Pullout behaviour of ribbed bars in self-compacting concrete with steel fibers
| Autor: | Nelly Majain, Roslli Noor Mohamed, Azlan Adnan, Ahmad Baharuddin Abdul Rahman |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Bar (music) Embedment 02 engineering and technology Test method 021001 nanoscience & nanotechnology 01 natural sciences Aspect ratio (image) Stress (mechanics) 0103 physical sciences Ultimate tensile strength Composite material 0210 nano-technology Failure mode and effects analysis |
| Zdroj: | Materials Today: Proceedings. 39:1034-1040 |
| ISSN: | 2214-7853 |
| Popis: | This research mainly focuses on the pullout behaviour of different ribbed bars size embedded in plain Self-Compacting Concrete (SCC) and also in SCC with Steel Fibers (SCCSF). The diameter of the ribbed bars was 12, 16 and 20 mm. The steel fibers used in this study were the hooked end type with 35 mm length and an aspect ratio of 63.6. This study attempts to investigate factors influencing the pullout behaviour by using the embedment length recommended by RILEM RC6 Part 2 which is 5 times the bar diameter using the direct pullout test method. A total of 9 specimens with a dimension of 200 mm cube were prepared and tested. It was found that the proposed embedment length was large for 12 and 20 mm diameter bars but fitting for bond stress investigation with the 16 mm diameter bar. The addition of steel fibers in SCC improves the compressive and tensile strengths of SCCSF and provides concrete confinement that enhances the bond between ribbed bars and the surrounding concrete. Besides, the presence of steel fibers also changes the failure mode of SCCSF specimens especially with 20 mm diameter rebars in which the failure mode changes from premature splitting to pullout. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect