TY - JOUR
T1 - Residual mechanical properties of fire exposed GFRP reinforcement in concrete elements
AU - Gooranorimi, O.
AU - Claure, G.
AU - De Caso, F.
AU - Suaris, W.
AU - Nanni, A.
N1 - Funding Information:
The authors gratefully acknowledge the National Science Foundation (NSF) and its industrial members for the support provided to the Industry/University Center for Integration of Composites into Infrastructure (CICI) at the University of Miami under grant NSF IIP-1439543.
PY - 2016
Y1 - 2016
N2 - Technologies developed over the last two decades have facilitated the use of glass fiber reinforced polymer (GFRP) composites as internal reinforcement bars (rebars) for concrete structures; providing an alternative to steel reinforcement due to significant advantages such as magnetic transparency and most importantly, corrosion resistance leading to a sustainable and durable solution for the built infrastructure. Composites reduce the long-term maintenance costs over the lifetime of a structure, especially in reinforced concrete (RC) elements in corrosive environments such as coastal constructions. However, this technology has not been embraced in buildings due to concerns regarding fire resistance of RC-GFRP elements, where bond-to-concrete concerns are raised due to different available surface enhancement solutions in GFRP rebars. In order to accelerate the integration of sustainable construction materials in RC buildings, the residual strength of fire exposed RC-GFRP slabs is studied. To this end, RC-GFRP slabs with two significantly different surface features, namely deformed lugs comparable to steel rebar and sand coated, were exposed to a combined fire and sustained three-point bending service load for two hours. Upon completion of the test, the residual slab strength was tested by conducting a static test. GFRP bars were then extracted from the concrete evaluate the residual mechanical properties including shear strength, glass transition temperature, and visual analysis using Scanning Electron Microscopy (SEM). Overall the results for both types of rebars showed that the GFRP-RC slabs did not lose structural integrity after the fire. Additionally, fire exposed GFRP rebars showed equivalent properties to unexposed rebars. The results may provide necessary information to accelerate the integration of this sustainable technology into the built infrastructure.
AB - Technologies developed over the last two decades have facilitated the use of glass fiber reinforced polymer (GFRP) composites as internal reinforcement bars (rebars) for concrete structures; providing an alternative to steel reinforcement due to significant advantages such as magnetic transparency and most importantly, corrosion resistance leading to a sustainable and durable solution for the built infrastructure. Composites reduce the long-term maintenance costs over the lifetime of a structure, especially in reinforced concrete (RC) elements in corrosive environments such as coastal constructions. However, this technology has not been embraced in buildings due to concerns regarding fire resistance of RC-GFRP elements, where bond-to-concrete concerns are raised due to different available surface enhancement solutions in GFRP rebars. In order to accelerate the integration of sustainable construction materials in RC buildings, the residual strength of fire exposed RC-GFRP slabs is studied. To this end, RC-GFRP slabs with two significantly different surface features, namely deformed lugs comparable to steel rebar and sand coated, were exposed to a combined fire and sustained three-point bending service load for two hours. Upon completion of the test, the residual slab strength was tested by conducting a static test. GFRP bars were then extracted from the concrete evaluate the residual mechanical properties including shear strength, glass transition temperature, and visual analysis using Scanning Electron Microscopy (SEM). Overall the results for both types of rebars showed that the GFRP-RC slabs did not lose structural integrity after the fire. Additionally, fire exposed GFRP rebars showed equivalent properties to unexposed rebars. The results may provide necessary information to accelerate the integration of this sustainable technology into the built infrastructure.
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M3 - Conference article
AN - SCOPUS:85049786380
VL - 2016-August
JO - Sustainable Construction Materials and Technologies
JF - Sustainable Construction Materials and Technologies
SN - 2515-3048
T2 - 4th International Conference on Sustainable Construction Materials and Technologies, SCMT 2016
Y2 - 7 August 2016 through 11 August 2016
ER -