The detailed specification is a document that specifies the qualities, quantities, and proportion of materials, method of preparation, execution, etc in detail.
Detailed Specification Of Reinforced Cement Concrete(RCC)
Here are the step by step detailed specifications of reinforced cement concrete(RCC)-
1- Cement Materials
In the reinforced cement concrete (RCC) the cement is fresh portland cement of grade 33 and the cement takes according to I.S. 269 specifications.
2- Coarse Aggregate Materials
The coarse aggregate must be free from dust, dirt, and other unwanted materials, and the coarse aggregate is stone chips of granite or other similar stones.
The stone chips of coarse aggregate must be retained on a 4.75mm I.S sieve and the size of these stones are 20mm.
The coarse aggregate takes according to I.S. 383 specifications.
3- Fine Aggregate Materials
The fine aggregate must be free from dust, dirt, and other unwanted organic matters.
Fine aggregate consists of hard, sharp, and angular grains, and this fine aggregate must be retained on 150 microns I.S. sieve.
And the fine aggregate shall be passed through a 4.75mm I.S. sieve.
The fine aggregate takes according to I.S. 383 specifications.
In the reinforced cement concrete (RCC) portable water is used.
In the RCC the steel reinforcing bars must be free from corrosion, loose rust, scales, oil, grease, paint, etc.
The steel reinforcing bars in RCC shall be of tor steel or mild steel and these bars shall be hooked and placed in position according to the design and drawing.
The steel reinforcing bars are bound together with binding steel wire.
6- Centering and shuttering
In the RCC the centering and shuttering must be made of timber and tight with wedges.
In the suttering fan clamps and other fitting connections shall be provided according to the Engineer-in-charge.
7- Cement Concrete Proportion
In the RCC the ratio of cement, sand, and stone chips is 1:2:4, and the ratio of the slab, beam, and lintel is 1:3/2:3.
The measurement of cement shall be measured by the number of bags and sand and stone chips shall be measured by weight.
8- Mixing Of Concrete
First, the required proportion of stone chips, sand, and cement is put into a mixer and the mixing of concrete is starts and after some time the required water is added to the materials.
After 2 minutes of thorough mixing of cement, sand, stone chips, and water the mixed concrete is ready for use.
9- Laying Of Concrete
The laying of concrete is not exceeding 150mm and the laying of concrete must be compacted by wooden thapi or other equipment like a vibrating machine.
The process of laying of concrete shall be continuous if the continuity breaks for a day or for some hours then in this situation the concrete end is made roughened and the end shall be at an angle of 30 degrees for the good joint when the work starts in the future.
The surface of laid concrete shall be cured after 24 hours of laying concrete work with the water above 25mm depth.
The curing process for the laid concrete must be carried out for 14 days minimum.
11- Removal Of Formwork
The removal of shuttering and the centering must be carried in such a way that it does not damage our main structure.
The measurement of RCC finished work is taken in m3 and the measurement of steel reinforcement is taken in quintal.