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<p>Coal ash, a byproduct of thermal power plants is produced in significant quantities worldwide. Improper disposal of it leads to environmental problems. Utilizing Coal Ash (CA) in asphalt pavements addresses this issue. In this research, Dense Bituminous Macadam (DBM) mixes of Indian Roads Congress (IRC) grading II mentioned in IRC:111-2009 were prepared using conventional stone coarse aggregates, coal bottom ash for fine aggregate replacement, coal fly ash as a filler material and Helix Steel Fiber (HSF) as a reinforcing additive. For the present laboratory work HSF was incorporated in different proportions such as 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25% and 1.50% by the mix’s weight, with different variations of HSF length such as 0 mm, 5 mm, 10 mm, 15 mm, 20 mm &amp; 25 mm. Marshall stability, static indirect tensile strength, moisture damage resistance in connection with Tensile Strength Ratio (TSR) &amp; retained stability tests were performed on the DBM mixes of IRC grading II to evaluate their performance. With the application of CA along with HSF in DBM mixes shows increment in Marshall properties, marginal improvement in resistance to moisture induced damage and increased retained stability values in comparison to the control mix i.e. DBM mixes without CA and HSF. Findings shows that the incorporation of CA in conjunction with HSF improves the Indirect Tensile Strength (ITS) of DBM specimens at all tested temperatures compared to the control mix. The combination of CA and HSF for DBM mixes improves the moisture resistance by enhancing adhesion &amp; matrix interlocking. As a result, adding CA along with HSF to DBM mixes can enhance the overall performance of asphalt pavement structures in conjunction with the environmental advantages and the process can be considered feasible as well as viable.</p>

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Effect of steel fiber and coal ash on the properties of dense bituminous macadam mixes of Indian Roads Congress grading II

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Sagar Kailas Sonawane,
  • Arun Kumar Dwivedi,
  • Premanand L. Naktode

摘要

Coal ash, a byproduct of thermal power plants is produced in significant quantities worldwide. Improper disposal of it leads to environmental problems. Utilizing Coal Ash (CA) in asphalt pavements addresses this issue. In this research, Dense Bituminous Macadam (DBM) mixes of Indian Roads Congress (IRC) grading II mentioned in IRC:111-2009 were prepared using conventional stone coarse aggregates, coal bottom ash for fine aggregate replacement, coal fly ash as a filler material and Helix Steel Fiber (HSF) as a reinforcing additive. For the present laboratory work HSF was incorporated in different proportions such as 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25% and 1.50% by the mix’s weight, with different variations of HSF length such as 0 mm, 5 mm, 10 mm, 15 mm, 20 mm & 25 mm. Marshall stability, static indirect tensile strength, moisture damage resistance in connection with Tensile Strength Ratio (TSR) & retained stability tests were performed on the DBM mixes of IRC grading II to evaluate their performance. With the application of CA along with HSF in DBM mixes shows increment in Marshall properties, marginal improvement in resistance to moisture induced damage and increased retained stability values in comparison to the control mix i.e. DBM mixes without CA and HSF. Findings shows that the incorporation of CA in conjunction with HSF improves the Indirect Tensile Strength (ITS) of DBM specimens at all tested temperatures compared to the control mix. The combination of CA and HSF for DBM mixes improves the moisture resistance by enhancing adhesion & matrix interlocking. As a result, adding CA along with HSF to DBM mixes can enhance the overall performance of asphalt pavement structures in conjunction with the environmental advantages and the process can be considered feasible as well as viable.