Quantity of Cement and Sand Calculation in Mortar
To estimate the quantity of cement mortar needed for rate analysis of brickwork and plaster, as well as for the estimation of masonry work for a building or structure, different proportions of cement mortar are used. These proportions can range from 1:1 to 1:8, depending on the specific needs of the project. The use of cement mortar is essential for ensuring the structural integrity of the building or structure, and it is important to calculate the correct amount required to avoid delays or shortages during the construction process. By accurately estimating the quantity of cement mortar needed, builders and contractors can better plan and manage their resources to ensure timely and efficient completion of the project.
Calculation of quantity of cement mortar in brickwork and plaster:
To calculate the amount of cement and sand required for 1 cubic meter of cement mortar, we need to follow a specific procedure. First, we need to calculate the dry volume of the materials required for 1 cubic meter of cement mortar. This is done by taking into account the voids in the sand, assuming that the materials contain 60% voids. Therefore, for 1 cubic meter of wet cement mortar, we need 1.6 cubic meters of materials.
Next, we need to calculate the volume of sand required for the desired proportion of cement and sand in the mortar. Let’s assume that the proportion of cement and sand in the mortar is 1:X, where X represents the volume of sand required. To determine the volume of sand required for 1:X proportion of 1 cubic meter of cement mortar, we use the formula:
Volume of sand = (X/1) × (1.6/ (1+X))
Using this formula, we can calculate the volume of sand required for any given proportion of cement and sand in the mortar, based on the assumption of 60% voids in the sand.
3. Volume of cement will be calculated as:
The context given is a statement about the volume of a bag of cement. Specifically, it states that the volume of 1 bag of cement is 0.0347 m3. No other information is provided in this context.
To calculate the number of bags of cement needed for a particular project, additional information is required, such as the desired volume of the cement mixture or the surface area to be covered. Without this information, it is not possible to determine the number of bags of cement needed.
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.