Characterization of unbound and stabilized granular materials using field strains in low volume roads

González, Ana Marta; Chamorro, Alondra; Barrios, Iván Domingo González; Osorio, Aleli

doi:10.1016/j.conbuildmat.2018.04.223

Cited by 18 publications

(2 citation statements)

References 30 publications

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“…Based on these results, Hilbrich suggested the use of a seismic modulus test as a potential alternative to the resilient modulus test, given the lower cost and more repeatable results. Gonzalez et al, reported that resilient moduli obtained from laboratory tests were approximately three-times lower than the field modulus ( 24 ). When using these low laboratory-determined strains in a model that related the granular material vertical elastic strain and the number of load repetitions with the surface plastic deformation or rutting, the material performance was underestimated, which could lead to overdesign.…”

Section: Study Approachmentioning

confidence: 99%

Development of an Improved Test Setup for Measuring the Resilient Modulus of Stabilized Pavement Materials

Louw

Hammack

et al. 2019

Transportation Research Record

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In a recent study to develop mechanistic empirical relationships for full depth reclamation (FDR) in California, it was determined that the commonly used triaxial testing setup detailed in American Association of State Highway and Transportation Officials (AASHTO) T 307 was not suitable for testing stabilized materials. This paper investigates different testing setups, based on a comprehensive literature review, to determine an appropriate approach for measuring strains on both laboratory-compacted and field-cored specimens. Five different test setups were evaluated, ranging from measurements on the top cap of the triaxial cell, to third-point measurements on the specimen. This study also investigated methods of mounting transducer gauge points on the specimen in a repeatable and accurate manner, and for preparing the specimen ends to mitigate point loads. Two field cores, one sampled from an FDR project with cement stabilization (FDR-PC) and the other from an FDR project with foamed asphalt stabilization (FDR-FA), were subjected to unconfined, low stress cyclic triaxial testing using different deviatoric and seating stresses using each of the five test setups. The effects of non-linear strain distribution on the cyclic stress strain curves were compared. Based on these results, the recommended test setup for determining the resilient modulus of the stabilized material is the third point on-specimen setup for measuring strain. This approach was minimally influenced by the non-linear strain distribution, and provided resilient moduli that closely correlated with stiffnesses back calculated from the falling weight deflectometer deflections measured close to the core locations.

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Section: Study Approachmentioning

confidence: 99%

Development of an Improved Test Setup for Measuring the Resilient Modulus of Stabilized Pavement Materials

Louw

Hammack

et al. 2019

Transportation Research Record

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“…Several in situ nondestructive testing procedures for pavement are available. The main principle consists of applying a load of known value to the pavement and analyzing the direction and size of the induced deformation 10 . The most common deformation is in the vertical direction 11 – 13 .…”

Section: Introductionmentioning

confidence: 99%

Assessment of pavement deflection under vehicle loads using a 3D-DIC system in the field

Núñez-Temes

Bastos

Arza-García

et al. 2022

Sci Rep

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This study aims to introduce the use of 3D-digital image correlation (DIC) to the in situ testing of pavements and to support the development of techniques for a rapid evaluation of the conservation status of existing roads. Little research was found on this topic. The passage of a car wheel on an asphalt pavement was adopted as a case study. The DIC measurements were compared to those gathered by contact sensors. From a qualitative point of view, the DIC measurements captured the realistic shape of a deflection basin. From a quantitative point of view, the deflection values provided by the DIC system had a mean error of 0.015 mm and a standard deviation of 0.011 mm. At the moment of highest load, these errors had a mean value and standard deviation of − 0.016 mm and 0.021 mm, respectively. Thus, to improve the accuracy of the system, we propose modifying the camera support, speckle pattern, and control of natural light.

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A Comprehensive Investigation of Pavement Evaluation Through Field and Laboratory and Prioritization

Muddasani,

Adepu,

Molugaram

2023

Recent Advances in Traffic Engineering

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Characterization of unbound and stabilized granular materials using field strains in low volume roads

Cited by 18 publications

References 30 publications

Development of an Improved Test Setup for Measuring the Resilient Modulus of Stabilized Pavement Materials

Development of an Improved Test Setup for Measuring the Resilient Modulus of Stabilized Pavement Materials

Assessment of pavement deflection under vehicle loads using a 3D-DIC system in the field

A Comprehensive Investigation of Pavement Evaluation Through Field and Laboratory and Prioritization

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