Combined Influence of Expansive and Shrinkage Reducing Admixtures on the Shrinkage Behavior of Ultra-High Performance Concrete

Title
Combined Influence of Expansive and Shrinkage Reducing Admixtures on the Shrinkage Behavior of Ultra-High Performance Concrete
Author
류두열
Keywords
Expansive admixture; Restrained shrinkage; Shrinkage reducing agent; Ultra high performance concrete
Issue Date
2012-01
Publisher
TRANS TECH PUBLICATIONS
Citation
Key Engineering Materials, Vol.488-489, No.- [2012], p242-245
Abstract
Since ultra-high performance cementitious composite (UHPCC) exhibits remarkable compressive strength and ductility, its application for structural member provides significant reduction of the section. The use of low water-to-binder ratio and admixtures with high fineness induce large shrinkage strain, leading to the possibility of large occurrence of shrinkage cracks due to the restraints of the form and reinforcing bars. Therefore, this study admixes a combination of expansive and shrinkage reducing agents as a solution to reduce the shrinkage of UHPCC. The eventual appropriateness is computed to evaluate the free shrinkage and restrained shrinkage behaviors. From the test results, the admixing of a combination of expansive and shrinkage reducing agents is seen to achieve a reduction of the free shrinkage by 30% to 50% at 28 days and a reduction of the strain of the external steel by about 19%.
URI
https://www.scientific.net/KEM.488-489.242http://hdl.handle.net/20.500.11754/67940
ISSN
1013-9826
DOI
10.4028/www.scientific.net/KEM.488-489.242
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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