期刊
MATERIALS AND STRUCTURES
卷 49, 期 5, 页码 1619-1628出版社
SPRINGER
DOI: 10.1617/s11527-015-0599-1
关键词
Sustainability; Geopolymer concrete; Fly ash; Creep; Shrinkage
资金
- CRC for Low Carbon Living Ltd - Cooperative Research Centres program, an Australian Government initiative
The main purpose of this research is to study the time dependent behaviour of a geopolymer concrete. The geopolymer binder is composed of 85.2 % of low calcium fly ash and only 14.8 % of ground granulated blast furnace slag. Both drying shrinkage and creep are studied. In addition, different curing conditions at elevated temperature were used. All experimental results were compared to predictions made using the Eurocode 2. The curing regime plays an important role in the magnitude and development of both creep and drying shrinkage of class F fly ash based geopolymer concrete. A minimum of 3 days at 40 degrees C or 1 day at 80 degrees C is required to obtain final drying shrinkage strains similar to or less than those adopted by Eurocode 2 for ordinary Portland cement (OPC) concrete. Creep strains were similar or less than those predicted by Eurocode 2 for OPC concrete when the geopolymer concrete was cured for 3 days at 40 degrees C. After 7 days at 80 degrees C, creep strains became negligible.
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