Cementitious Injection Grouting
Surface Preperation

• The areas that requires injection grouting should be prepared thoroughly and locations of grout must
• be finalised.
• Drill hole of required size into the structure and fix grouting nozzle. Allow nozzle to set for 24 hours

Mixing :

• Take the appropriate amount of water and then add cement and mix for 3-5 minutes with a drill mixer (for small jobs) or a paddle type mortar mixer (for large jobs) at 150 – 200 rpm.
• Add required quantityt of Dr. Fixit Pidicrete AM and mix for another 3-5 minutes until a consistent mix is achieved.

Application :

• Carry out injection grouting either by gravity or with grouting pump using the mixed material.

Mixing :

• Mix 1 bag [50 Kg] OPC – 53 grade cement with 100 Kg of clean & dry fine sand [ 0 – 2mm] in a pan / concrete mixer.
• Add Dr Fixit PIDCRTE AM, 225gms & mix for 2 minutes.
• Start addition of water, 20 – 25 Ltrs [as per w/p ratio – 0.2 to 0.25] , under mixing & mix for 3-5 minutes to get homogeneous flowing mortar.

Precautions & Limitations :

• Number of holes and diameter to be decided at site
• Grouting pressure should be adjusted at site depending upon the nature of problem and thickness of structural member
• Properly seal the nozzles, with suitable adhesive / sealant / polymer modified mortar.
• Do not dilute the injection grout with more water, it will reduce the strength.

Health & Safety Precautions :

• Use rubber hand gloves & safety goggles, while using Dr Fixit PIDICRETE AM
• In case of contact with skin, wash with plenty of water.
• Keep out of reach of children’s

Conbextra GP2 isusedforprecision 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. 
Conbextra GP2 is supplied as a ready to use dry powder. Theaddition of a controlled amount of clean water produces a freeflowing, non-shrink grout for gap thicknesses up to 100mm.
Conbextra GP2 is a blend of Portland cement, graded fillers and chemical additives which impart controlled expansion in the plasticstate whilst minimising water demand. The low water demandensures high early strength. The graded fillers are designed toassist uniform mixing and produce a consistent grout.
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

Preparation :
Foundation surfaceThe 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 presoaking

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 :

• 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. 
• 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.
• At 30 Degree C 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.

Nitotile GP is a high quality thin bed adhesive for the permanent fixing of ceramic tiles. It can also be used for fixing of insulating and acoustic boards based on expanded polystyrene etc.