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<p>Preserving pavement from deterioration and rectifying defects caused by damage are crucial objectives of pavement maintenance. Slurry seal has gained significant attention and widespread use as an effective and efficient method for preventive pavement maintenance. The application of slurry seal delays pavement failure, seals surfaces, fills inactive road cracks, enhances skid resistance, and repairs pavement surfaces with a thickness of less than 2.5&#xa0;cm. Mixing and construction at 25&#xa0;°C saves energy and reduces greenhouse gas emissions. Raveling, exposure, and sanding are common distresses in this type of asphalt. In recent years, researchers have endeavored to surpass the specifications of regulations by enhancing the quality of certain materials, such as fillers, due to their filling properties and their impact on the adhesion performance between asphalt and aggregate. In this study, basalt filler was substituted for mineral filler in slurry seal protective asphalt at percentages of 0%, 25%, 50%, 75%, and 100%. Modified mixtures with basalt filler were evaluated and statistically assessed for performance and function according to ISSA A105 guidelines using XRF and FESEM microstructure tests, wet adhesion, abrasion, asphalt stripping, and load-induced deformation. The results demonstrated that basalt filler, due to its superior physical and appearance characteristics compared to mineral filler, enhances asphalt adhesion to aggregates, abrasion resistance, rutting resistance, and asphalt stripping resistance. In this regard, the highest adhesion value was related to samples containing 75% and 100% basalt waste powder and 8% residual bitumen, with values of 26.5 and 27&#xa0;kg/cm, respectively. Additionally, these samples showed a 36% and 36.7% improvement in vertical (rutting) and lateral displacement compared to the control sample. Samples containing 100% basalt filler in 8% residual bitumen had the least deformation. The weight loss due to abrasion in mixtures containing 75% and 100% basalt filler compared to the control sample decreased by 19% and 26.6%, respectively. A comprehensive statistical analysis identified the variables that had the greatest impact on the performance and durability of the slurry seal mixture. It was found that 100% replacement of basalt waste filler, instead of mineral filler, had a positive effect on the slurry seal mixture.</p>

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Optimizing slurry seal asphalt with basalt: an analysis of performance and durability

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Karrar Talib Khudhair Algburi,
  • Saeid Hesami

摘要

Preserving pavement from deterioration and rectifying defects caused by damage are crucial objectives of pavement maintenance. Slurry seal has gained significant attention and widespread use as an effective and efficient method for preventive pavement maintenance. The application of slurry seal delays pavement failure, seals surfaces, fills inactive road cracks, enhances skid resistance, and repairs pavement surfaces with a thickness of less than 2.5 cm. Mixing and construction at 25 °C saves energy and reduces greenhouse gas emissions. Raveling, exposure, and sanding are common distresses in this type of asphalt. In recent years, researchers have endeavored to surpass the specifications of regulations by enhancing the quality of certain materials, such as fillers, due to their filling properties and their impact on the adhesion performance between asphalt and aggregate. In this study, basalt filler was substituted for mineral filler in slurry seal protective asphalt at percentages of 0%, 25%, 50%, 75%, and 100%. Modified mixtures with basalt filler were evaluated and statistically assessed for performance and function according to ISSA A105 guidelines using XRF and FESEM microstructure tests, wet adhesion, abrasion, asphalt stripping, and load-induced deformation. The results demonstrated that basalt filler, due to its superior physical and appearance characteristics compared to mineral filler, enhances asphalt adhesion to aggregates, abrasion resistance, rutting resistance, and asphalt stripping resistance. In this regard, the highest adhesion value was related to samples containing 75% and 100% basalt waste powder and 8% residual bitumen, with values of 26.5 and 27 kg/cm, respectively. Additionally, these samples showed a 36% and 36.7% improvement in vertical (rutting) and lateral displacement compared to the control sample. Samples containing 100% basalt filler in 8% residual bitumen had the least deformation. The weight loss due to abrasion in mixtures containing 75% and 100% basalt filler compared to the control sample decreased by 19% and 26.6%, respectively. A comprehensive statistical analysis identified the variables that had the greatest impact on the performance and durability of the slurry seal mixture. It was found that 100% replacement of basalt waste filler, instead of mineral filler, had a positive effect on the slurry seal mixture.