Behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns with glass fiber‐reinforced polymer cages

Abstract

In this study, the behavior of axially loaded plain and fiber‐reinforced geopolymer concrete columns reinforced with glass fiber‐reinforced polymer (GFRP) bars and helices was investigated. Ten ambient‐cured geopolymer concrete columns of 160 mm diameter and 640 mm height were cast and tested under concentric axial loads. The behavior of the columns was investigated under the effect of the type of reinforcement (steel vs. GFRP), pitch of the GFRP helices (40, 75, 100 mm), and addition of nonmetallic fibers, that is, glass fiber and polypropylene fiber. It was found that GFRP bar reinforced geopolymer concrete column achieved less axial load, confinement efficiency, and ductility compared to the geopolymer concrete column reinforced with the same amount of the steel reinforcement. Overall, the reduction in the pitch of the GFRP helices enhanced the confinement efficiency, post‐peak behavior, and ductility of the plain and fiber‐reinforced geopolymer concrete columns. Also, the addition of fibers significantly improved the ductility of the GFRP bar reinforced geopolymer concrete columns.

Mechanical properties and life cycle assessment of sugarcane bagasse and corn cob ashes‐based geopolymer concrete to promote circular economy

“…[1][2][3] However, Ordinary Portland cement (OPC), which is an important ingredient in concrete is responsible for high energy consumption and release of carbon dioxide (CO 2 ) resulting from the calcination of limestone during its production. 4,5 Cement production alone accounts for 8 to 10% of global anthropogenic (caused by human activities) CO 2 emissions. 6,7 The World Business Council for Sustainable Development (WBCSD) expects direct carbon emissions from the cement industry to increase by 4% by 2050.…”

“…Concrete is the most widely used building material and the second most abundant material on earth after water 1–3 . However, Ordinary Portland cement (OPC), which is an important ingredient in concrete is responsible for high energy consumption and release of carbon dioxide (CO 2 ) resulting from the calcination of limestone during its production 4,5 . Cement production alone accounts for 8 to 10% of global anthropogenic (caused by human activities) CO 2 emissions 6,7 .…”

Numerical analysis of square concrete‐filled double‐skin tubular columns with outer stainless‐steel tube

“…Traditional reinforced concrete has been a foundation of civil engineering for many decades. The developments on reinforced concrete have led to new types of composite structure, including the reinforced concrete with fiber‐reinforced polymer (FRP) composites 1 or the concrete‐filled steel tubular (CFST) structure 2 . The CFST structures have been adopted widely in practice due to their high performance 2–4 .…”

Experimental investigation on the use of glass fiber reinforced polymer reinforcement in hollow‐core circular concrete columns

“…environment, is a major concern for the use of steel bars in RC structures in such a harsh environment. [6][7][8] The corrosion of steel bars can lead to structural distress with the loss of the cross-sectional area of steel bars together with the loss of bond between steel bars and surrounding concrete. 9,10 Also, the strength and ductility of RC structures decrease due to the corrosion of steel bars.…”

“…The corrosion of steel bars in RC structures exposed to the corrosive environment, that is, the marine environment, is a major concern for the use of steel bars in RC structures in such a harsh environment 6–8 . The corrosion of steel bars can lead to structural distress with the loss of the cross‐sectional area of steel bars together with the loss of bond between steel bars and surrounding concrete 9,10 .…”