Penulis
Rate analysis for cement mortar requires estimation of materials for cement mortar, i.e. the quantity of cement and sand required for 1m3 for various proportions, i.e., CM 1:2, 1:4, 1:6, 1:8, etc. So, let us first calculate the quantity of cement and sand required for 1m3 of cement mortar.
For 1m3 of wet cement mortar, 1.3m3 of cement and sand is required, due to presence of voids in sand in dry state. So, cement and sand quantity is calculated for 1.3m3 of cement mortar.
Estimation of Materials for Cement Mortar:
Steps for calculation of the quantity of cement and sand for cement mortar:
Consider, we want to calculate the quantity of cement and sand for CM 1:X, where, 1 is the proportion of cement and X is the proportion of sand. Then, the quantity of cement shall be calculated as:
Quantity of cement =
The above formula gives quantity in volume. To calculate the quantity of cement in the number of bags, we have to divide it by volume of cement of one bag. The volume of one bag of cement is 0.0347 m3.
Therefore, the number of bags of cement =
Quantity of sand = 
For example, for a proportion of CM 1:4,
Quantity of cement in bags = 
=7.492 bags
=7.492 bags
Quantity of sand = 
= 1.04 m3 of sand.
= 1.04 m3 of sand.Estimation of Labour and Tools for cement mortar:
For 1m3 of cement mortar, semi-skilled labor is required for 0.27 days for mixing, unskilled labor for 0.26 for carrying of cement, sand, and water. Hire charges for the mechanical mixer is taken in lumpsum of can be taken as 0.27 days for mixing 1cum of mortar.
Rate Analysis of cement mortar:
Rate analysis of cement mortar requires the rate of cement and sand multiplied with their respective quantity. The cost of labor and tools and tackles for the cement mortar is also calculated. The cost of cement, sand, labor, and tools depends on local availability and local rates.
When, the quantity of cement, sand, labor, and tools are multiplied by its rates, and a contractor's profit of 10-20% is assumed, the total sum of the amount is taken as the cost of 1m3 of cement mortar, which is shown in the file below.