... mainly on the building site, andthe latter mainly in the production of glass-fibre-reinforced concrete products,commonly known as GRC products. A detailed discussion of fibre-reinforced concrete ... pp.4 35 41. 5. 15. ACI Committee 3 05, Hot weather concreting (ACI 3 05, R-89). In ACI Manualof Concrete Practice (Part 2). ACI, Detroit, MI, USA, 1990. Copyright 1993 E & FN Spon 5. 2.1.2. ... expectedto increase shrinkage due to their delaying effect on setting of concrete. Thisexpected effect is confirmed by the data of Fig. 5. 6, and is discussed in somedetail in section 5. 2.1.1. 5. 2.1 .5. ...