Viongezeo vya Zege nyepesi | Mawakala wa Utendaji wa Juu wa Kutoa Mapovu kwa Saruji ya Simu
A cement water reducer is a chemical admixture that decreases the amount of water used in concrete. Kupungua huku kwa maji kunaruhusu zege kumwagilia kwa kiwango cha chini, giving it better strength and durability.
Vipunguza maji ya kiwango cha chini, also known as normal water reducers or regular plasticizers, typically lower the amount of water in a mix by 5 kwa 10%. These water reducers are often used in everyday concrete applications such as driveways, njia za barabarani, and basement walls.
Vipunguza maji vya kati, also called plasticizers or intermediate plasticizers, typically lower the amount of concrete that needs to be mixed by 15 kwa 20%. These admixtures are often used in concrete for flatwork, such as driveways and sidewalks, because they reduce the water needed to produce a good-quality surface.
High-range water reducers, also known to be superplasticizers or high range admixtures, are synthetic water-soluble organic compounds that decrease the amount of water in concrete by 25 kwa 30%. This results in a higher fluidity of the concrete, allowing it to flow better and provide more flexibility for placements.
These admixtures are usually added to the concrete mixture at a low dosage rate, although some high-range admixtures require a higher dose for optimal performance.
Most of these admixtures have no effect on the hydration of the cement, but some – like polycarboxylates – may increase air entrainment. This will vary depending on the chemistry of the admixture and its dosage rate. It is important to select the proper admixture for the application.