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Internal structure of compacted permeable friction course mixtures

Alvarez, Allex E. / Martin, Amy Epps / Estakhri, Cindy

AbstractDurability and functionality (i.e., noise reduction effectiveness and drainability) of permeable friction course (PFC) mixtures depend on the characteristics of the air voids (AV) contained in the mixture. This study analyzes the internal structure of PFC mixtures, assessed in terms of AV characteristics; determined using X-ray Computed Tomography and image analysis techniques. Corresponding results showed: (i) heterogeneous distributions of AV in the horizontal direction of both field-compacted mixtures (road cores) and specimens compacted using the Superpave Gyratory Compactor (SGC) and (ii) limitations to compare their vertical AV distributions. Recommendations to reduce the horizontal heterogeneity included using road cores with a minimum 152.4mm diameter and coring SGC specimens to 101.6mm in diameter. Implementation of field-compaction control and future analysis of mixtures prepared accordingly was recommended to determine the pattern of vertical AV distribution that should be reproduced in SGC specimens and corresponding modifications required for fabrication of these specimens.

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Internal structure of compacted permeable friction course mixtures

Alvarez, Allex E. / Martin, Amy Epps / Estakhri, Cindy

AbstractDurability and functionality (i.e., noise reduction effectiveness and drainability) of permeable friction course (PFC) mixtures depend on the characteristics of the air voids (AV) contained in the mixture. This study analyzes the internal structure of PFC mixtures, assessed in terms of AV characteristics; determined using X-ray Computed Tomography and image analysis techniques. Corresponding results showed: (i) heterogeneous distributions of AV in the horizontal direction of both field-compacted mixtures (road cores) and specimens compacted using the Superpave Gyratory Compactor (SGC) and (ii) limitations to compare their vertical AV distributions. Recommendations to reduce the horizontal heterogeneity included using road cores with a minimum 152.4mm diameter and coring SGC specimens to 101.6mm in diameter. Implementation of field-compaction control and future analysis of mixtures prepared accordingly was recommended to determine the pattern of vertical AV distribution that should be reproduced in SGC specimens and corresponding modifications required for fabrication of these specimens.

Internal structure of compacted permeable friction course mixtures

Alvarez, Allex E. / Martin, Amy Epps / Estakhri, Cindy

AbstractDurability and functionality (i.e., noise reduction effectiveness and drainability) of permeable friction course (PFC) mixtures depend on the characteristics of the air voids (AV) contained in the mixture. This study analyzes the internal structure of PFC mixtures, assessed in terms of AV characteristics; determined using X-ray Computed Tomography and image analysis techniques. Corresponding results showed: (i) heterogeneous distributions of AV in the horizontal direction of both field-compacted mixtures (road cores) and specimens compacted using the Superpave Gyratory Compactor (SGC) and (ii) limitations to compare their vertical AV distributions. Recommendations to reduce the horizontal heterogeneity included using road cores with a minimum 152.4mm diameter and coring SGC specimens to 101.6mm in diameter. Implementation of field-compaction control and future analysis of mixtures prepared accordingly was recommended to determine the pattern of vertical AV distribution that should be reproduced in SGC specimens and corresponding modifications required for fabrication of these specimens.

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Title:

Internal structure of compacted permeable friction course mixtures

Contributors:

Alvarez, Allex E. (author) / Martin, Amy Epps (author) / Estakhri, Cindy (author)

Published in:

Construction and Building Materials ; 24 ; 1027-1035

Publication date:

2009-11-18

Size:

9 pages

ISSN:

DOI:

https://doi.org/10.1016/j.conbuildmat.2009.11.015

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Permeable friction course , Open-graded friction course (OGFC) , X-ray Computed Tomography , Image analysis , Mixture internal structure , Air voids distribution , Air voids content

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