A Mix Design For RCC Dams

RCC stands for Roller Compacted Concrete that is commonly used for dams in hydro power plants.

Below is a typical mix design that meets the normal requirements of a RCC dam. Depend on project specifications and actual conditions of the construction sites, the proportions and components of the mix may vary.

RCC Mix Design (for 1 cubic meter of concrete)

Component	Unit	Quantity	Remarks
OPC cement	kg	80
Pozzolan (filler)	kg	120
Sand	kg	800	Sand/Aggregate = 38%
Aggregate	kg	1,300	Combined of 3 sizes of aggregates from 5mm to 80mm
Water	liter	135	W/C = 0.68
Plasticizer	liter	1.6	0.8 liter/100 kg of binders

Compressive strength at 90 days: 15 MPa

Initial Setting time: 21 hours

Final setting time: 45 hours

Vebe time: 10-12 seconds

Density: 2.44

Air Content: 1.5%