Ordinary Concrete Mixes:

Nominal concrete mixes are made without preliminary tests. In ordinary concrete, no trial mixes are done in the laboratory. These concretes are used when use of controlled concrete is not practicable. Ordinary concretes are of grades M10, M15, M20 and M25. Ordinary concrete mixes offer simplicity and under normal circumstances, they have a margin of strength above that specified. Nominal mixes do not account for the varying characteristics of the concrete materials and may result in under- or over-rich mixes. The nominal mix is expressed within terms of aggregate/cement ratios through volume generally. Bulk density has to be considering in case of weigh batching. Within selecting the ratio of fine to coarse aggregates, appropriate modifications or adjustments have to be made.