Samenvatting
Methods of manual screening of aggregate which have been used in Ethiopia and Malawi are described. The first method utilises static screens through which the aggregate is thrown and the second method utilises screens which are shaken up and down to help sift the aggregate. In the third method, the aggregate is raked and washed through static screens. Manual screening has proved to be an effective and economic way of producing aggregate when only limited quantities are required. (Author/publisher)