Concrete Construction Admixtures

Approx. Rs 85 / PackGet Latest Price

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Fosroc Cebex 200 a plasticising and hydrogen free expansion grout admixture is supplied as a powder admixture. Cebex 200 allows the use of a reduced water/ cement ratio with consequent increased strengths and durability. The expansive medium counteracts the natural settlement and plastic shrinkage of the grout and aids stability and cohesion.

Uses:

• It is an admixture for cement grouts where a reduced water / cement ratio and positive expansion are required. 
• Applications include bed  grouting, duct grouting, non-shrink infi lling and jointing.

Advantage:

• Hydrogen free expansion system compensates for plastic shrinkage and settlement in properly designed cementitious grout.
• Reduced water / cement ratio in the grout mix ensures low permeability and long term durability in service.
• Gives high grout fluidity with low water/ cement ratio, thus making placement  or  injection of the grout easy.
• No metallic iron content to corrode and cause staining or deterioration due to rust  expansion in the grout.
• Composition allows high early strength development in grouts, without the use of chlorides.

Approx. Rs 1,500 / DrumGet Latest Price

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Uses:

• To minimise permeability and increase the waterproofing properties of concrete and cement sand mortars for critical applications like roof slabs and screeds, basements, external plastering, bathroom floors, water tanks, sumps, drains etc.

Advantages:

• Liquid admixture: Instant and complete dispersion throughout the mix. Uniform waterproofing throughout concrete matrix.
• High efficiency: Dramatic reduction in permeability of concrete/ mortar.
• Improved workability: Improves compaction of concrete and mortar, even where harsh sands or aggregates are used.
• Improved concrete quality : Minimises porosity and honey combing. Produces dense homogenous concrete.

Standards Compliance:

• Conplast WL conforms to IS:2645-2003.

Description:

• It is based on lignosulphonates which mixes readily with water and therefore disperses evenly. 
• It waterproofs by improving the quality of the concrete or mortar. 
• It reduces the water demand for required workability and minimises segregation and bleeding. 
• Thus it is more efficient compared to traditional powder waterproofers as its use results in two fold improvement of concrete or mortar.

Properties:

• Chloride content : As per IS:2645-2003
• Compatibility : Can be used with all types of cements,including pozzolanic but not High Alumina Cement.
• Permeability to water : Less than 15% as compared to 50% max. allowable under IS:2645compared to control sample.
• Setting Time: No significant effect on setting time of concrete or mortar.
• Compressive Strength : Maintains compressive strength equal to control concrete or mortar and can even improve on strength property if full advantage of water reduction potential is utilised.
• Workability: Improves workability at reduced water cement ratio

Application instructions:

• Mortar: Conplast WL is ideal for use with all sand/cement mortars where it is required to reduce permeability to a minimum.
• Concrete: Conplast WL is recommended for all general mass concrete work where, due to harsh aggregates, difficulty of compaction or mix control, the risk of porosity and permeability must be minimised. Eg. Basements, bund walls, tanks, balcony, floor and roof slabs.
• N.B.: The minimum dosage is 125ml and the maximum is 200ml per 50kgs of cement. If maximum dosage is used a minimum of 15% water should be reduced to ensure no loss in strength. Site trials shall be carried out to arrive at the optimum dosage.
• The required quantity of Conplast WL is measured and stir into the first or second bucket of water
• Conplast WL water mixture shall be added to the concrete or mortar and mixed thoroughly.
• Mixing shall be continued and further water shall be added until the required workability is obtained.

Additional information:

• The Fosroc range of associated products includes high strength cementitious, epoxy grout, polyester resin based mortar for rapid presetting of steel shims to level or for direct bedding of small base plates; Resin Anchoring systems for same day anchoring of bolts in drilled holes in concrete or rock. Also available a range of products for use in construction; viz., admixtures, curing compounds, release agents, flooring systems and repair mortars.

Approx. Rs 1,600 / DrumGet Latest Price

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Fosroc Conplast P211 Plasticizing Admixture is a chloride free water        reducing admixture based on selected sugar-reduced  ligno sulphonates. It is supplied as a brown  solution which instantly disperses in water. It disperses the fine particles in the concrete mix, enabling the water content of the concrete to perform more effectively and improving the consistency of the concrete. This produces higher levels of workability for the same water content, allowing benefits such as water reduction and increased  strengths to be taken.

Uses:

• To improve the effectiveness of the water content of a concrete mix.
• At higher dosages to provide a cost effective means of reducing concrete permeability and thereby reducing water penetration.

Advantages:

• Allows specified strength grades to be met at reduced cement content or increased workability.
• Water reduction significantly improves compressive strengths at all ages and enhances durability through the production of low permeability concrete.
• Minimises the risk of segregation and bleeding and assists in the production of a dense, close textured surface, improving durability.
• Chloride free, safe for use in prestressed and reinforced concrete

Approx. Rs 2,700 / DrumGet Latest Price

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Conplast NC is guaranteed completely       free of all forms of chloride and is supplied as a light straw coloured liquid. The main active ingredient is an inorganic formate.


Uses:

• To accelerate the setting and early strength gain of Port land cement  concrete and mortar mixes without the introduction of chloride.
•  Acts as a plasticiser, so gives significant increases in both ultimate and early strengths.    
• Typical applications include precast concrete, concrete placed in coldweather, concrete for repairs, mortars for brickwork.

Advantage:

• Chloride free, safe in pre stressed and reinforced concrete
• Produces exceptionally high early strengths
• Plasticising action gives increased workability and/ or increased strengths
• Early setting improves frost resistance
• Suitable for brick laying mortar mixes
• Particularly effective in concrete at low temperatures

Approx. Rs 900 / DrumGet Latest Price

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Cebex 112 is supplied as an off-white to pale yellow liquid which mixes readily with water in any proportions. It is based on internationally recognised chemicals and is  free from calcium chloride and similar salts.

