concrete plasticiser is an admixture used to improve the workability of concrete in various situations. This is particularly useful when the concrete needs to be placed in areas of restricted space such as deep beams, thin sections with high percentage of reinforcement, slab and column junctions etc. It is also very important in situations where a very high degree of workability is required such as pumping of concrete, tremie concreting etc.
The plasticizer increases the fluidity of the concrete mix. However, it does not change the final properties of the hardened concrete. It also allows a lower quantity of water to be used in the concrete and therefore, saves on the cost of water and cement. It can also reduce the heat of hydration in mass concrete, thus saving on energy costs.
Plasticizers can be of different types: 1. Ligno sulfonic acid and its salts 2. Polyglycerol esters 3. Hydroxylated carboxylic acids and their derivatives and changes
concrete plasticisers are an essential ingredient in construction to help achieve the desired strength, durability and quality of the building material. They can increase the workability of concrete, allowing more concrete to be placed in less time. They can also reduce the water-to-cement ratio without hindering workability and prevent cracks and shrinkage in the finished concrete. They can also help with the transport of concrete over long distances, as well as cut labour requirements and costs. In this way, they have played a vital role in advancing the construction industry and enabling it to meet the demands of modern life.