GEOTECHNICAL CHARACTERIZATION OF SOIL-GRADED AGGREGATE MIXTURES FOR USE IN THE BASE COURSE OF ROAD PAVEMENTS IN ACCORDANCE WITH DNIT STANDARD 141/2022 – ES
This study evaluates the geotechnical performance of a soil classified as coarse sand and its mixture with 20% crushed stone for use in the base layer of road pavement. Tests were conducted for particle size analysis, liquidity and plasticity limits, Los Angeles abrasion, and California Bearing Ratio, in accordance with standards from the National Department of Transportation Infrastructure. The natural soil exhibited a liquidity limit of 14.1%, a plasticity index of 5.7%, a CBR of 15.52%, and an expansion of 0.04%, failing to meet the minimum strength requirement for a base course. The crushed stone exhibited an abrasion loss of 36.2%, a value below the maximum regulatory limit. The soil-gravel mixture exhibited a CBR of 78.07% and a swelling of 0.4%, meeting the criteria of standard DNIT 141/2022 – ES. The results indicate that the addition of gravel improves the particle size distribution and increases the material’s mechanical strength, making it suitable for use in base layers of flexible pavements.
GEOTECHNICAL CHARACTERIZATION OF SOIL-GRADED AGGREGATE MIXTURES FOR USE IN THE BASE COURSE OF ROAD PAVEMENTS IN ACCORDANCE WITH DNIT STANDARD 141/2022 – ES
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DOI: https://doi.org/10.22533/at.ed.13176426270313
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Palavras-chave: soil; crushed stone; paving; CBR; road base.
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Keywords: soil; crushed stone; paving; CBR; road base.
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Abstract:
This study evaluates the geotechnical performance of a soil classified as coarse sand and its mixture with 20% crushed stone for use in the base layer of road pavement. Tests were conducted for particle size analysis, liquidity and plasticity limits, Los Angeles abrasion, and California Bearing Ratio, in accordance with standards from the National Department of Transportation Infrastructure. The natural soil exhibited a liquidity limit of 14.1%, a plasticity index of 5.7%, a CBR of 15.52%, and an expansion of 0.04%, failing to meet the minimum strength requirement for a base course. The crushed stone exhibited an abrasion loss of 36.2%, a value below the maximum regulatory limit. The soil-gravel mixture exhibited a CBR of 78.07% and a swelling of 0.4%, meeting the criteria of standard DNIT 141/2022 – ES. The results indicate that the addition of gravel improves the particle size distribution and increases the material’s mechanical strength, making it suitable for use in base layers of flexible pavements.
- Thiago Santos Chaves
- Luzana Leite Brasileiro
