Experimental study on shrinkage of blast Furnace slag cement pastes

Title: Experimental study on shrinkage of blast Furnace slag cement pastes
Author(s): Q. Song, D. Xu, X. Hou
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 925 - 931
Total Pages: 7
Nb references: 8
Language: English

Abstract: This research was carried out to understand the relationship between shrinkage characteristic and microstructure of blast furnace slag cement. Cement pastes and mortars incorporating ground granulated blast furnace slag (GGBS) at three levels of fineness and four levels replacement was produced and cured at 20±2°C and 50±4% relative humidity(RH).
Shrinkage of mortars and pastes, non-evaporable water content, calcium hydroxide(CH) content and pore structure were measured. The results indicated that the shrinkage of both cement paste and mortar replaced by GGBS could be effectively restrained except when the slag powder fineness was 605m2/kg. For blast furnace slag cements, shrinkage of pastes linearly increased with the non-evaporable water content. Porosity and volume fraction of big pore in the cement pastes were decreased and volume fraction of small pores was well correlated with drying shrinkage. The fact that CH was corroded by GGBS may be a reason for reducing shrinkage.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00