Water- Cement Ratios for Various Cement Concrete Mix in Malayalam
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- Опубліковано 15 жов 2024
- Civil engineering talks by princy
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WATER CEMENT RATIO (W/C RATIO):-
It is the ratio between water and cement used in the cement concrete.
M5 GRADE CONCRETE:
W/C= 1.20
Cement=50KG
Water= 1.20x50 = 60Kg = 60Litre
M7.5 GRADE CONCRETE:
W/C = 0.90
Cement = 50Kg
Water = 0.90x50 = 45Litre
M10 GRADE CONCRETE:
W/C = 0.68
Cement = 50Kg
Water = 0.68x50 = 34Kg
M15 GRADE CONCRETE:
W/C = 0.64
Cement = 50Kg
Water = 0.64x50 = 32Litre
M20 GRADE CONCRETE:
W/C = 0.60
Cement = 50Kg
Water = 0.60x50 =30Kg = 30Litre
LOW WATER CEMENT RATIO:
• It leads high strength and also workability. But workability is very low
• Difficult to work
HIGH WATER CEMENT RATIO:
• Low strength & durability
• High permeability
• Decrease weathering resistance
• Decrease the binding between raw materials in concrete
• Develops shrinkage & cracks
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കോൺക്രീറ്റ് കഴിഞ്ഞാൽ എത്ര മണിക്കൂറിനുശേഷമാണ് നന ആരംഭിക്കേണ്ടത്
Thanks for the valuable information, and the excellent presentation. 👌❤️
River sandinu pakaram M sand anenkilum same ano
Athe,
Please explain cheyyamo please, Shear strength compressive strength tensile strength
Sure
Madam... Is there any defect in filler slab concrete?
No, till now it is considered as a good proven technology compared to RCC. Let me explain,
If we consider a simply supported slab, we know that there are 2 zones. Tension zone and compression zone. Upper part of the slab is subjected to compressive force, hence it is compression zone. Lower part of the slab subjected to tensile force, hence it is tensile zone. We know that cement concrete is very strong in compression but its too weak in tension. That is the reason why we put reinforcement in the tensile zone. Reinforcement is strong in tension, so it carries the tensile force. So, there is no need to give Concrete in tension zone, except to hold the reinforcement in correct position and give a good bond with it. Hence the conventional form of RCC slab gives a lot of wastage in concrete with increase in dead load. So, it can be replaced with low cost filler materials like bricks, tiles, terracotta pots, etc. it is called filler slab, is invented by the Ar. Laurie Baker. Filler slab will reduce the cost and weight of slab without compromising the structural strength, stability and durability.
But before the construction works started, some points should be kept in mind for filler slab. That are:
1. Water absorption of filer material should be check
2. Filler material is not an inert material, so it haven’t any reaction with concrete or steel in RCC slab constructed
3. Filler material’s weight should be low as comparing to the replaced concrete
4. Filler material’s cost should be low
5. Select the size of the filler material as considering the size of slab
Hope you got the answer...
thanks for your comment, keep watching.
Thanks for your valuable information...❤️❤️
Nice presentation 👍
Thanks a lot
Madam ,,M20 Grade concrete 30 liter is high?
No..
Thank you Mam
Thank you too
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