DESCRIPTION

 

In the construction industry, cement paste, mortar, and concrete are the most commonly used materials, due to their easiness to fabricate, low expenditure, good performance, and versatility. Globally, around 20bln tons of concrete and more than a billion tons of cement are used annually in infrastructure and buildings. However, the drawbacks of these cement-based materials (CBMS), such as low tensile strength, susceptibility to cracking, and the likelihood of sudden failure (due to their brittle nature), are caused due to a number of reasons such as degradation in the technical properties of CBMS. The addition of admixtures, consisting of single or a combination of specific chemicals, in powder or solution form, in cement paste, mortar, and concrete, has demonstrated a substantial reduction in the above types of failures due to an increase in mechanical strength accompanied by a reduction in cost, curing time and requirement of water and cement. The general characteristics of the chemicals used in admixture include: better dispersion of cement particles, corrosion inhibition, enhancing the plasticity of cement, control over curing through intervention in the hydration process of the cement, etc. The main cement hydration product, calcium–silicate–hydrates (C–S–H) is the main phase that combines aggregates together, forming the strength and other macroscopic engineering properties of CBMS. Recently, the use of nanomaterials owing to their high surface to volume and the presence of unsaturated bonds at the surface are considered to improve the mechanical properties and durability performances of CBMS mainly through two approaches:

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(1) acting as a superb filler and

(2) involving cement hydration.

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In view of the great potential of nanomaterial in the construction industry, our company has designed and developed a water-reducing admixture AdMix consisting of nano-silica produced/suspended in an alkaline non-toxic aqueous solution of a polymer known for the following improvements in properties of concrete with following associated advantages.

 

ADVANTAGES

 

• Improved dispersion properties

• High water reduction

• High Early strength

• Improved durability

• Improved cohesion properties

• Improved rheology

• Improved flowability

• Reduced drying shrinkage

• Improved workability retention

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USES

 

QNano AdMix is highly suitable for concrete in the floor, slabs, foundations, slender components with dense reinforcement, walls, columns, pavements, and other structural and non-structural elements. Especially recommended for the following types of  concretes:

 

• High-performance concrete

• High Early strength concrete

• Ready-mixed concrete

• Self-compacting concrete

• Precast concrete

• Prestressed concrete

• Pumped concrete

 

PRODUCT INFORMATION
 

• Chemical base: Nano silica particles suspended in an aqueous solution of polyethylene glycols

• Packaging: 5kg to 100kg

• Shelf life: 12 months from the date of production if stored properly in undamaged, un-opened, original sealed packaging.

• Density g/cc: ~1

• pH: >8

• Viscosity (ford cup): 110-112

 

APPROVALS / STANDARDS: As per IS 9103

 

APPLICATION INSTRUCTIONS

 

DISPENSING: AdMix can be added into the mixing water or directly into the concrete mixer after 50 – 70% of the mixing water has been added. The addition of this AdMix to dry aggregate or cement is not recommended. To achieve optimum performance a minimum wet mixing time, which is depending on the mixing conditions and the mixer performance, of 60 seconds is recommended.

 

LIMITATIONS: Excessive water addition or overdosing may cause bleeding or segregation.

 

BASIS OF PRODUCT DATA

All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control.

 

DISCLAIMER

The information, and, in particular, the recommendations relating to the application and end-use of this product, are given in good faith based on our current knowledge and experience of the products when properly stored, handled, and applied under normal conditions in accordance with our recommendations. In practice, the differences in materials, substrates, and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended application and purpose.