|Table of Contents|

Experimental Study on Bond Anchorage Performance Between Steel-polypropylene Hybrid Fiber Ceramsite Concrete and Reinforcement(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年06期
Page:
14-23
Research Field:
建筑材料
Publishing date:

Info

Title:
Experimental Study on Bond Anchorage Performance Between Steel-polypropylene Hybrid Fiber Ceramsite Concrete and Reinforcement
Author(s):
ZHU Hong-bing1; 2;  WANG Ye1;  YU Zhi-wu2;  XU Cheng-xiang1;  XU Wen-kang1
(1. School of Urban Construction, Wuhan University of Science and Technology, Hubei 430065, Wuhan, China; 2. National Engineering Laboratory for High Speed Railway Construction, Central South University, Changsha 410075, Hunan, China)
Keywords:
ceramsite concrete;  steel-polypropylene hybrid fiber;  deformed reinforcement;  bond anchorage performance;  central pull-out test
PACS:
TU377.1
DOI:
10.19815/j.jace.2021.08002
Abstract:
In order to study the bond and anchorage performance of steel-polypropylene hybrid fiber ceramsite concrete and deformed reinforcement, and overcome the defects of poor toughness of ceramsite concrete and poor bond performance with reinforcement, 16 groups of steel fiber and polypropylene fiber ceramsite concrete specimens with different hybrid ratios were subjected to central pull-out test, and the effects of hybrid fiber content on the bond failure mode between ceramsite concrete and reinforcement, bond strength and bond slip curve were obtained. The influence of hybrid fiber on bond slip was quantitatively evaluated by energy method. The critical anchorage length between steel-polypropylene hybrid fiber ceramsite concrete and reinforcement was calculated by the test data. The results show that the breaking form of steel-polypropylene hybrid fiber ceramsite concrete pull-out specimens is pull-out failure and the specimen has good ductility. The bond slip curve has a complete rising section and falling section. The mixing of steel fiber and polypropylene fiber can produce a positive hybrid effect on the bond strength. Steel fiber plays a leading role in the improvement of bond performance, followed by polypropylene fiber. The hybrid fiber can greatly increase the energy absorption value in the rising and falling sections of the bond slip curve, and significantly improve the bond toughness and deformation ability. The critical anchorage length of hybrid fiber ceramsite concrete can be reduced by 23% compared with that without fiber. Adding steel-polypropylene hybrid fiber can significantly improve the anchorage and bonding performance between ceramsite concrete and deformed reinforcement, improve the bond ductility and reduce the anchorage length of ceramsite concrete and deformed reinforcement.

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Last Update: 2022-12-20