Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete
Studies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This stu...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-04-01
|
| Series: | Frontiers in Materials |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fmats.2020.00090/full |
| _version_ | 1811328730327416832 |
|---|---|
| author | Yih Chen Khern Suvash Chandra Paul Suvash Chandra Paul Sih Ying Kong Adewumi John Babafemi Vivi Anggraini Md Jihad Miah Branko Šavija |
| author_facet | Yih Chen Khern Suvash Chandra Paul Suvash Chandra Paul Sih Ying Kong Adewumi John Babafemi Vivi Anggraini Md Jihad Miah Branko Šavija |
| author_sort | Yih Chen Khern |
| collection | DOAJ |
| description | Studies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This study investigates the effect of the surface treatment of waste tire rubber as coarse aggregates with different oxidizing solutions and different treatment durations on the mechanical, durability and thermal properties of concrete. The properties of concrete incorporated with 8% rubber coarse aggregates (by volume of natural aggregates) which were treated with three different solutions: water (H2O), 20% sodium hydroxide (NaOH) and 5% calcium hypochlorite [Ca(ClO)2] (both as% weight of water) for durations of 2, 24, and 72 h, respectively. The effect of these treatments on the compressive strength, splitting tensile strength, water permeability, thermal conductivity and diffusivity of concrete was investigated. Results show that Ca(ClO)2 has a more positive effect on the strength and permeability compared to NaOH solution and water. Experimental results were statistically analyzed using ANOVA and Post Hoc tests. The analyses showed that the improvement of concrete strength is only significant when the treatment with NaOH and Ca(ClO)2 is prolonged to 72 h. Furthermore, the microstructural analysis of concrete showed that the improvement in the strength is due to the improved bonding between cement paste and rubber aggregates as a result of surface treatment. This microstructural improvement also resulted in lower water permeability of concrete. However, the thermal conductivity and diffusivity increased when the surface treatment duration increases as there are less air voids in the samples. This study shows that, with appropriate pretreatment, a certain percentage of natural aggregates can be safely replaced with waste tire rubber aggregates while maintaining sufficient quality of the resulting concrete. |
| first_indexed | 2024-04-13T15:31:07Z |
| format | Article |
| id | doaj.art-93aa84e4021b4fdd8c61e12392fca45a |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-13T15:31:07Z |
| publishDate | 2020-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-93aa84e4021b4fdd8c61e12392fca45a2022-12-22T02:41:23ZengFrontiers Media S.A.Frontiers in Materials2296-80162020-04-01710.3389/fmats.2020.00090524430Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of ConcreteYih Chen Khern0Suvash Chandra Paul1Suvash Chandra Paul2Sih Ying Kong3Adewumi John Babafemi4Vivi Anggraini5Md Jihad Miah6Branko Šavija7Discipline of Civil Engineering, Monash University Malaysia, Subang Jaya, MalaysiaDiscipline of Civil Engineering, Monash University Malaysia, Subang Jaya, MalaysiaDepartment of Civil Engineering, International University of Business Agriculture and Technology, Dhaka, BangladeshDiscipline of Civil Engineering, Monash University Malaysia, Subang Jaya, MalaysiaDepartment of Civil Engineering, Stellenbosch University, Stellenbosch, South AfricaDiscipline of Civil Engineering, Monash University Malaysia, Subang Jaya, MalaysiaDepartment of Civil Engineering, University of Asia Pacific, Dhaka, BangladeshMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, NetherlandsStudies have shown that the incorporation of waste tire rubber aggregates reduces the strength, increases permeability and decrease thermal conductivity of concrete. However, only a few studies have investigated the effect of surface-modified rubber aggregates on the properties of concrete. This study investigates the effect of the surface treatment of waste tire rubber as coarse aggregates with different oxidizing solutions and different treatment durations on the mechanical, durability and thermal properties of concrete. The properties of concrete incorporated with 8% rubber coarse aggregates (by volume of natural aggregates) which were treated with three different solutions: water (H2O), 20% sodium hydroxide (NaOH) and 5% calcium hypochlorite [Ca(ClO)2] (both as% weight of water) for durations of 2, 24, and 72 h, respectively. The effect of these treatments on the compressive strength, splitting tensile strength, water permeability, thermal conductivity and diffusivity of concrete was investigated. Results show that Ca(ClO)2 has a more positive effect on the strength and permeability compared to NaOH solution and water. Experimental results were statistically analyzed using ANOVA and Post Hoc tests. The analyses showed that the improvement of concrete strength is only significant when the treatment with NaOH and Ca(ClO)2 is prolonged to 72 h. Furthermore, the microstructural analysis of concrete showed that the improvement in the strength is due to the improved bonding between cement paste and rubber aggregates as a result of surface treatment. This microstructural improvement also resulted in lower water permeability of concrete. However, the thermal conductivity and diffusivity increased when the surface treatment duration increases as there are less air voids in the samples. This study shows that, with appropriate pretreatment, a certain percentage of natural aggregates can be safely replaced with waste tire rubber aggregates while maintaining sufficient quality of the resulting concrete.https://www.frontiersin.org/article/10.3389/fmats.2020.00090/fullwaste rubbermechanical strengthwater permeabilitythermal conductivityANOVA |
| spellingShingle | Yih Chen Khern Suvash Chandra Paul Suvash Chandra Paul Sih Ying Kong Adewumi John Babafemi Vivi Anggraini Md Jihad Miah Branko Šavija Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete Frontiers in Materials waste rubber mechanical strength water permeability thermal conductivity ANOVA |
| title | Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete |
| title_full | Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete |
| title_fullStr | Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete |
| title_full_unstemmed | Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete |
| title_short | Impact of Chemically Treated Waste Rubber Tire Aggregates on Mechanical, Durability and Thermal Properties of Concrete |
| title_sort | impact of chemically treated waste rubber tire aggregates on mechanical durability and thermal properties of concrete |
| topic | waste rubber mechanical strength water permeability thermal conductivity ANOVA |
| url | https://www.frontiersin.org/article/10.3389/fmats.2020.00090/full |
| work_keys_str_mv | AT yihchenkhern impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT suvashchandrapaul impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT suvashchandrapaul impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT sihyingkong impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT adewumijohnbabafemi impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT vivianggraini impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT mdjihadmiah impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete AT brankosavija impactofchemicallytreatedwasterubbertireaggregatesonmechanicaldurabilityandthermalpropertiesofconcrete |