138. Self-compacting cement-fly ash concrete

Title: 138. Self-compacting cement-fly ash concrete
Author(s): J.M. Khatib, R. Siddique
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 915 - 921
Total Pages: 7
Nb references: 21
Language: English

Abstract: This paper presents the properties of self-compacting concrete (SCC) made with 0 to 80% of fly ash (FA) as partial replacement of cement. The water-to-binder ratio was kept constant as 0.36. Workability, compressive strength, ultrasonic pulse velocity (V), absorption and shrinkage were studied. The results indicated that high volume FA can be used in SCC to produce high strength and low shrinkage. Replacing 40% of PC with FA resulted in strength in excess of 65 N/mm2 at 56 days curing. High absorption values were obtained with increasing amount of FA, however, all FA concrete exhibited absorption of less than 2%.
There was systematic reduction in shrinkage with the increase in FA content, and at 80% FA content, shrinkage at 56 days was reduced by two-third in comparison with the control. A linear relationship exists between the 56-day shrinkage and FA content. The results indicate that there was sharp decrease in strength as absorption increases from 1 to 2%. After 2% absorption, the strength reduces at a much slower rate.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00