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.
Explain Kelly Ball to measure the workability of concrete. Mention the limitation of the test.
How standard consistency test is done on cement? Explain the procedure briefly.
What are the Classification of irrigation projects.
What is the impact of soil permeability on irrigation efficiency?
What role do meander cutoffs play in river dynamics?
What is Kor watering and Kor Period?
What are the key components of a drip irrigation system?
Write notes on Mixing and Mixer machines of concrete.
What factors should be considered when designing cross drainage structures?
