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Effects of mineral admixtures on cracking tendency and shrinkage of HPC at early ages



Title: Effects of mineral admixtures on cracking tendency and shrinkage of HPC at early ages
Author(s): X. Gao, H. Ba, Y. Yang
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 292 - 298
Total Pages: 7
Nb references: 5
Language: English


Abstract: 
The investigation was mainly carried out to study the effects of replacement percentage of silica fume (SF) and finely ground fly ash (FGFA) on the cracking tendency of high-performance concrete (HPC) at early ages. In addition, the free shrinkages of every concrete under drying condition and sealed condition were measured. All the mixtures had the same water-binder ratio (w/b=0.32) and the same dosage of binder at 520 kg per cubic meter concrete. Experimental results demonstrated that the silica fume mixtures crack earlier than the control mixture and their final cracking are more serious, but the fly ash mixtures crack later and their final cracking are less serious. At the same time, the total shrinkage of concrete under drying condition increases with the increasing dosage of silica fume, but decreases with the more fly ash being used in mixtures.


Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00