Shear Behavior of Geopolymer Concrete Slender Beams
This study investigates the shear behavior of slender steel-reinforced geopolymer concrete (GPC) beams with the shear span to effective depth ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi&g...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/5/1191 |
| _version_ | 1797600775978876928 |
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| author | Muhammad Tauqir Asad Ullah Qazi Qasim S. Khan Muhammad Junaid Munir Syed Minhaj Saleem Kazmi |
| author_facet | Muhammad Tauqir Asad Ullah Qazi Qasim S. Khan Muhammad Junaid Munir Syed Minhaj Saleem Kazmi |
| author_sort | Muhammad Tauqir |
| collection | DOAJ |
| description | This study investigates the shear behavior of slender steel-reinforced geopolymer concrete (GPC) beams with the shear span to effective depth ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula>) of 4.5 and 5.0. To investigate the effect of shear reinforcement, two ordinary Portland cement concrete (OPC) beams and two GPC beams without shear reinforcement, and two OPC beams and two GPC beams reinforced with shear stirrups were cast. All beams were 150 mm wide and 225 mm deep with lengths of 1770 mm (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi><mo>=</mo><mn>4.5</mn></mrow></semantics></math></inline-formula>) and 1950 mm (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi><mo>=</mo><mn>5</mn></mrow></semantics></math></inline-formula>). The beams were tested under a three-point bending test. The experimental results showed that OPC and GPC beams without and with shear reinforcements exhibited similar crack propagation and failure mechanism. The midspan deflections of GPC beams were greater than OPC beams. The normalized shear resistance of OPC and GPC beams with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio 4.5 was greater than 4% and 30%, respectively, than beams with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio 5. OPC beams showed a greater decrease in shear resistance with an increasing <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio compared to GPC beams. The shear resistances computed using empirical relationships available in various OPC design codes including AC1-318-14, AC1-318-19, fib-10 and JSCE-07 underestimated the experimental shear resistance of both OPC and GPC beams. In addition, the environmental assessment of OPC and GPC beams exhibited that GPC beams emit about 34% lower embodied CO<sub>2</sub> emissions than OPC beams. |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-11T03:52:42Z |
| publishDate | 2023-04-01 |
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| series | Buildings |
| spelling | doaj.art-6453793e1b0849ff90563305f8259ebb2023-11-18T00:44:50ZengMDPI AGBuildings2075-53092023-04-01135119110.3390/buildings13051191Shear Behavior of Geopolymer Concrete Slender BeamsMuhammad Tauqir0Asad Ullah Qazi1Qasim S. Khan2Muhammad Junaid Munir3Syed Minhaj Saleem Kazmi4Civil Engineering Department, University of Engineering and Technology, Lahore 54890, Punjab, PakistanCivil Engineering Department, University of Engineering and Technology, Lahore 54890, Punjab, PakistanCivil Engineering Department, University of Engineering and Technology, Lahore 54890, Punjab, PakistanSchool of Engineering, RMIT University, 376-392 Swanston Street, Melbourne, VIC 3001, AustraliaSchool of Engineering, RMIT University, 376-392 Swanston Street, Melbourne, VIC 3001, AustraliaThis study investigates the shear behavior of slender steel-reinforced geopolymer concrete (GPC) beams with the shear span to effective depth ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula>) of 4.5 and 5.0. To investigate the effect of shear reinforcement, two ordinary Portland cement concrete (OPC) beams and two GPC beams without shear reinforcement, and two OPC beams and two GPC beams reinforced with shear stirrups were cast. All beams were 150 mm wide and 225 mm deep with lengths of 1770 mm (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi><mo>=</mo><mn>4.5</mn></mrow></semantics></math></inline-formula>) and 1950 mm (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi><mo>=</mo><mn>5</mn></mrow></semantics></math></inline-formula>). The beams were tested under a three-point bending test. The experimental results showed that OPC and GPC beams without and with shear reinforcements exhibited similar crack propagation and failure mechanism. The midspan deflections of GPC beams were greater than OPC beams. The normalized shear resistance of OPC and GPC beams with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio 4.5 was greater than 4% and 30%, respectively, than beams with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio 5. OPC beams showed a greater decrease in shear resistance with an increasing <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>a</mi><mo>/</mo><mi>d</mi></mrow></semantics></math></inline-formula> ratio compared to GPC beams. The shear resistances computed using empirical relationships available in various OPC design codes including AC1-318-14, AC1-318-19, fib-10 and JSCE-07 underestimated the experimental shear resistance of both OPC and GPC beams. In addition, the environmental assessment of OPC and GPC beams exhibited that GPC beams emit about 34% lower embodied CO<sub>2</sub> emissions than OPC beams.https://www.mdpi.com/2075-5309/13/5/1191geopolymer concreteshear behaviorshear spanslender beamsestimated shear resistance |
| spellingShingle | Muhammad Tauqir Asad Ullah Qazi Qasim S. Khan Muhammad Junaid Munir Syed Minhaj Saleem Kazmi Shear Behavior of Geopolymer Concrete Slender Beams Buildings geopolymer concrete shear behavior shear span slender beams estimated shear resistance |
| title | Shear Behavior of Geopolymer Concrete Slender Beams |
| title_full | Shear Behavior of Geopolymer Concrete Slender Beams |
| title_fullStr | Shear Behavior of Geopolymer Concrete Slender Beams |
| title_full_unstemmed | Shear Behavior of Geopolymer Concrete Slender Beams |
| title_short | Shear Behavior of Geopolymer Concrete Slender Beams |
| title_sort | shear behavior of geopolymer concrete slender beams |
| topic | geopolymer concrete shear behavior shear span slender beams estimated shear resistance |
| url | https://www.mdpi.com/2075-5309/13/5/1191 |
| work_keys_str_mv | AT muhammadtauqir shearbehaviorofgeopolymerconcreteslenderbeams AT asadullahqazi shearbehaviorofgeopolymerconcreteslenderbeams AT qasimskhan shearbehaviorofgeopolymerconcreteslenderbeams AT muhammadjunaidmunir shearbehaviorofgeopolymerconcreteslenderbeams AT syedminhajsaleemkazmi shearbehaviorofgeopolymerconcreteslenderbeams |