R. C. DE VEKEY Building Research Establishment

BS5628: Part 2 for the design of reinforced and prestressed masonry allows the use of concrete and grout infill in small voids in masonry as a means of protecting carbon steel reinforcement. There are a number of problems in achieving good cover to reinforcement in such narrow, irregular and absorbent ‘shuttering’ which are likely to be either directly sensitive to workmanship or a result of incompatibility of materials used to overcome workmanship problems. The paper reviews the workmanship and related factors and discusses some of the solutions currently under investigation.