Method of checking the slump of a ready-mix concrete load

摘要

A method is described of checking the slump value of a ready-mix concrete load at the point of delivery in a delivery vehicle (10) of the kind having a rotatable drum (11) in which the concrete load is contained. The method comprises determining a measure of the work required to rotate the drum (11) to produce first data, transmitting information to a base (16), the information dependant upon the first data, determining the slump value of the concrete load from the first data either at the point of delivery or from the transmitted information at the base (16) and storing the information or the slump value at the base (16) whereby an independent record of the slump value of the concrete load at the point of delivery is made at the base (16).