Concrete Mixing Designs and Material Requirement

Concrete Mixing Designs and Calculations for 1 Cu

Description	Unit	1:1 ½:3 (G25)	1:3:6 (G15)	1:2 ½:5	1:2:4 (G20)	1:1:3 (G30)
		Quantity	Quantity	Quantity	Quantity	Quantity
Cement (50kg Bags)	Nr	23	13	14	18	31
Sand	Cu	0.47	0.53	0.6	0.5	0.44
Metal	Cu	0.82	0.92	0.9	0.88	0.76
Hire of Mixer	Day	0.333	0.333	0.333	0.333	0.333
Water	Gal	150	110	100	120	200
Skilled Labourer	Day	0.333	0.333	0.333	0.333	0.333
Unskilled Labourer	Day	2	2	2	2	2
Total for 1Cu of Concrete

There are different types of concrete we use in construction depend on the strength we need to achieve in the particular application. In order to meet the required strength of the structure, it is necessary to change the proportion of mixing of concrete elements (cement, sand, metal and water). The above table shows the commonly used concrete mixing designs in construction. It also provides the Labour and Material requirement for each mixing design. With the given data collection in the table, we should be able to calculate the required amount of the material, labor and plant for each mixing design.