Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution
The purpose of this study was to evaluate the mechanical properties of concrete specimens produced with recycled aggregate (RA) from construction demolition waste (CDW) based on alkaline activated slag-fly ash (AASF). The recycled aggregate concrete mixtures (RAC) were designed using DMDA method, wi...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Developments in the Built Environment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165923000078 |
| _version_ | 1797820613704810496 |
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| author | Duy-Hai Vo Khanh-Dung Tran Thi Chao-Lung Hwang Min-Chih Liao Wei-Liang Hsu Mitiku Damtie Yehualaw |
| author_facet | Duy-Hai Vo Khanh-Dung Tran Thi Chao-Lung Hwang Min-Chih Liao Wei-Liang Hsu Mitiku Damtie Yehualaw |
| author_sort | Duy-Hai Vo |
| collection | DOAJ |
| description | The purpose of this study was to evaluate the mechanical properties of concrete specimens produced with recycled aggregate (RA) from construction demolition waste (CDW) based on alkaline activated slag-fly ash (AASF). The recycled aggregate concrete mixtures (RAC) were designed using DMDA method, with RA used as a 30%, 40%, and 50% partial replacement for natural aggregate (Category 1) and with Na2O doses of 4%–8% and modulus ratios of 0.6–1.4 (Ms = SiO2/Na2O; Category 2). The results showed that the inclusion of RA negatively affected the mechanical properties of RAC specimens, with recycled coarse aggregate exhibiting less of a negative effect than recycled fine aggregate. The concrete mixtures exhibited mechanical strength values of 20.7–35.9 MPa and UPV values of 3692–4200 m/s at 28 days of curing age. Concrete characteristics were significantly better in the mixtures produced using higher alkaline concentrations than in those produced using lower alkaline concentrations. |
| first_indexed | 2024-03-13T09:40:52Z |
| format | Article |
| id | doaj.art-c849732b7f6642cb8ffbe328d3db579b |
| institution | Directory Open Access Journal |
| issn | 2666-1659 |
| language | English |
| last_indexed | 2024-03-13T09:40:52Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj.art-c849732b7f6642cb8ffbe328d3db579b2023-05-25T04:25:08ZengElsevierDevelopments in the Built Environment2666-16592023-04-0114100125Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solutionDuy-Hai Vo0Khanh-Dung Tran Thi1Chao-Lung Hwang2Min-Chih Liao3Wei-Liang Hsu4Mitiku Damtie Yehualaw5Department of Civil Engineering, University of Technology and Education, The University of Danang, 48 Cao Thang Street, Hai Chau District, Danang City, Viet Nam; Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei, 10607, Taiwan, ROCDepartment of Civil and Construction Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei, 10607, Taiwan, ROCTaiwan Building Technology Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei, 10607, Taiwan, ROCDepartment of Civil and Construction Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei, 10607, Taiwan, ROC; Corresponding author.Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei, 10607, Taiwan, ROCFaculty of Civil and Water Resource Engineering, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, EthiopiaThe purpose of this study was to evaluate the mechanical properties of concrete specimens produced with recycled aggregate (RA) from construction demolition waste (CDW) based on alkaline activated slag-fly ash (AASF). The recycled aggregate concrete mixtures (RAC) were designed using DMDA method, with RA used as a 30%, 40%, and 50% partial replacement for natural aggregate (Category 1) and with Na2O doses of 4%–8% and modulus ratios of 0.6–1.4 (Ms = SiO2/Na2O; Category 2). The results showed that the inclusion of RA negatively affected the mechanical properties of RAC specimens, with recycled coarse aggregate exhibiting less of a negative effect than recycled fine aggregate. The concrete mixtures exhibited mechanical strength values of 20.7–35.9 MPa and UPV values of 3692–4200 m/s at 28 days of curing age. Concrete characteristics were significantly better in the mixtures produced using higher alkaline concentrations than in those produced using lower alkaline concentrations.http://www.sciencedirect.com/science/article/pii/S2666165923000078alkali-Activated slag-fly ashRecycled aggregate concreteCompressive strengthDMDA |
| spellingShingle | Duy-Hai Vo Khanh-Dung Tran Thi Chao-Lung Hwang Min-Chih Liao Wei-Liang Hsu Mitiku Damtie Yehualaw Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution Developments in the Built Environment alkali-Activated slag-fly ash Recycled aggregate concrete Compressive strength DMDA |
| title | Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution |
| title_full | Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution |
| title_fullStr | Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution |
| title_full_unstemmed | Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution |
| title_short | Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution |
| title_sort | mechanical properties of concrete produced with alkali activated slag fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm dmda method effects of recycled aggregate content and alkaline solution |
| topic | alkali-Activated slag-fly ash Recycled aggregate concrete Compressive strength DMDA |
| url | http://www.sciencedirect.com/science/article/pii/S2666165923000078 |
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