Standard Mixes for Ordinary Structural Concrete per 50 kg Bag of Cement (Adapted from EBCS 2 – 1995)

Nominal max. size of Aggregate (mm) 40 20 14 10

Workability Medium High Medium High Medium High Medium High Concrete Grade

Limits of slump that may be expected (mm) 30 – 60 60 - 120 20 – 50 50 – 100 10 – 30 30 – 60 10 – 25 25 - 50

C 5 Total Aggregate (Kg) Fine Aggregate (%) Vol. of Finished Concrete (m3)

640 30 – 45 0.312

550 30 – 45 0.275

540 35 – 50 0.277

480 35 – 50 0.252

- - - -

C 15 Total Aggregate (Kg) Fine Aggregate (%) Vol. of Finished Concrete (m3

370 30 – 45 0.200

330 30 – 45 0.183

320 35 – 50 0.178

280 35 – 50 0.160

- - - -

C 20 Total Aggregate (Kg) Fine Aggregate (%) Vol. of Finished Concrete (m3

305 30 – 35 0.165

270 30 – 40 0.155

280 30 – 40 0.156

250 35 – 45 0.143

255 35 – 45 0.146

220 45 – 50 0.130

240 40 – 50 0.137

200 45 – 55 0.121

C 25 Total Aggregate (Kg) Fine Aggregate (%) Vol. of Finished Concrete (m3

265 30 – 35 0.147

240 30 – 40 0.137

240 30 – 40 0.137

215 35 – 45 0.127

220 35 – 45 0.130

195 40 – 50 0.118

210 40 – 50 0.124

175 45 – 55 0.110

C 30 Total Aggregate (Kg) Fine Aggregate (%) Vol. of Finished Concrete (m3

235 30 – 35 0.134

215 30 – 40 0.127

210 30 – 40 0.124

190 35 – 45 0.115

195 35 – 45 0.115

170 40 – 50 0.106

180 40 – 50 0.109

150 45 – 55 0.097