07-01-2022, 11:32 AM
CONCRETE ADMIXTURES - PLASTICIZERS
There are essentially four ingredients in concrete, i.e. the coarse aggregates, fine aggregates, cement and water. However, in order to improve certain properties of concrete both in the plastic and hardened state, it is necessary to add the fifth ingredient in the concrete mix. This fifth ingredient can be a mineral or chemical admixture.
If the concrete mix is properly designed, it does do not need any admixture. However, there may be a need to produce concrete with a particular result and using admixture could be the most convenient way. It is very important to note that any type of admixture should be used only when there is a valid reason for using it.
There are several types of admixtures available but the most popular and most often used is the plasticizer. The plasticizer is a chemical admixture and this publication covers in detail its classification, interaction, useful effects on concrete properties and precautions to be exercised in its usage. Plasticizers have been extensively used in concrete mixes for the past three decades the world over. However, in India this usage has considerably increased in the last five years. Plasticizers or other type of admixtures are not a substitute or badly designed concrete mixes or bad construction practices. They are aids to modify good mixes and good construction practices to achieve certain specific requirements which can be conveniently achieved. There are two types of plasticizers. The ordinary plasticizer is one type and the other is a superior plasticizer or superplasticizer.
For more details view or download
There are essentially four ingredients in concrete, i.e. the coarse aggregates, fine aggregates, cement and water. However, in order to improve certain properties of concrete both in the plastic and hardened state, it is necessary to add the fifth ingredient in the concrete mix. This fifth ingredient can be a mineral or chemical admixture.
If the concrete mix is properly designed, it does do not need any admixture. However, there may be a need to produce concrete with a particular result and using admixture could be the most convenient way. It is very important to note that any type of admixture should be used only when there is a valid reason for using it.
There are several types of admixtures available but the most popular and most often used is the plasticizer. The plasticizer is a chemical admixture and this publication covers in detail its classification, interaction, useful effects on concrete properties and precautions to be exercised in its usage. Plasticizers have been extensively used in concrete mixes for the past three decades the world over. However, in India this usage has considerably increased in the last five years. Plasticizers or other type of admixtures are not a substitute or badly designed concrete mixes or bad construction practices. They are aids to modify good mixes and good construction practices to achieve certain specific requirements which can be conveniently achieved. There are two types of plasticizers. The ordinary plasticizer is one type and the other is a superior plasticizer or superplasticizer.
For more details view or download
