Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete
To address the strength deficiencies and enhance the durability of coal gangue pervious concrete while promoting the resource utilization of coal gangue, this study employs alkali-activated fly ash and slag as binding materials, partially replacing natural coarse aggregates with coal gangue to prepa...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524011124 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846169403647852544 |
|---|---|
| author | Jielian Li Wenhua Zha Wenfang Lv Tao Xu Bin Wang Bingwen Wang |
| author_facet | Jielian Li Wenhua Zha Wenfang Lv Tao Xu Bin Wang Bingwen Wang |
| author_sort | Jielian Li |
| collection | DOAJ |
| description | To address the strength deficiencies and enhance the durability of coal gangue pervious concrete while promoting the resource utilization of coal gangue, this study employs alkali-activated fly ash and slag as binding materials, partially replacing natural coarse aggregates with coal gangue to prepare alkali-activated fly ash-slag-based coal gangue pervious concrete (AFSGPC). Basalt fibers are introduced to examine the effects of varying fiber lengths and volume fractions on the mechanical properties, permeability, and sulfate resistance of AFSGPC. Results indicate that incorporating an appropriate amount of basalt fibers improves the mechanical properties and sulfate resistance of AFSGPC, attributed to the high strength characteristics of the alkali-activated fly ash-slag binder and the crack-bridging and toughening effects of the basalt fibers, although it may slightly reduce permeability. When the fiber length is 12 mm and the volume fraction is 0.1 %, the compressive strength at 28 days reaches 24.12 MPa, and the splitting tensile strength is 2.95 MPa, reflecting increases of 10.48 % and 32.89 %, respectively. The permeability coefficient is measured at 2.07 mm/s, meeting the standards for pervious concrete in road applications. After undergoing 60 cycles of sulfate wet-dry erosion, the corrosion resistance coefficient of AFSGPC increases by 20.02 %. To meet the stringent strength requirements for pervious pavements, it is recommended that basalt fibers with a length of 12 mm and a volume fraction of 0.1 % be utilized in AFSGPC. In regions characterized by high precipitation, the application of basalt fibers shorter than 12 mm, with a volume fraction not exceeding 0.15 %, is advisable to minimize the obstruction of interconnected pores. These findings provide valuable insights for the preparation and engineering application of basalt fiber-modified AFSGPC. |
| format | Article |
| id | doaj-art-3edb23b9c71b43f8b6fb9a6b7ea022aa |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-3edb23b9c71b43f8b6fb9a6b7ea022aa2024-11-13T04:29:45ZengElsevierCase Studies in Construction Materials2214-50952024-12-0121e03961Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concreteJielian Li0Wenhua Zha1Wenfang Lv2Tao Xu3Bin Wang4Bingwen Wang5School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China; Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province, Nanchang 330013, ChinaSchool of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China; Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province, Nanchang 330013, China; Corresponding author at: School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China.School of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China; Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province, Nanchang 330013, ChinaSchool of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China; Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province, Nanchang 330013, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaSchool of Civil and Architecture Engineering, East China University of Technology, Nanchang 330013, China; Engineering Research Center for Geological Environment and Underground Space of Jiangxi Province, Nanchang 330013, ChinaTo address the strength deficiencies and enhance the durability of coal gangue pervious concrete while promoting the resource utilization of coal gangue, this study employs alkali-activated fly ash and slag as binding materials, partially replacing natural coarse aggregates with coal gangue to prepare alkali-activated fly ash-slag-based coal gangue pervious concrete (AFSGPC). Basalt fibers are introduced to examine the effects of varying fiber lengths and volume fractions on the mechanical properties, permeability, and sulfate resistance of AFSGPC. Results indicate that incorporating an appropriate amount of basalt fibers improves the mechanical properties and sulfate resistance of AFSGPC, attributed to the high strength characteristics of the alkali-activated fly ash-slag binder and the crack-bridging and toughening effects of the basalt fibers, although it may slightly reduce permeability. When the fiber length is 12 mm and the volume fraction is 0.1 %, the compressive strength at 28 days reaches 24.12 MPa, and the splitting tensile strength is 2.95 MPa, reflecting increases of 10.48 % and 32.89 %, respectively. The permeability coefficient is measured at 2.07 mm/s, meeting the standards for pervious concrete in road applications. After undergoing 60 cycles of sulfate wet-dry erosion, the corrosion resistance coefficient of AFSGPC increases by 20.02 %. To meet the stringent strength requirements for pervious pavements, it is recommended that basalt fibers with a length of 12 mm and a volume fraction of 0.1 % be utilized in AFSGPC. In regions characterized by high precipitation, the application of basalt fibers shorter than 12 mm, with a volume fraction not exceeding 0.15 %, is advisable to minimize the obstruction of interconnected pores. These findings provide valuable insights for the preparation and engineering application of basalt fiber-modified AFSGPC.http://www.sciencedirect.com/science/article/pii/S2214509524011124Coal ganguePervious concreteAlkali-activated cementitious materialsBasalt fibersSulfate resistance |
| spellingShingle | Jielian Li Wenhua Zha Wenfang Lv Tao Xu Bin Wang Bingwen Wang Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete Case Studies in Construction Materials Coal gangue Pervious concrete Alkali-activated cementitious materials Basalt fibers Sulfate resistance |
| title | Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete |
| title_full | Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete |
| title_fullStr | Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete |
| title_full_unstemmed | Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete |
| title_short | Mechanical properties and sulfate resistance of basalt fiber-reinforced alkali-activated fly ash-slag-based coal gangue pervious concrete |
| title_sort | mechanical properties and sulfate resistance of basalt fiber reinforced alkali activated fly ash slag based coal gangue pervious concrete |
| topic | Coal gangue Pervious concrete Alkali-activated cementitious materials Basalt fibers Sulfate resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524011124 |
| work_keys_str_mv | AT jielianli mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete AT wenhuazha mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete AT wenfanglv mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete AT taoxu mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete AT binwang mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete AT bingwenwang mechanicalpropertiesandsulfateresistanceofbasaltfiberreinforcedalkaliactivatedflyashslagbasedcoalgangueperviousconcrete |