Cement Concrete | | | | In the construction of building work, there is need of various types of building materials which are used during the construction work at different stages. According to structural drawing, cement concrete of different qualities or mix are used in the building at different stages according to the type of building. Details of various qualities or mix used in different types of buildings at different stages are as under.
Cement concrete 1:8:16
Where cement concrete 1:8:16 ratio is used it means 1 part of cement 8 parts of fine aggregate/ sand and 16 parts of coarse aggregate. This ratio cement concrete is very low in strength and is recommended for the following type of building and work:-
- Used in foundation of walls of ordinary and single story building.
- Used in foundation of semi permanent structure.
- Used in foundation of temporary structure.
- Used in foundation of toe walls.
- Used as base coat under floors and pavement.
- Used in foundation of boundary walls.
Cement concrete1:6:12
Where cement concrete 1:6:12 ratio is used it means 1 part of cement 6 parts of sand and 12 parts of coarse aggregate. This ratio cement concrete is low in strength and is recommended for the following type of building and works:-
- Used in foundation of two or three story buildings.
- Used in foundation of abetments, piers and retaining walls.
- Used in foundation where low bearing capacity of soil is obtained.
- Used as basecoat under taxi tracks, pavement and cement concrete road.
- Used as base coat in floor of stream in bridges and culverts.
Cement Concrete 1:4:8
Where cement concrete 1:4:8 ratio is used it means 1 part cement 4 parts of sand/fine aggregate and 8 parts of coarse aggregate. This ratio cement concrete has medium strength and is recommended for the following type of buildings and works:-
- Used in foundation of multi story buildings.
- Used in foundation where low bearing capacity of soil is obtained
- In buildings where there is more vibration due to heavy traffic or running of factory.
- Under foundation of RCC columns, stairs, raft, RCC walls.
- Where water table is high.
- At the places where less depth of foundation available due to site condition.
- Air strips and taxi tracks base coat.
Cement Concrete 1:3:6Where cement concrete 1:3:6 ratio is used it means 1 part cement 3 parts of fine aggregate or coarse sand and 6 parts of coarse aggregate. This ratio cement concrete has medium strength and is recommended for the following type of buildings and works:-
- Used in mass concrete, bed plates, concrete blocks, canal lining and chowkats hold fast etc.
Cement Concrete 1:2:4
Where cement concrete 1:2; 4 ratio is used it means 1 part cement 2 parts of fine aggregate or coarse sand and 4 parts of coarse aggregate. This ratio cement concrete has good strength and is recommended for the following type of buildings and works:-
- Used in footings of columns and raft foundation.
- Used in beams, slabs, columns, stairs and walls of ordinary, single story and temporary buildings.
- Used in retaining walls, pavements, floors and bedplates etc.
Cement Concrete 1:1.5: 3Where cement concrete 1:1:5:3 ratio is used it means 1 part cement 1.5 parts of fine aggregate or coarse sand and 3 parts of coarse aggregate. This ratio cement concrete has very good strength and is recommended for the following type of buildings and works:-
- Important RCC structures, piles, arches, impermeable construction against water heads.
- This ratio of cement concrete is safe against earth quake.
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| Related tips | - Line and levels of the form work should be checked in centering and shuttering work otherwise the concrete structure would not be required shape.
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| 1 Comment(s) |
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| | By JAI - On 6/18/2010 3:22:03 PM | | WONDERFUL KNOWLEDGE PIECE |
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