how much quantity of blocks, cement and sand is required to
complete 1sq.m of CC Hollow blockwork. Size-16"x8"x8". Also
what is the cement sand ration commonly used?
Answers were Sorted based on User's Feedback
Answer / k.amirthalingam
Quantity of material used for a Hollow block work
(400X200X200)?
1. Qty of HOllow block is 10 to 12 numbers / Sqm
2. Cement sand ratio preferable is 1:4
3. For 1:4 CM the cement, sand calculation as follows
Volume of mortor = Horizontal joints 5 rows of 200 mm wide
20 mm thick = 5*.2*.02 = .02 cum
Volume of verticaljoints : 5*2.5*.2*.2*.02 = .01 cum
Total = .03 + 30 % wastage = 0.039 Cum of Cement Mortor
For 1:4 ratio
Weight of cement in 1 Sqm = .039*1*(1/5)*1440 = 11.232
Kg /Sqm
Volume of Sand = .039*1*(4/5) = .0312 Cum = 1.11 Cubic foot
NOTE: But in actual it occurs more than the above
calculated values because many unskilled people filling the
hollow portions of the block. This is the wrong practice.
The Laying system is such that the hollow portion to be
overlapped with filled portion hence the hollow portion to
be maintained. This will give good heat reduction inside
the building.
For more queris mail me at ameerabic@gmail.com
K.Amirthalingam from Ariyalur
Is This Answer Correct ? | 134 Yes | 47 No |
Answer / balamurugan
1.Qty of Hollow block is 11 to 12 Nos/ sqm
2.For 9" wide wall Cement sand ratio is 1:6 & 4" wide wall
Cement sand ratio is 1:4.
Volume of mortar/Sqm = (No of Blocks required for the size
of without mortar thick -No of Blocks required for the size
of block including mortar thick)x No of Blocks required for
the actual size of block
For 9" wall
No of Blocks required for the size of without mortar
thick=1/(0.40*.20*.20)=62.5
No of Blocks required for the size of block including mortar
thick= 1/(0.41*.21*0.21)=53.31 Nos
Volume of mortar/Cum= [62.5-55.31]x[0.4x0.2*0.2]
=0.115 Cum
Add wastage 30% extra
Volume of mortar/Cum= 0.115*30% =0.150Cum
Cement sand calculation/Cum of Block work:
Ratio 1:6
Cement =[1/7*1440]*.150 =31Kg
Sand =[(6/7)*.15]=0.129Cum =4.55 Cft
Cement sand calculation/Sqm of Block work:
Ratio 1:6
Cement =[1/7*1440]*.15*.23 =7.13Kg
Sand =[(6/7)*.15*.23]=0.03Cum =1.05Cft
Is This Answer Correct ? | 79 Yes | 39 No |
Answer / estimator
1. the quantity of CHB required per sq.m. is equal to area to be filled divided by the area of CHB
= 1 sqm / ( 0.4x0.2 ) = 12.5 CHB, approx. 13 CHB (16"x8"x8)
2. computing the mortar required using the density of 1 bag of portland cement (1506 kg/cu.m) and density of dry sand (1602 kg/ cu.m)
* volume of mortar horizontal joint = 5row x 0.2m x 1.0m x 0.01m = 0.01cu.m
* volume of mortar vertical joint = 4row x 0.2m x 1.0m x 0.01m = 0.008cu.m
* total mortar required = 0.01 + 0.008 = 0.018cu.m
3. using the commonly used ratio for making a good mortar 1:3,
* quantity of cement required = 1/4 (density of cement x total vol of mortar) = 1/4(1506x0.018) = 6.78kgs
* quantity of dry sand required = 3/4 (density of dry sand x total vol of mortar) = 3/4(1602x0.018) = 21.63kgs
Is This Answer Correct ? | 35 Yes | 12 No |
Answer / s.dhote
how much quantity of blocks,cement and sand is required to complete 1sq.m of cc solid blockswork.size 2'*8"*8".also what is the cement sand ratio commonly used?
Is This Answer Correct ? | 33 Yes | 10 No |
Answer / er.k.pratabchandran
BLOCK SIZE :390*190*190MM(ON MUSCAT)
WITHOUT C.M NOOFBLOCK IS=1/(0.39*0.19*0.19)=71NOS
WITH C.M NOOFBLOCKS IS=1/(0.40*0.20*0.20)=62.5NOS
C.M=(71-62.5)=8.5NOS*(0.39*0.19*0.19)=0.119CUM
REQUIREMENT FOR C.M1:5=1/5*1440=288KG=5.76BAGS/CUM
FOR 0.119CUM=5.76*0.119=0.68BAGS(WITHOUT WASTAGE)
FOR SAND C.M=1/5*1.57(FACTOR FOR FINESAND)=0.314CUM
FOR 0.119CUM=0.314*0.119=0.037CUM=1.30CFT(0.037*35.315=1.30CFT)
Is This Answer Correct ? | 23 Yes | 5 No |
Answer / alpesh patel
how many cement& sand consumption for 600*200*200 light weight block (1:5 ratio)in 1m3
Is This Answer Correct ? | 23 Yes | 6 No |
Answer / saikat roy
Above all 2 ans should be factored with 1.4 for wet to dry volume conversion.
Is This Answer Correct ? | 15 Yes | 6 No |
Answer / p mathan kumar b.e.,
1. I have used light weights block sizes 590*200*200
2. Volume Mortar = (42.3-37.8) *0.59*0.2*0.2
3. 1.06 cu.m
4. Mortar ratio 1:4
5. Volume of cement = 1.06*1/5=0.0213 cu.m*1440=30.58 kg
6. Volume of sand= 1.06*4/5=0.848 cum
Is This Answer Correct ? | 3 Yes | 0 No |
Do you want to see the consumption of cement in each building block on the beton aloka site?
Is This Answer Correct ? | 0 Yes | 0 No |
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