Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete
In this paper, the utilization of recycled asphaltic concrete aggregate (RACA) in high calcium fly ash geopolymer concrete (HFGC) was explored. Coarse limestone aggregate was replaced with RACA at 0, 20, and 40 %by weight of the aggregate. The 10 M NaOH (NH), sodium silicate (NS), NH/NS ratio of 1.0...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-12-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509521001303 |
| _version_ | 1818717099555553280 |
|---|---|
| author | Athika Wongkvanklom Patcharapol Posi Apichit Kampala Traitot Kaewngao Prinya Chindaprasirt |
| author_facet | Athika Wongkvanklom Patcharapol Posi Apichit Kampala Traitot Kaewngao Prinya Chindaprasirt |
| author_sort | Athika Wongkvanklom |
| collection | DOAJ |
| description | In this paper, the utilization of recycled asphaltic concrete aggregate (RACA) in high calcium fly ash geopolymer concrete (HFGC) was explored. Coarse limestone aggregate was replaced with RACA at 0, 20, and 40 %by weight of the aggregate. The 10 M NaOH (NH), sodium silicate (NS), NH/NS ratio of 1.0, liquid alkaline/ash ratios of 0.45, 0.55, 0.65 and 0.75 were used to make geopolymer concrete cured at 25 °C. Test results indicated that the compressive strength decreased with the increase in RACA content as expected. However, the surface abrasion and sulfuric acid resistances were improved due to the presence of the adhered asphalt and the associated reduction in porosity and water absorption of the HFGC. The other benefit is the reduction in thermal conductivity due to the intrinsic low thermal conductivity of asphalt and RACA. The RACA could thus be beneficially utilized to improve the performance of geopolymer concrete with slight reduction in compressive strength but enhanced surface abrasion and sulfuric acid resistances. |
| first_indexed | 2024-12-17T19:29:46Z |
| format | Article |
| id | doaj.art-e6f3f60bc56d4f5a865d749def64e7c3 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-17T19:29:46Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-e6f3f60bc56d4f5a865d749def64e7c32022-12-21T21:35:17ZengElsevierCase Studies in Construction Materials2214-50952021-12-0115e00615Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concreteAthika Wongkvanklom0Patcharapol Posi1Apichit Kampala2Traitot Kaewngao3Prinya Chindaprasirt4Department of Civil and Environmental Engineering, Faculty of Science and Engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon, 47000, ThailandDepartment of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Isan, Khon Kaen Campus, Khon Kaen, 40000, Thailand; Corresponding author.Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Isan, Khon Kaen Campus, Khon Kaen, 40000, ThailandDepartment of Mechanical Engineering, Faculty of Science in Technical Education, Rajamangala University of Technology Isan Khon Kaen Campus, Khon Kaen, 40000, ThailandSustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand; Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, 10300, ThailandIn this paper, the utilization of recycled asphaltic concrete aggregate (RACA) in high calcium fly ash geopolymer concrete (HFGC) was explored. Coarse limestone aggregate was replaced with RACA at 0, 20, and 40 %by weight of the aggregate. The 10 M NaOH (NH), sodium silicate (NS), NH/NS ratio of 1.0, liquid alkaline/ash ratios of 0.45, 0.55, 0.65 and 0.75 were used to make geopolymer concrete cured at 25 °C. Test results indicated that the compressive strength decreased with the increase in RACA content as expected. However, the surface abrasion and sulfuric acid resistances were improved due to the presence of the adhered asphalt and the associated reduction in porosity and water absorption of the HFGC. The other benefit is the reduction in thermal conductivity due to the intrinsic low thermal conductivity of asphalt and RACA. The RACA could thus be beneficially utilized to improve the performance of geopolymer concrete with slight reduction in compressive strength but enhanced surface abrasion and sulfuric acid resistances.http://www.sciencedirect.com/science/article/pii/S2214509521001303Geopolymer concreteHigh calcium fly ashRecycled asphaltic concreteAmbient temperature curing |
| spellingShingle | Athika Wongkvanklom Patcharapol Posi Apichit Kampala Traitot Kaewngao Prinya Chindaprasirt Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete Case Studies in Construction Materials Geopolymer concrete High calcium fly ash Recycled asphaltic concrete Ambient temperature curing |
| title | Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| title_full | Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| title_fullStr | Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| title_full_unstemmed | Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| title_short | Beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| title_sort | beneficial utilization of recycled asphaltic concrete aggregate in high calcium fly ash geopolymer concrete |
| topic | Geopolymer concrete High calcium fly ash Recycled asphaltic concrete Ambient temperature curing |
| url | http://www.sciencedirect.com/science/article/pii/S2214509521001303 |
| work_keys_str_mv | AT athikawongkvanklom beneficialutilizationofrecycledasphalticconcreteaggregateinhighcalciumflyashgeopolymerconcrete AT patcharapolposi beneficialutilizationofrecycledasphalticconcreteaggregateinhighcalciumflyashgeopolymerconcrete AT apichitkampala beneficialutilizationofrecycledasphalticconcreteaggregateinhighcalciumflyashgeopolymerconcrete AT traitotkaewngao beneficialutilizationofrecycledasphalticconcreteaggregateinhighcalciumflyashgeopolymerconcrete AT prinyachindaprasirt beneficialutilizationofrecycledasphalticconcreteaggregateinhighcalciumflyashgeopolymerconcrete |