An Investigation Into Geopolymer Adhesive as a Viable Sustainable Material for Nsm Strengthening of Rc Beams in Shear
Year: 2025
Type: article
Abstract: This paper aims to investigate the performance of geopolymer adhesive (GPA) as a substitute for epoxy in the near-surface-mounted (NSM) technique to enhance the shear strength of reinforced concrete (RC) beams. Seven RC beams of 1200 mm in length, 120 mm in width, and 160 mm in height were tested under three-point loading. The specimens involved one control beam and six strengthened beams. This paper investigates several parameters, namely the types of paste adhesive (epoxy or geopolymer), spacing of NSM bars (80 and 65 mm), and inclined NSM bars (90° and 45°). The initial crack opening load, ultimate load-carrying capacity, deflection, and crack pattern. According to the results, the epoxy adhesive can increase load capacity by up to 96.36%. Geopolymer adhesive yielded a maximum of 68.62% compared to un-strengthened RC beams. The first crack load on strengthened specimens was increased by up to 18% compared to un-strengthened RC beams
Source: Kufa Journal of Engineering
Authors: Dhiyaa J. Kadhim, Ali K. Al-Asadi
Institution: Thi Qar University
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
Funder: University of Thi-Qar
OpenAlex ID: W4415768122