Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete
Geopolymer Concrete (GPC) as a cement-less construction material has attracted worldwide attention due to its lower carbon footprint. There are numerous studies reported on GPC made using different by-products including fly-ash. However, since the use of bottom-ash is comparatively limited, making p...
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MDPI AG
2020-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/10/6/101 |
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| author | Peiman Azarsa Rishi Gupta |
| author_facet | Peiman Azarsa Rishi Gupta |
| author_sort | Peiman Azarsa |
| collection | DOAJ |
| description | Geopolymer Concrete (GPC) as a cement-less construction material has attracted worldwide attention due to its lower carbon footprint. There are numerous studies reported on GPC made using different by-products including fly-ash. However, since the use of bottom-ash is comparatively limited, making potassium-based GPC using this waste can be an alternative to Portland Cement Concrete (PCC). In this study, two methods of accelerated curing were used to determine the influence of elevated temperature on the compressive strength of GPC, composed of 50% bottom-ash and 50% fly-ash. GPC specimens were cured using various temperatures including ambient, 30 °C, 45 °C, 60 °C, and 80 °C for 24 h, all followed by 28 days of ambient curing. The highest compressive strength was obtained with steam curing at a temperature of 80 °C for a duration of 24 h. It is of great significance to evaluate elastic modulus of the concrete mixture so that the short-term rigidity of structures subjected to elongation, bending, or compression can be predicted. In this study, a longitudinal Resonant Frequency Test (RFT) as a non-destructive test (NDT) was used to calculate the elastic modulus of both GPC and a comparative PCC mix. Based on the results, PCC had higher resonant frequency (by about 1000 Hz) compared to GPC. A review of empirical models for predicting GPC’s elastic modulus showed that all of the predicted elastic modulus values were lower than experimental values. |
| first_indexed | 2024-03-10T19:28:50Z |
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| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T19:28:50Z |
| publishDate | 2020-05-01 |
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| spelling | doaj.art-933f9aff36c24a6489312d09a1a1501e2023-11-20T02:19:35ZengMDPI AGBuildings2075-53092020-05-0110610110.3390/buildings10060101Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer ConcretePeiman Azarsa0Rishi Gupta1Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaDepartment of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaGeopolymer Concrete (GPC) as a cement-less construction material has attracted worldwide attention due to its lower carbon footprint. There are numerous studies reported on GPC made using different by-products including fly-ash. However, since the use of bottom-ash is comparatively limited, making potassium-based GPC using this waste can be an alternative to Portland Cement Concrete (PCC). In this study, two methods of accelerated curing were used to determine the influence of elevated temperature on the compressive strength of GPC, composed of 50% bottom-ash and 50% fly-ash. GPC specimens were cured using various temperatures including ambient, 30 °C, 45 °C, 60 °C, and 80 °C for 24 h, all followed by 28 days of ambient curing. The highest compressive strength was obtained with steam curing at a temperature of 80 °C for a duration of 24 h. It is of great significance to evaluate elastic modulus of the concrete mixture so that the short-term rigidity of structures subjected to elongation, bending, or compression can be predicted. In this study, a longitudinal Resonant Frequency Test (RFT) as a non-destructive test (NDT) was used to calculate the elastic modulus of both GPC and a comparative PCC mix. Based on the results, PCC had higher resonant frequency (by about 1000 Hz) compared to GPC. A review of empirical models for predicting GPC’s elastic modulus showed that all of the predicted elastic modulus values were lower than experimental values.https://www.mdpi.com/2075-5309/10/6/101geopolymer concretecuring regimeresonant frequencyelastic moduluspredictive models |
| spellingShingle | Peiman Azarsa Rishi Gupta Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete Buildings geopolymer concrete curing regime resonant frequency elastic modulus predictive models |
| title | Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete |
| title_full | Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete |
| title_fullStr | Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete |
| title_full_unstemmed | Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete |
| title_short | Comparative Study Involving Effect of Curing Regime on Elastic Modulus of Geopolymer Concrete |
| title_sort | comparative study involving effect of curing regime on elastic modulus of geopolymer concrete |
| topic | geopolymer concrete curing regime resonant frequency elastic modulus predictive models |
| url | https://www.mdpi.com/2075-5309/10/6/101 |
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