Fast-Track Concrete Construction Using Cement Replacement Materials
S. J. Barnett, M. N. Soutsos, J. H. Bungey, and S. G. Millard
Appears on pages(s):
concrete; construction; fly ash; ground granulated slag; strength; temperature
The early age strength development of concretes containing fly ash and ground granulated blast furnace slag has been investigated in order to give guidance for their use in fast track construction. Their use in concrete, although economic, has not gained popularity in fast track construction because of the slower strength gain of these concretes at standard curing temperatures. There are however indications that these cement replacements are heavily penalised by the standard curing regimes. The continuous measurement of the in situ temperatures during a UK Concrete Society Core Project has allowed the early age strength development of concretes in full-scale structural elements to be monitored. The effects of a range of environmental conditions and structural element parameters, including cement replacements, on the early age temperature history and hence the strength development of these concretes has been quantified. High early age temperatures are shown to be especially beneficial to ground granulated blast furnace slag concretes.