Fine aggregates are the aggregates whose size is less than 4.75 mm.
Example: Sand is used as fine aggregate in the preparation of concrete and cement mortar.
bulking of fine aggregate increases its volume. hence the mass for a given volume is less, which leads to richer mix than required. therefore batching of fine aggregate must be done by weight and not by volume.
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RCC that is reinforced cement concrete which is composed of cement(mainly),sand(fine aggregate),metal(coarse aggregate)and water.Which is further more supported by iron which makes it RCC from ordinary cement concrete.
For M7.5 the ratio is 1:4:8 i.e 1 part of cement, 1 part of fine aggregate (Sand) and 1 part of coarse aggregate.
Gravel can be composed of varying sizes of stone, sand, and fine dust, with the coarse stone measuring up to about 2 inches. Large stone is often referred to as ballast or sometimes, pit run. Even larger stone (6" to 24") is called rip-rap. Rip-rap is used to armor the soil to prevent erosion from water runoff. If you are using boulders or rip-rap, then gravel would probably be considered a fine aggregate. But if you are using gravel under a new sidewalk, say, then gravel would be somewhat coarse compared to the sand and fine dust in it.
fine aggregate zone classification codes
Why it is not suitable for all concrete mixture when the amount of fine aggregate and coarse aggregate is fixed?
bulking of fine aggregate increases its volume. hence the mass for a given volume is less, which leads to richer mix than required. therefore batching of fine aggregate must be done by weight and not by volume.
Cement mortar is a mixture of cement, fine aggregate and water.Concrete is a mixture of cement, fine aggregate, coarse aggregate and water.Generally, concrete have higher strength than cement mortar.
passing sieve #4
mix ratio is 1 : 2 : 4 cement : fine aggregate : course aggregate
rock crushing
Cement : Fine Aggregate : Coarse Aggregate 1 : 1.5 : 3
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1:1.5:3:0.45 (cement,fine aggregate,coarse aggregate, water cement ratio)
they give a goodstrength for concrete
Water, Cement, fine aggragate, course aggregate and sometimes add mixtures.