Mortar Tests as a Guide to the Strength of Concrete

It has been realised for a number of years that the present form of strength test included in the British Standard Specification for Portland cement has a very limited relation to the strength properties required from the cement in practice. Although the test is of value in so far as it may provide an assurance that the cement, when used with sound aggregates, will produce mortars and concretes of adequate strength for many purposes, it does not place the various marketed cements in an order of strength which can be related in any known way to the strength of products made from the cement.

W.H. Glanville