Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios
Joint Authors
Feng, Yu
Qi, Jianan
Wang, Jingquan
Liu, Jiaping
Liu, Jianzhong
Source
Advances in Materials Science and Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-08
Country of Publication
Egypt
No. of Pages
14
Abstract EN
This paper presents an experimental study on the flexural behavior of an innovative CA-UHPC (ultrahigh-performance concrete containing coarse aggregate) slab with high and low reinforcement ratios.
A total of eighteen CA-UHPC slabs were tested to failure under the parameters of longitudinal reinforcement ratio, curing method, and maximum aggregate size.
Test results indicated that sufficient longitudinal reinforcement should be embedded to prevent the brittle failure and disastrous damage.
High ductile failure mode was observed for specimens with high reinforcement ratio compared with specimens with low reinforcement ratio.
Instead of extensively crushing as normal strength concrete, delamination failure appeared in the compression zone of the CA-UHPC slabs owing to the fibers’ bridging effect, the yielding of longitudinal reinforcement, and the large expansion of flexural cracks which led to the final failure.
The reinforced CA-UHPC slabs demonstrated excellent deformability, and ultimate ratio of deflection to span increased from 1/281 to 1/12 when the reinforcement ratio raised from 0% to 3.45%.
Stiffness of the reinforced specimens at the flexural cracking state was about 88% and only approximately 6% at the ultimate state, but nearly 50% of the initial stiffness remained when the longitudinal reinforcements yielded, which indicated superior load resistance ability and excellent postcracking deformability.
A new ductility index was proposed to evaluate the postcracking ductility of the CA-UHPC specimens.
Finally, test results were compared with the flexural strength predictions of CECS 38-2004, ACI 544.4R, and BS EN 1992.
American Psychological Association (APA)
Feng, Yu& Qi, Jianan& Wang, Jingquan& Liu, Jiaping& Liu, Jianzhong. 2019. Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios. Advances in Materials Science and Engineering،Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1120373
Modern Language Association (MLA)
Feng, Yu…[et al.]. Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios. Advances in Materials Science and Engineering No. 2019 (2019), pp.1-14.
https://search.emarefa.net/detail/BIM-1120373
American Medical Association (AMA)
Feng, Yu& Qi, Jianan& Wang, Jingquan& Liu, Jiaping& Liu, Jianzhong. Flexural Behavior of the Innovative CA-UHPC Slabs with High and Low Reinforcement Ratios. Advances in Materials Science and Engineering. 2019. Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1120373
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120373