Long term bending behavior of ultra-high performance concrete (UHPC) beams
Unlike normal concrete (NC) the behavior of ultra-high performance concrete (UHPC) is different under long-term efforts, if we refer to creep, shrinkage or long-term deflections. It is well known that UHPC has special properties, like compressive strength higher than 150 MPa and tensile strength hig...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
National R&D Institute URBAN-INCERC, INCERC Bucharest Branch
2015-12-01
|
| Series: | Constructii: Journal of Civil Engineering Research |
| Subjects: | |
| Online Access: | http://constructii.incd.ro/Archive/2015-2/Constructii_2015_Vol.16_No.2_ID2015160206_Barbos.pdf |
| Summary: | Unlike normal concrete (NC) the behavior of ultra-high performance concrete (UHPC) is different under long-term efforts, if we refer to creep, shrinkage or long-term deflections. It is well known that UHPC has special properties, like compressive strength higher than 150 MPa and tensile strength higher than 20 MPa - in case of UHPC reinforced with steel-fibers. Nevertheless, UHPC behavior is not completely elucidated in what concerns creep straining or serviceability behavior in case of structural elements. Some studies made on UHPC samples shown that creep is significantly reduced if the concrete is subjected to heat treatment and if it contains steel-fiber reinforcement. Relating thereto, it is important to know how does structural elements made of this type of concrete works in service life under long-term loadings. The results obtained on UHPC samples, regarding creep straining from tension or compression efforts may not be generalized in case of structural elements (e.g. beams, slabs, columns) subjected to bending. By performing this study, it was aimed to understand the influence of heat treatment and steel-fiber addition on the rheological phenomena of UHPC bended beams. |
|---|---|
| ISSN: | 1221-2709 2247-0328 |