Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures
Semi-Flexible Asphalt (SFA) mixture is a wearing course in which Open-Graded Asphalt (OGA) mixes having air voids of 20–35% are grouted with cement mortar. The grout consists of cement, sand, superplasticizer, and water. In the present work, an effort was made to assess the effect of the Sand-Cement...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523002048 |
| _version_ | 1827920421859622912 |
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| author | Doma Hemanth Kumar Raghuram K. Chinnabhandar Kondeti Chiranjeevi A.U. Ravi Shankar |
| author_facet | Doma Hemanth Kumar Raghuram K. Chinnabhandar Kondeti Chiranjeevi A.U. Ravi Shankar |
| author_sort | Doma Hemanth Kumar |
| collection | DOAJ |
| description | Semi-Flexible Asphalt (SFA) mixture is a wearing course in which Open-Graded Asphalt (OGA) mixes having air voids of 20–35% are grouted with cement mortar. The grout consists of cement, sand, superplasticizer, and water. In the present work, an effort was made to assess the effect of the Sand-Cement (S/C) ratio in determining the optimal grout proportions. Taguchi technique combined with Grey Relational Analysis was used to obtain the optimal grout proportion. The optimum grout was found to be the mixture prepared with an S/C ratio of 0.6, a water-to-cement (W/C) ratio of 0.40, and a polycarboxylic ether-based superplasticizer (SP) content of 0.75% by weight of cement. The SP content was the most influencing factor, while the S/C ratio was the second most influencing factor. To investigate the effect of aggregate gradation and bitumen type on the mechanical properties of SFA mixtures, a new aggregate gradation with neat and modified bitumen was used to prepare OGA mixtures and later grouted with optimal grout proportion. The Marshall Stability, compressive strength, Indirect Tensile Strength, Cantabro loss, fatigue resistance, moisture and Oil spillage resistance tests were conducted. The results showed that the SFA mixtures prepared with polymer-modified bitumen and the new aggregate gradation have better mechanical properties, implying the significance of bitumen type and aggregate gradation. |
| first_indexed | 2024-03-13T04:11:23Z |
| format | Article |
| id | doaj.art-543fa365016a4e3eb3c714aaf86b1888 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:11:23Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-543fa365016a4e3eb3c714aaf86b18882023-06-21T06:54:11ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02025Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixturesDoma Hemanth Kumar0Raghuram K. Chinnabhandar1Kondeti Chiranjeevi2A.U. Ravi Shankar3Research Scholar, Department of Civil Engineering, National Institute of Technology Karnataka, Mangalore 575025, IndiaAssistant Professor, Department of Civil Engineering, J.N.N College of Engineering, Shivamogga, Karnataka 577204, IndiaResearch Scholar, Department of Civil Engineering, National Institute of Technology Karnataka, Mangalore 575025, IndiaProfessor, Department of Civil Engineering, National Institute of Technology Karnataka, Mangalore 575025, India; Corresponding author.Semi-Flexible Asphalt (SFA) mixture is a wearing course in which Open-Graded Asphalt (OGA) mixes having air voids of 20–35% are grouted with cement mortar. The grout consists of cement, sand, superplasticizer, and water. In the present work, an effort was made to assess the effect of the Sand-Cement (S/C) ratio in determining the optimal grout proportions. Taguchi technique combined with Grey Relational Analysis was used to obtain the optimal grout proportion. The optimum grout was found to be the mixture prepared with an S/C ratio of 0.6, a water-to-cement (W/C) ratio of 0.40, and a polycarboxylic ether-based superplasticizer (SP) content of 0.75% by weight of cement. The SP content was the most influencing factor, while the S/C ratio was the second most influencing factor. To investigate the effect of aggregate gradation and bitumen type on the mechanical properties of SFA mixtures, a new aggregate gradation with neat and modified bitumen was used to prepare OGA mixtures and later grouted with optimal grout proportion. The Marshall Stability, compressive strength, Indirect Tensile Strength, Cantabro loss, fatigue resistance, moisture and Oil spillage resistance tests were conducted. The results showed that the SFA mixtures prepared with polymer-modified bitumen and the new aggregate gradation have better mechanical properties, implying the significance of bitumen type and aggregate gradation.http://www.sciencedirect.com/science/article/pii/S2214509523002048Semi-flexible pavementSand-cement ratioTaguchi methodologyGrey relational analysisAggregate gradationBitumen type |
| spellingShingle | Doma Hemanth Kumar Raghuram K. Chinnabhandar Kondeti Chiranjeevi A.U. Ravi Shankar Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures Case Studies in Construction Materials Semi-flexible pavement Sand-cement ratio Taguchi methodology Grey relational analysis Aggregate gradation Bitumen type |
| title | Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures |
| title_full | Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures |
| title_fullStr | Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures |
| title_full_unstemmed | Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures |
| title_short | Effect of aggregate gradation and bitumen type on mechanical properties of semi-flexible asphalt mixtures |
| title_sort | effect of aggregate gradation and bitumen type on mechanical properties of semi flexible asphalt mixtures |
| topic | Semi-flexible pavement Sand-cement ratio Taguchi methodology Grey relational analysis Aggregate gradation Bitumen type |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523002048 |
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