Products_Admixtures & Surface Treatments

The term Concrete Admixture can be defined as “a material other than water, aggregates, hydraulic cement, and fiber reinforcement, used as an ingredient of a cementitious mixture to modify its freshly mixed, setting, or hardened properties and that is added to the batch before or during its mixing”. It can also be stated that “chemical admixtures are used to enhance the properties of concrete and mortar in the plastic and hardened state. These properties may be modified to increase compressive and flexural strength at all ages, decrease permeability and improve durability, inhibit corrosion, reduce shrinkage, accelerate or retard initial set, increase slump and workability, improve pumpability and finish-ability, increase cement efficiency, and improve the economy of the mixture. An admixture or combination of admixtures may be the only feasible means of achieving the desired results. In certain instances, the desired objectives may be best achieved by mixture changes in addition to proper admixture usage”.

Chemical admixtures are materials that are added to the constituents of a concrete mixture, in most cases, specified as a volume in relation to the mass of the cement or total cementitious materials. The admixtures interact with the hydrating cementitious system by physical and chemical actions, modifying one or more of the properties of concrete n the fresh and/or hardened states. Concrete is composed principally of aggregates, hydraulic cement, and water, and may contain other cementitious materials and chemical admixtures. It will contain some amount of entrapped air and may also contain purposely entrained air obtained by use of a chemical admixture or air-entraining cement. Chemical admixtures are also frequently used to accelerate, retard, improve workability, reduce mixing water requirements, increase strength, improve durability, or alter other properties of the concrete. There are many kinds of chemical admixtures that can function in a variety of ways to modify the chemical and physical properties of concrete. This bulletin provides information on the types of chemical admixtures and how they affect the properties of concrete, mortar, and grout.

Some of the most important reasons for the use of admixtures are outlined by the following functions that they perform:

  • Increase workability without increasing water content or decrease the water content at the same workability;
  • Retard or accelerate time of initial setting;
  • Reduce or prevent shrinkage or create slight expansion;
  • Modify the rate or capacity for bleeding;
  • Reduce segregation;
  • Improve pumpability;
  • Reduce rate of slump loss;
  • Retard or reduce heat evolution during early hardening;
  • Accelerate the rate of strength development at early ages;
  • Increase strength (compressive, tensile, or flexural);
  • Increase durability or resistance to severe conditions of exposure, including application of deicing salts and other chemicals;
  • Decrease permeability of concrete;
  • Control expansion caused by the reaction of alkalies with potentially reactive aggregate constituents;
  • Increase bond of concrete to steel reinforcement;
  • Increase bond between existing and new concrete;
  • Improve impact and abrasion resistance;
  • Inhibit corrosion of embedded metal; and
  • Produce colored concrete or mortar.

 Our Range of Concrete Admixture are as follows
MYK Savemix SP 111M - Normal range water reducing agent, can compensate water content up to 10 – 15 % in the mix for the given workability. The product is a blend of Ligno Sulphonates and Naptha Formaldehydes.

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MYK Savemix SP 200 - Naptha formaldehyde based high range water reducing agent, can compensate water content up to 20 – 25 % in the mix for the given workability.

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MYK Remicrete PC20 - Polycarboxylic Ether based admixture for High range water reducing and for the production of Self compacting concrete in conjunction with VMA. Can be used for High grade concretes above M50.

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MYK RemiAir AE - Pure Air Entraining agent for the production of light weight concrete and also can be used for the mass concreting works to counter the heat of hydration and to control the thermal cracks, and also has a special application for Freeze – Thaw Resistance.

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MYK Proof WP10 - Integral Waterproofing admixtures for concrete and mortars. It basically reduces the porosity and hence increases the waterproofing properties of the concrete. The product conforms to IS 2645: 2003.

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