Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate
The effects of using recycled concrete aggregate (RCA) as coarse aggregate on the equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete were investigated in this paper. High-calcium fly ash (HFA) and commercial silica fume (SF) were used as the precursors...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522001140 |
| _version_ | 1818549107249119232 |
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| author | Nattapong Damrongwiriyanupap Todsaporn Srikhamma Chittinat Plongkrathok Tanakorn Phoo-ngernkham Worathep Sae-Long Sakonwan Hanjitsuwan Piti Sukontasukkul Long-yuan Li Prinya Chindaprasirt |
| author_facet | Nattapong Damrongwiriyanupap Todsaporn Srikhamma Chittinat Plongkrathok Tanakorn Phoo-ngernkham Worathep Sae-Long Sakonwan Hanjitsuwan Piti Sukontasukkul Long-yuan Li Prinya Chindaprasirt |
| author_sort | Nattapong Damrongwiriyanupap |
| collection | DOAJ |
| description | The effects of using recycled concrete aggregate (RCA) as coarse aggregate on the equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete were investigated in this paper. High-calcium fly ash (HFA) and commercial silica fume (SF) were used as the precursors for producing the alkali-activated high-calcium fly ash concrete (AAHFAC). Sodium hydroxide (SH) and sodium silicate (SS) solutions were used as alkaline activator solutions with the constant SS/SH ratio of 1.0 and liquid-binder (L/B) ratio of 0.50. The natural coarse aggregate (NCA) used in this study was crushed limestone and replaced with RCA at the rates of 0%, 20%, 40%, 60%, 80%, and 100% by volume. The setting time, compressive strength, elastic modulus, Poisson’s ratio, and bond strength obtained by pull-out tests of AAHFAC and Portland cement concrete (NC) were investigated. Experimental results showed that the use of RCA to replace NCA resulted in reducing the setting time of concrete. Also, the setting time of the AAHFAC with and without SF were shorter than that of NC mixes for all of RCA replacement level. The use of RCA had a positive effect on the mechanical properties of alkali-activated binder; however, they declined at NC mixes. Therefore, the use of RCA in alkali-activated binder concrete is an excellent alternative for sustainable concrete since it allows for the substitution of natural resource components while somehow producing low CO2 emissions. |
| first_indexed | 2024-12-12T08:29:06Z |
| format | Article |
| id | doaj.art-f761439a9ce54636bdd14cd3e5a8204c |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-12T08:29:06Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-f761439a9ce54636bdd14cd3e5a8204c2022-12-22T00:31:09ZengElsevierCase Studies in Construction Materials2214-50952022-06-0116e00982Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregateNattapong Damrongwiriyanupap0Todsaporn Srikhamma1Chittinat Plongkrathok2Tanakorn Phoo-ngernkham3Worathep Sae-Long4Sakonwan Hanjitsuwan5Piti Sukontasukkul6Long-yuan Li7Prinya Chindaprasirt8Department of Civil Engineering, School of Engineering, University of Phayao, Phayao 56000, ThailandSustainable Construction Material Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, ThailandSustainable Construction Material Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, ThailandSustainable Construction Material Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand; Corresponding author.Department of Civil Engineering, School of Engineering, University of Phayao, Phayao 56000, ThailandProgram of Civil Technology, Faculty of Industrial Technology, Lampang Rajabhat University, Lampang 52100, ThailandConstruction and Building Materials Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut’s University of Technology-North Bangkok, Bangkok 10800, ThailandSchool of Engineering, Faculty of Science and Engineering, Plymouth University, PL4 8AA, United KingdomSustainable Infrastructure Research and Development Center, Dept. of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand; Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300, ThailandThe effects of using recycled concrete aggregate (RCA) as coarse aggregate on the equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete were investigated in this paper. High-calcium fly ash (HFA) and commercial silica fume (SF) were used as the precursors for producing the alkali-activated high-calcium fly ash concrete (AAHFAC). Sodium hydroxide (SH) and sodium silicate (SS) solutions were used as alkaline activator solutions with the constant SS/SH ratio of 1.0 and liquid-binder (L/B) ratio of 0.50. The natural coarse aggregate (NCA) used in this study was crushed limestone and replaced with RCA at the rates of 0%, 20%, 40%, 60%, 80%, and 100% by volume. The setting time, compressive strength, elastic modulus, Poisson’s ratio, and bond strength obtained by pull-out tests of AAHFAC and Portland cement concrete (NC) were investigated. Experimental results showed that the use of RCA to replace NCA resulted in reducing the setting time of concrete. Also, the setting time of the AAHFAC with and without SF were shorter than that of NC mixes for all of RCA replacement level. The use of RCA had a positive effect on the mechanical properties of alkali-activated binder; however, they declined at NC mixes. Therefore, the use of RCA in alkali-activated binder concrete is an excellent alternative for sustainable concrete since it allows for the substitution of natural resource components while somehow producing low CO2 emissions.http://www.sciencedirect.com/science/article/pii/S2214509522001140Sustainable alkali-activated concreteEquivalent substrate stiffnessMechanical propertiesRecycled concrete aggregateLife-cycle assessment |
| spellingShingle | Nattapong Damrongwiriyanupap Todsaporn Srikhamma Chittinat Plongkrathok Tanakorn Phoo-ngernkham Worathep Sae-Long Sakonwan Hanjitsuwan Piti Sukontasukkul Long-yuan Li Prinya Chindaprasirt Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate Case Studies in Construction Materials Sustainable alkali-activated concrete Equivalent substrate stiffness Mechanical properties Recycled concrete aggregate Life-cycle assessment |
| title | Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate |
| title_full | Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate |
| title_fullStr | Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate |
| title_full_unstemmed | Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate |
| title_short | Assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali-activated concrete containing recycled concrete aggregate |
| title_sort | assessment of equivalent substrate stiffness and mechanical properties of sustainable alkali activated concrete containing recycled concrete aggregate |
| topic | Sustainable alkali-activated concrete Equivalent substrate stiffness Mechanical properties Recycled concrete aggregate Life-cycle assessment |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522001140 |
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