Concrete admixtures are chemical products produced from raw materials such as liguinin, chlorides, aluminates, melamine silicates, among others. It is used in the manufacture of concrete and mortar in quantities below 5% by volume by weight of cement, to modify the physical-chemical properties, in order to improve and facilitate the preparation, application and release, eliminate undesirable such as segregation, cracking, blistering, etc. And to improve the characteristics of impact resistance, waterproofing, durability and the mechanical appearance of cement or concrete.
Additives are widely used in the preparation of concrete and mortar, it can even be considered as a fourth component of concrete, in addition to water, cement and aggregate. The concrete additives are chemicals added to the cement to the mortar or concrete, to modify one or other properties of cement mixtures. Generally they vary between 0.05% and 5% by mass cementing materials.
Chemical admixtures for concrete from chemical company Malaysia are now an integral part of cement mixtures, due to the various advantages they provide to their properties in fresh and hardened states. The use of concrete admixtures enables the production of cementitious materials for a wide variety of mixing applications with dry consistencies such as self-compacting concrete.
Concrete admixtures can be categorized according to;
The role they play, such as:
- Air intake
- Water reducers
- Handle retardants
- Rheology modifiers
- Corrosion inhibitors
- Shrinkage reducers
- Permeability reducers
- Inhibitors of alkali-silica reaction
With pigments and various other functions, such as:
- Adhesion agents
- Degassing agents
- Cohesion agents for pumping
- Foaming agents, etc.
There are 6 methods of admixtures for concrete such as:
- Plasticizing liquid
- Mortar waterproofing
- Cement color
- Dust proof agent and surface hardener
- Frost proof agent and fast hardener
- Rendering retardant and waterproofing agent
How to use concrete admixtures
Take precautions before starting. Most cement additives are not flammable or toxic under normal conditions of use, but certain measures must be followed when using this product, similar to the use of cement, which is an alkaline product.
Avoid skin contact as much as you can. If contact occurs, or if liquid accidentally splashes into eyes Rinse with water. You should do this immediately after the use of cement and additives, before eating or to allow hand-mouth contact.
If liquid is swallowed, get medical help immediately.
Store properly. All additives should be stored at room temperature between 5 ° – 30 ° C.
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