how we calculate of sand

8/11/2019 How We Calculate of Sand

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how we calculate of Sand, cement and aggregate of M20 ratio or other ratio?

Ex. 1:1.5:3 is the ration of M20 and now how much sand or cement or aggregate we

use in this?

M20 = 1:1.5:3

Volume = 1+1.5+3=5.5

Total volume ingredients for using =1.57

Volume of broken stone Require = (3/5.5) x 1.57 = 0.856 m3

Volume of sand Require = (1.5/5.5) x 1.57 = 0.471 m3

Volume of cement = (1/5.5) x 1.57 = 0.285 m3

= 0.285 x1440 = 411 kg

For 1m3 of M20 (1:1.5:3)

Broken stone = 0.856 m3Sand = 0.472 m3

Cement = 8.22 bag

Brick Calculator

When you are planning your project it will become very important for you to be able to

learn how to calculate the number of bricks in your wall. The cost of even the most

common bricks has become very expensive, especially if you go for so called Hand

Made bricks can be as much as 1 each, that`s before we even talk about Specials

which would be used for things like window cills, window head detailing and

architectural strings of bricks.

How to calculate the numbers of bricks

It is quite simple how to work out the number of bricks you will require, but there are a

few considerations you must consider:

Thickness of the wall to be built

Amount of openings

Amount of detail in the wall ie: Decorative panels, Dentilation or Dogtooth String

Courses

Knowing the thickness of the wall is the most important thing to know, firstly we will talk

about the standard facing brick: The standard size brick used in the UK today is 215mm

x 102.5mm x 65 mm, together with the use of a 10 mm mortar joints that run both

horizontally and vertically.


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The rule of thumb for working out the number of bricks, you will have to work out the

total area of your building you are going to clad with brickwork, for every square m2 you

have, you have to multiply this by 60. So if you have a wall that is 6 metres long and 2

metres high, you will have a square area of 12 m. So we will need to order 720 bricks.

Please allow about 10% wastage, this can be due to transport or just moving the bricks

around your project, some bricks can be quite fragile: so to clarify:

Single Skin Wall

6m x 2m = 12 square metres x 60 (number of bricks in a square metre) = 720 + 10%

wastage = 792 bricks required

Double Skin Wall

6m x 2m = 12metres x 120 = 1440+ 20% wastage = 1728 bricks

Note: On the double skin wall I would allow for a little less wastage.

Blockwork Calculator

Block are a standard size for most applications these days and would normally be: 440

x 215 x 100mm plus 10 mm joints. You will need 10 blocks per square metre, so we

would use the dimensions stated above to come to the same total.

6m x 2m = 12m x 10 blocks = 120 blocks

If you are employing the services of a professional`s building company, you can use

these calculations to check their quantities. Part of a professionals knowledge is to keep

wastage down to a minimum and handle the bricks with care, wastage means money!

QUANTITY OFCEMENT & SAND CALCULATION IN MORTAR

Quantity of cement mortar is required forrate analysis ofbrickwork and

plaster or estimation of masonry work for a building or structure. Cement

mortar is used in various proportions, i.e. 1:1, 1:2, 1:3, 1:4, 1:6, 1:8 etc.

Calculation of quantity of cement mortar in brickwork and plaster:

For the calculation of cement mortar, let us assume that we use 1m3of

cement mortar. Procedure for calculation is:
http://theconstructor.org/building/building-material/cement/http://theconstructor.org/practical-guide/rate-analysis/http://theconstructor.org/practical-guide/work-procedure/brickwork/http://theconstructor.org/practical-guide/work-procedure/brickwork/http://theconstructor.org/practical-guide/rate-analysis/http://theconstructor.org/building/building-material/cement/


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1. Calculate the dry volume of materials required for 1m3cement mortar.

Considering voids in sands, we assume that materials consists of 60% voids. That

is, for 1m3of wet cement mortar, 1.6m3of materials are required.

2. Now we calculate the volume of materials used in cement mortar based on itsproportions.

Lets say, the proportion of cement and sand in mortar is 1:X, where X is the

volume of sand required.

Then, the volume of sand required for 1:X proportion of 1m3cement mortar will be

3. Volume of cement will be calculated as:

Since the volume of 1 bag of cement is 0.0347 m3, so the number of bag of cement

will be calculated as:

Example:

For cement mortar of 1:6, the quantity calculated will be as below:

Sand quantity:

Quantity of cement (in bags):

Volume of cement =

There number of bags required = = 6.58 bags.


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how we calculate of sand

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