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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Performance of High-Volume Fly Ash Concrete Incorporating Lime Water
Author(s): C. Gunasekera, X. H. Ling, S. Setunge, D. W. Law, and I. Patnaikuni
Publication: Materials Journal
Appears on pages(s): 289-297
Keywords: creep; drying shrinkage; fly ash; high-volume fly ash concrete; mechanical properties; microstructure development
Abstract:The use of concrete containing high-volume fly ash (HVFA) has recently gained popularity as a resource-efficient, durable, and sustainable option for a variety of concrete applications. The longterm creep and drying shrinkage of HVFA concrete containing 65% fly ash (HVFA-65) incorporating lime water has been investigated up to 1 year. Moreover, tensile strength and elastic modulus of HVFA-65 concrete have been examined in conjunction with microstructural development. The HVFA-65 concrete achieved ~200 microstrain of creep at the first 50 days; however, it only obtained approximately 100 microstrain between 50 and 365 days. This is equivalent to one-third of total creep strain displayed by portland-cement (PC) concrete, and also half of the predicted creep strain in accordance with AS 3600. Amalgamation of calciumalumina-silicate-hydrate (C-A-S-H) gel with calcium-silicatehydrate (C-S-H) gel was seen to positively affect the compactness and packing density of the gel matrix, which in turn influences the strength and elastic modulus development in HVFA-65 concrete. Early-age curing is also identified as significant in controlling drying shrinkage of the concrete.
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