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Interfacial behavior between normal substrate and green ultra‐high‐performance fiber‐reinforced concrete under elevated temperatures
Author(s) -
Abo Sabah Saddam H.,
Zainal Nur L.,
Muhamad Bunnori Norazura,
Megat Johari Megat A.,
Hassan Mohd H.
Publication year - 2019
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201900152
Subject(s) - materials science , composite material , substrate (aquarium) , composite number , flexural strength , grinding , ultimate tensile strength , durability , bonding strength , bond strength , layer (electronics) , adhesive , oceanography , geology
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.