Home List of Titles Effect of gypsum on free and restrained shrinkage behaviour of slag-concretes subjected to various curing conditions
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/197325
- Effect of gypsum on free and restrained shrinkage behaviour of slag-concretes subjected to various curing conditions
- Aly, Tarek K.; Sanjayan, Jay G.
- The effect of gypsum in slag-blended cement on free and restrained shrinkage of concrete subjected to various curing conditions is presented in this paper. Added gypsum in slag-blended cements was found to increase the autogenous shrinkage of concrete up to 56 days. However, added gypsum caused small reduction in the long-term shrinkage when the concrete was exposed to drying. Slag concretes with 3% added gypsum content, when exposed to drying at the age of 24 h, exhibited more cracking tendency than comparable concrete with 0% added gypsum. This is attributed to the increased shrinkage evolution of slag concrete with 3% gypsum content at early ages. However, if moist cured for 7 days, increasing the amount of gypsum from 3 to 5% in slag-blended cement reduced the cracking tendency. It is concluded that the beneficial effect of increasing gypsum in reducing cracking tendency in slag concrete is only favourable if moist cured for 7 days.
- Publication type
- Journal article
- Materials and Structures, Vol. 41, no. 8 (Oct 2008), pp. 1393-1403
- Publication year
- FOR Code(s)
- 0905 Civil Engineering
- Autogenous shrinkages; Beneficial effects; Blended cements; Bone cement; Cement manufacture; Cements; Concrete construction; Concretes; Cracking; Cracking tendency; Curing; Curing conditions; Dewatering; Drying; Early ages; Gypsum; Gypsum content; Restrained shrinkage; Shrinkage; Slag concrete; Slags; Small reduction
- Publisher URL
- Copyright © 2007 RILEM.
- Peer reviewed