<p>RCC-20SCCM: Compressive strength, f'c=20 MPa at 28 days on standard cylinders, cement conforming to BDS EN 197-1:2003 CEM II/A-L/M/V/W 42.5N, sand of minimum FM 2.2 and 20mm down well graded crushed stone chips (LAA &lt;=35), water reducing admixture of complying type A under ASTM C 494&nbsp;</p><p>[Using Concrete Mixture Machine and retail rate of Cement]</p>