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Water reducers are special chemical products added to a concrete mixture before it is poured. They are from the same family of products as retarders . The first class of water reducers was the lignosulfonates which has been used since the 1930s.
It significantly reduces water content while enhancing concrete's workability, strength, and durability. Known for its cutting-edge technology, exceptional application prospects, and superior overall performance, PCE has revolutionized concrete admixtures.
A retarder is a chemical agent that slows down a chemical reaction.For example, retarders are used to slow the chemical reaction hardening of plastic materials such as wallboard, concrete, and adhesives.
In order to reduce the energy consumed drying wallboard, less water is added, which makes the gypsum mixture very unworkable and difficult to mix, necessitating the use of plasticizers, water reducers, or dispersants. Some studies also show that too much lignosulfonate dispersant could result in a set-retarding effect.
Superplasticizers are concrete admixtures designed to increase the concrete fluidity and workability of concrete or to decrease its water-to-cement (w/c) ratio. By reducing the water content in concrete, it decreases its porosity, improving so the mechanical properties (compressive and tensile strength) and the durability of concrete (lower ...
The performance of a concrete mix can be altered by use of admixtures. Admixtures can be used to reduce water requirements, entrain air into a mixture, to improve surface durability, or even superplasticise concrete to make it self-levelling, as self-consolidating concrete, [14] the use of admixtures requires precision in dosing and mix design ...
Master Builders played a role in this era by advancing concrete technology with the introduction of the first commercial water-reducing admixture in 1931, Pozzolith (sodium lignosulfonate). This innovation improved the quality and durability of concrete construction and reflected a shift in the industry.
Air entrainment in concrete is the intentional creation of tiny air bubbles in a batch by adding an air entraining agent during mixing. A form of surfactant (a surface-active substance that in the instance reduces the surface tension between water and solids) it allows bubbles of a desired size to form.