Discuss plasticizers and superplasticizers, indicating their purpose. Name some products and their dosage for use as plasticizers and superplasticizers.
PLASTICIZER :- Plasticizers is used mainly to fluidity the mix and improve the workability of concrete, mortar or grout. Plasticizers are high range water – reducers. When plasticizers are used they get absorbed on the cement particles and form a thin sheath. This thin sheath inhibits the surface hydration reaction between water and cement.
SUPERPLASTICIZERS:- They are high range water reducers used for producing self compacting self strength and high performance concrete.
Short notes on :
Explain Kelly Ball to measure the workability of concrete. Mention the limitation of the test.
