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# RATE ANALYSIS OF CEMENT MORTAR

Rate analysis for cement mortar requires estimation of materials for cement mortar, i.e. 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 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.

Volume of mortar= 1 m³

Mix Ratio –> 1:6

Dry volume of mortar = Wet volume x 1.33

Dry Volume = 1.0 m³x 1.33 = 1.33 m³

Quantity of Cement = {(Dry Volume of mortar x Cement ratio) / (Sum of the ratio)}

∴Quantity of cement = (1.33 x 1) /(1+6)=0.19m³

Density of Cement = 1440kg/m³

∴ Weight of Cement = 1440 x 0.19 = 273.6Kg

1 bag of cement contains 50 kg of cement

∴ Number of bags = 273.6 Kg/50 = 5.472 No’s

Cement : Sand :: 1:6

Quantity of Sand = Quantity of Cement x 6

∴ Quantity of Sand = 0.19 m³ x6= 1.14 m³

1m³=35.3147 Cubic Feet (CFT)

∴ Quantity of sand = 1.14 x 35.3147 = 40.258 CFT

Density of sand = 1920kg/m³

∴ Weight of the sand= 1.14m³x1920kg/m³= 2380.8 kg =>2.3808 tonnes

Material Cost:

 Material for one cu. m. Quantity rate per Amount Cement 5.472 bags Rs. 350 bag Rs. 1915.2 Sand 1.14 m³ Rs. 1350 m³ Rs. 1539 Total Rs. 3454.2

Labour Cost:

 Labours for 1m³ No’s Wages/day Amount Mazdoor 0.75 Rs. 500 Rs. 375 Bhisti 0.07 Rs. 400 Rs. 28 Rs. 403

Summary:

Cost of material = Rs. 3454.2

Cost of labours = Rs. 403

Sum of labour & material cost= Rs. 3857.2