DOIONLINE

DOIONLINE NO - IJAMCE-IRAJ-DOIONLNE-6908

Publish In
International Journal of Advances in Mechanical and Civil Engineering (IJAMCE)-IJAMCE
Journal Home
Volume Issue
Issue
Volume-4,Issue-1  ( Feb, 2017 )
Paper Title
Influence of Silica Fume on the Rheological Properties and Autogenous Shrinkage of UHPC Paste
Author Name
Caglar Yalcinkaya, Halit Yazici
Affilition
Dokuz Eylül University, Department of Civil Engineering, Turkey
Pages
39-43
Abstract
High amount of cementitious material and low water/binder (W/B) ratio increase shrinkage strain which also increases the crack formation risk of ultra-high performance concrete (UHPC). The effects of silica fume replacement ratio on the rheological properties and autogenous shrinkage of UHPC paste were investigated in this study. Four pastes with a very low W/B ratio (0.20) were produced. Besides the rheometer with a ball measuring system, mini slump-flow and V-funnel tests were applied to determine rheological properties. Moreover, autogenous shrinkage was measured by using a laser system at early-age, whereas a mechanical comparator was used for long-term measurements. As a result, the pastes which have SF up to 20% showed dilatant behavior. It was found that early-age shrinkage is much higher than long-term shrinkage. Both early-age and total autogenous deformation was increased as a result of SF replacement. The long-term and total deformations were significantly increased as a result of increasing SF replacement from 20% to 30%. Index Terms- Rheology, Shrinkage, Silica Fume, UHPC.
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