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CONCRETE
-Composite material of coarse aggregate , cement ,water and…
CONCRETE
-Composite material of coarse aggregate , cement ,water and sand bonded together
CONCRETE PRODUCTION
1)Batching
-The process of measuring concrete mix ingredients and introducing them into the mixture
-By volume or by mass
-Need proper and accurate quantity
Factors affecting the choice of batching method
-Size of method job
-Required production rate
-Required standards of batching performance
3)Transporting
Consideration
1)Size and importance the job
2)Distance of deposition place from the mixing place
3)Nature of the terrain
1)Truck with agitator
-A maximum of 2 hours from the time of mixing
2)Truck without agitator
-A maximum of 1 hours from the time of mixing
5)Compaction
-Consiladates fresh concrete in the formworks,around embedded parts and reinforcement steel
-Because air is entrapped in concrete
-Possible partial segregation
-This rids the entrapped air and voids eliminates segregation and forms a dense mass
-The density,strength,and durability of concrete depend on the degree of compaction
6) Curing
-the process of keeping concrete damp
-cement gains strength and hardness due to chemical action
- curing period must be done for at least 3 weeks and cannot be less than 10 days
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2)Concrete Mixing
- to combine cement with sand or gravel, and water to form concrete
-by hand for small quality jobs
-by mixer for quality work
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