Early-age shrinkage behaviour of CEM I and fly ash combinations

Authors: N.A. Vemuri, M.D. Newlands, K.A. Paine, R.K. Dhir
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 474 – 481
Total Pages: 8
Language: English

Abstract: Early-age shrinkage is a potential concern particularly due to the increase in use of new generations of concretes with new materials being developed for sustainability. Early-age shrinkage of concrete occurs while it is still in a semi fluid or plastic state. This can lead to cracks on the surface which in turn can lead to further durability concerns. It is evident that a lack of associated data and guidance on early-age shrinkage of concretes using these cement combinations prevents us from a complete understanding of the mechanism. The research reported in this paper utilised a new linear test method to measure the early-age shrinkage of pastes, mortars and concrete using CEM I and fly ash based combinations (II/A-V, II/B-V and IV/B) over a range of w/c ratios (0.4, 0.5 and 0.6). Normalization analysis was carried out to compare early-age shrinkage behaviour of concretes with different cement combinations at particular design strengths of 20, 40 and 60 N/mm2.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00