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Effects of Asphalt Mixture Properties on Permanent Deformation Response

Diaz Vásquez, Luis Guillermo; Archilla, Adrian (Sage PublishingEstados Unidos, 2011)

The hot-mix asphalt (HMA) rutting prediction model in the Mechanistic–Empirical Pavement Design Guide (MEPDG) uses a relationship that includes the effects of mix characteristics only through the resilient strain, which ...
Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests

Archilla, Adrian; Carpenter, Samuel; Diaz Vásquez, Luis Guillermo (American Society of Civil Engineers - ASCEEstados Unidos, 2007)

Researchers report the number of cycles corresponding to the lower strain rate in a permanent deformation test, known as flow number (FN), as a good asphalt mix stability indicator; however, its variability has limited its ...

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Effects of Asphalt Mixture Properties on Permanent Deformation Response
...
Diaz Vásquez, Luis Guillermo | 2011

The hot-mix asphalt (HMA) rutting prediction model in the Mechanistic–Empirical Pavement Design Guide (MEPDG) uses a relationship that includes the effects of mix characteristics only through the resilient strain, which in turn is a function of the dynamic modulus |E*| of the mix. However, increasing evidence suggests that the use of |E*| alone may be insufficient to characterize completely the permanent deformation behavior of HMA. In addition to effects already considered by the MEPDG model with |E*|, the effects of mix characteristics on permanent deformation are analyzed with the use of the results of repetitive axial permanent deformation tests from laboratory-compacted HMA specimens. Results of multiple linear regression analysis indicate that binder type, effective binder content, and air void content have significant effects on model parameters for permanent deformation. The potential effects of mix characteristics on these parameters are analyzed with the use of the MEPDG model and an HMA pavement section with four levels of compaction. Scenarios in which the mixture characteristics are incorporated solely by means of |E*| are compared with scenarios in which the effects of air void content and asphalt content are incorporated into the rutting prediction model by adjusting its parameters according to relationships established in the laboratory. Empirical laboratory evidence supports the hypotheses that, regardless of mixture properties, universal values for permanent deformation model parameters do not fully account for mixture-specific contributions to rutting and that other mix characteristics (e.g., air void content) may be needed to supplement |E*| for the appropriate characterization of the permanent deformation of asphalt mixtures.

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Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests
...
Archilla, Adrian | 2007

Researchers report the number of cycles corresponding to the lower strain rate in a permanent deformation test, known as flow number (FN), as a good asphalt mix stability indicator; however, its variability has limited its implementation. Current procedures for calculating FN rely on data smoothing techniques, which can yield very different values for the same specimen if different moving average periods are used. A new methodology for determining FN is proposed by modeling the permanent strain versus load cycles curve as a continuous function. Data from cold-mix replicate samples were analyzed and compared, and a substantial reduction in FN variability was observed using the proposed methodology. Use of FN to select the data to determine the power model parameters was also evaluated. Results indicate that establishing FN as the upper cut-off point of the data used to fit the power-model produces a slight reduction in parameter estimates variability. Adopting the proposed model could be useful for permanent deformation characterization and as a unifying criterion for selecting the data used for that purpose.

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Listar AN - Grupo de Investigación en Geotecnia por autor "bcbeef10a035db28ccf204fc0726bda4"

Effects of Asphalt Mixture Properties on Permanent Deformation Response

Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests

Envíos recientes

Effects of Asphalt Mixture Properties on Permanent Deformation Response

Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests

Listar AN - Grupo de Investigación en Geotecnia por autor "bcbeef10a035db28ccf204fc0726bda4"

Effects of Asphalt Mixture Properties on Permanent Deformation Response ﻿

Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests ﻿

Envíos recientes

Effects of Asphalt Mixture Properties on Permanent Deformation Response

Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests

Effects of Asphalt Mixture Properties on Permanent Deformation Response

Proposed Method to Determine the Flow Number in Bituminous Mixtures from Repeated Axial Load Tests