Uses:
To improve workability and trowelling properties of sand/ cement mortar mixes during application. To increase quality of  masonry  and  plastering.

Advantage:

• Improved moisture retention and bond strength:  Slows down drying out of mortar which remains workable longer. Ensures better bond to all surfaces, including ceiling.
• Makes mortar crack resistant:    Minimises drying shrinkage cracks and  increases frost resistance in cold climates.
• High workability: Even with harsh sands, makes creamy easy-to-apply  mortar.
• Cost saving: Increase yield of the same quantity of sand/ cement. Extra coverage normally exceeds material costs.
• Better & safer masonry: Mortar fills joints easily and efficiently and ensures stronger construction.
• Improved appearance: Mortar cuts cleanly from faces of brick, block or stone work.
• Increased productivity: Speeds up  work by easy application of mortar.

Approx. Rs 55 / KgGet Latest Price

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Conplast SP500 Superplasticizer Admixture is  based  on  Sulphonated  Napthalene Polymers  and    is  supplied        as  a  brown  liquid  instantly dispersible  in  water. Conplast SP500 has been  specially formulated to give highwater  reductions  upto  25%  without  loss  of  workability  or  toproduce high quality concrete of reduced permeability.

Usage:

• To produce pumpable concrete.
• To produce high strength, high grade concrete by substantial reduction in water resulting in low permeability and high early strength.
• To produce high workability concrete requiring little or no vibration during placing.

Advantage:

• Improved  workability  -  Easier,  quicker  placing  and compaction.
• Increased strength - Provides high early strength  for  precast  concrete  if  water  reduction  is  taken advantage of.
• Improved quality - Denser, close textured concrete with reduced  porosity  and  hence  more  durable.
• Higher  cohesion  -  Risk  of  segregation  and  bleeding minimised;  thus  aids  pumping  of  concrete.
• Chloride  free  -  Safe  in  prestressed  concrete  and  with sulphate  resisting  cements  and  marine  aggregates.

Approx. Rs 65Get Latest Price

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Plasticised expanding grout        admixture

Uses:

Cebex 100 is an admixture for cementitious grouts where a reduced water/cement ratio and positive expansions are required. Applications include bed grouting, duct grouting, non-shrink infilling and jointing.

Advantage:

• Gaseous  expansion  system  compensates  for  plasticshrinkage  and  settlement  in  properly  designedcementitious  grout.
• Reduced water/cement ratio mixes in the grout mix ensure slow permeability and long term durability in service.
• Gives grout high fluidity with low water/cement ratio, thusmaking placement or injection of the grout easy.
• No metallic iron content to corrode and cause staining ordeterioration due to rust expansion in the grout.
• Composition  allows  high  early  strength  development  ingrouts, without  the  use  of  chlorides.

Description

Cebex 100, a plasticised expanding grout admixture is supplied as a powder. The material is a combination of a plasticising agent and a gas producing expansion medium. The plastisicing agent allows the use of a reduced water/ cement ratio with consequent increased strengths and durability. The expansive medium counteracts the natural settlement and plastic shrinkage of the grout and aids stability and cohesion.

Specification clauses

Performance specification

All grouting (specify details and areas of application) must be carried out with a cement based grout incorporating a plasticised, expanding powder admixture. The grout admixture must be iron-free and chloride-free and shall be added to the cement grout in the proportion of 225g per 50kg of cement. The grout admixture shall provide an expansion of up to 4% in the plastic grout, by means of a gaseous system. The grout admixture must be stored, handled and mixed strictly in accordance with the manufacturer's instructions.

Application instructions

Mixing

For best results a mechanically powered grout mixer must be used. For quantities upto 50kg, a slow speed drill fitted with a hig shear paddle is suitable. Large quantities will require a high volume drum mixer. It is essential that machine mixing capacity and labour availability is adequate to enable the grouting operation to be carried out continuously. This may require the use of a holding tank with provision for gentle agitation to maintain fluidity. The selected water content should be accurately measured into the mixer. The cement (and sand if required) shall be slowly added to Cebex 100. Mixing shall be continued for 5 minutes, making sure that a smooth even consistency is obtained. 

Application

It shall be ensured that areas to be grouted are clean, sound, and then pre-wetted. The unrestrained surface area of the grout must be kept to a minimum. The grout shall be placed within 20 minutes of mixing to gain the full benefit of the expansion process. Usual placing or pumping procedures shall be adopted ensuring a continuous operation. 

Curing 
On completion of the grouting operation, any exposed areas which are not to be cut back should be thoroughly cured by means of water application, concure*  curing membrane or wet hessian.

Limitations

 

Cebex 100 is incompatible with High Alumina Cement.

Approx. Rs 34 / KgGet Latest Price

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Sprayset HBL (M) is a chloride free      liquid based on a blend of inorganic powders, which is added to a sprayed concrete mix to impart properties of high build and low rebound.

Uses :

• It is added to a sprayed concrete mix to impart properties of high build and low rebound to enable a high build of sprayed concrete, shotcrete and gunite without slump and provide set acceleration and reduce rebound.

Advantage:

• High build enables faster coverage with minimised slump.
• Can be applied upto 300mm in one application to vertical surfaces and upto 200mm overhead dependant on weight/ volume of aggregate
• Non caustic leads to safer handling / operating conditions
• Low rebound - controlled set allows new material to be embedded in applied mortar
• Chloride free liquid
• 28 days strength not adversely affected