Elucidating the term “Admixtures”
Materials other than water, aggregates, cementitious materials, and fibers reinforcement used as a component of a cementitious mixture to remold its freshly mixed, settled, and tough properties that are included in the batch before or during its mixing is called ADMIXTURES. Admixtures are materials that are responsible for modification of the properties of concrete or mortar to make them best-suited for the work in hand...
- Accelerators
- Retarders
- Water reducing agents
- Super Plasticisers
- Water purifying agents
- Gas Formation Agents
- Grouting Admixtures
- Corrosion inhibitors
- Bonding admixtures
- Coloring Admixtures
- Pumping Aids
- Pozzolanic or mineral admixtures
- Fungicidal, Germicidal, Insecticidal admixtures
To ameliorate the characteristics of the concrete requires, admixtures are further divided into two groups:
- Chemical Admixtures
- Mineral Admixtures
What are Chemical Admixtures?
Chemical admixtures are the components used in concrete other than portland cement, water, and aggregate that are added to the mixture either before or during the mixing of the concrete...
- Pozzolanic material admixtures
- Fly Ash admixtures
- Silica Fume Admixtures
- Cement containing material or slag admixtures
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Role of Admixtures to revamp fresh concrete characteristics:
Following are the roles of admixtures to modify the fresh concrete characteristics of cement in the construction of a structure or building:
- It is used to increase the overall workability without the need of increasing water content or decrease water content at the same workability.
- Used to retard or accelerate initial and final settings times simultaneously.
- Used in prevention or reduction of settlement.
- Creating of slight expansion in concrete and mortar.
- Revamping the rate and capacity for bleeding.
- Reducing the segregation of concrete, mortar, and grouts.
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What are Mineral Admixtures?
Mineral admixtures are materials with inorganic materials having the properties of pozzolanic or latent hydraulics...
- Pozzolanic material admixtures
- Fly Ash admixtures
- Silica Fume Admixtures
- Cement containing material or slag admixtures
Various types of Chemical Admixtures
As mentioned above, chemical admixtures are used to improve the quality of concrete used in construction during mixing, transporting, placement and curing...
- Air Entrainers
- Water Reducers
- Set Retarders
- Set Accelerators
- Superplasticizers
- Specialty Admixtures like corrosion inhibitors, shrinkage control, coloring, alkali-silica reactivity inhibitors.
- Water-Reducing Admixtures
- Retarding Admixtures
- Accelerating Admixtures
- Water-reducing and Retarding Admixtures
- Water-reducing and Accelerating Admixtures
- Water-reducing, high range admixtures
- Water-reducing, high range, and retarding admixtures
Various types of Mineral Admixtures
Mineral Admixtures are basically obtained from industries. These are mostly the residues of some industrial materials that are used in making a hunk of concrete more stronger and cheaper...
- Pozzolanic material admixtures
- Fly Ash admixtures
- Silica Fume Admixtures
- Cement containing material or slag admixtures
Role of Admixtures to revamp hardened concrete characteristics:
Following are the roles of admixtures to modify the hardened concrete characteristics of cement used in the construction of a building or a structure:
- During the early hardening, retarding or reducing the heat generation.
- Accelerating the rate of strength development.
- Proliferate the strength of concrete or mortar, like compressive, tensile, or flexural.
- Proliferating the durability or resistance serving the conditions of exposure including the application of deicing salts.
- Decreasing the capillary flow of water.
- Decreasing the permeability to liquids.
- Swaying the expansion caused by the regression of alkalis with specific aggregate ingredients.
- Producing of cellular concrete.
- Proliferating the bond of concrete to steel reinforcement.
