Bonding Behaviour of Reinforcement in Alkali Activated Slag-Fly ash Mortar

Author(s): Tsung-Han Wu, Ta-Peng Chang, Jeng-Ywan Shih, Tzong-Ruey Yang, Hoang-Anh Nguyen
Paper category: Proceedings
Book title: 1st International Conference on UHPC Materials and Structures
Editor(s): Caijun Shi and Dehui Wang
ISBN: 978-2-35158-164-3
e-ISBN: 978-2-35158-165-O
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 169-173
Total Pages: 05
Language: English

Abstract: Both the Portland cement (PC) and the no-cement alkali-activated slag-fly ash material (AAM) were used as the cementitious binders to cast 150u150u150 mm3 cubic mortar specimen for pull-out bonding test of reinforcement with two different diameters of reinforcement (I = 13 mm and 16 mm) and two different embedment lengths (75 mm, 150 mm). The research results show, at the same w/cm of 0.45, that the alkali activated slag-fly ash mortar with 3 % activator
had the compressive strength of 31.82 MPa and the bonding strength of 8.69 MPa, which were lower than those of 39.59 MPa and 12.38 MPa for Portland cement mortar by 19.6% and 29.8%, respectively. When the embedded length of reinforcement is 75 mm, all the specimens fail in pullout type, but when the embedded length becomes 150 mm, the mode of failure is decided by diameter of reinforcement. Both the PC and AAM mortars show the similar values of normalized bonding stress ratio between 0.2 and 0.3.

Online publication: 2016
Publication type : full_text
Public price (Euros): 0.00