The usual proportion of ingredients in plain cement concrete is? Mark as favorite Copy Link Portland cement (1 part), clean sand (1 and 1/2 to 8 parts) and coarse aggregate (3 to 16 parts) Portland cement (1 part), clean sand (3 to 16 parts) and coarse aggregate (1 and 1/2 to 8 parts) Portland cement (1 part), clean sand and coarse aggregate (1 and 1/2 to 8 parts) any one of the above Check Answer