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The artificial sand produced by proper machines can be a better substitute to river sand. The sand should be sharp, clean and course. The grains should be of durable material. The grain sizes must be such that it should give minimum voids. The presence of clay and silt retards the setting of the cement and makes the mortar weaker and the walls or the slab leaks and holds dampness
The sand in the mortar does not add any strength but it is used as an dulterant for economy and with the same it prevents the shrinkage and cracking of mortar in setting. The sand must be of proper gradation (it should have particles from 150 microns to 4.75 mm in proper proportion) When fine particles are in proper proportion, the sand will have less voids. The cement required will be less when there will be less void in sand. Such sand will be more economical
Only sand manufactured by V.S.I. Crusher is cubical and angular in shape. Sand made by other types of machines is flaky, which is troublesome in working. There is no plasticity in the mortar. Hence the mason is not ready to work with machine made crushed stone sand. For the same reason, inferior river sand may be used. Manufacturing sand from jaw crusher, cone crusher, roll crusher often contains high percentage of dust and have flaky particle. Flaky and angular particles may produce harsh concrete, and may result in spongy concrete. Flaky particles increase voids over cubical or spherical particles about 5 to 6 percent more, and reduces the strength of concrete
So, the process of manufacturing should be such that it should give Cubical particles. Vertical shaft Impactor principle is used for crushing bigger particles, for shaping the crushed metal (giving better shape of the particle) and for crushing fines aggregates below 4.75 mm. It is best machine for making sand from stone. Sand manufactured by Vertical Shaft Impactor is of cubical shape. Such sand can be used for all types of construction work, Concreting, plastering etc. and is better substitute to river sand. V.S.I. Crushers is a most economical machine for Crushing Stone in Cubical shape and manufacturing artificial sand. In this machine, the particles are thrown at a high speed. Those particles colloids in crushing chamber on anvil or stone lining. Rubbing of the particles with each other grounds the edges and also the surface texture
Our operations are based on unique expertise in materials technology, extensive knowledge about industrial processes and close customer cooperation. This combination, coupled with continuous investments in research and development (R&D), has enabled us achieve leading positions in the following areas:
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