Interfacial behavior between normal substrate and green ultra‐high‐performance fiber‐reinforced concrete under elevated temperatures
Document Type
Article
Publication Date
1-1-2019
Abstract
This study assesses the effects of elevated temperatures (100, 200, 300, 400, and 500°C) on the bonding behavior of normal concrete (NC) substrate as old concrete and the new Green Universiti Sains Malaysia Reinforced Concrete (GUSMRC) as a repair material through slant shear, pull-off, splitting tensile, and flexural tests. Sandblasting (SB) and grinding (GR) surface treatments were employed to enhance the bond strength of the NC/GUSMRC composite. The research also evaluates the mechanical characteristics of the GUSMRC mix which 50% of its content is ultrafine palm oil fuel ash prior to and after the exposure to elevated temperatures. The results showed degradation in the mechanical properties of the monolithic GUSMRC and the bonding strength of the NC/GUSMRC composite after exposure to elevated temperatures; however, the bonding quality is excellent. Moreover, the SB surface treatment enhanced the interfacial bonding more than the GR surface treatment before and after elevated temperature exposure. © 2019 fib. International Federation for Structural Concrete
Keywords
bonding strength, cementitious composite, elevated temperature, pull-off test, slant shear test, ultra-high-performance fiber-reinforced concrete
Divisions
fac_eng
Funders
Ministry of Higher Education, Malaysia and Universiti Sains Malaysia for providing financial support through the Fundamental Research Grant Scheme (203/PAWAM/6071365) and RUI grant (1001/PAWAM/814215)
Publication Title
Structural Concrete
Volume
20
Issue
6
Publisher
Wiley