Use of grid reinforcement in HMA overlays – A Texas field case study of highway US 59 in Atlanta District

Walubita, Lubinda F.; Mahmoud, Enad; Lee, Sang Ick; Carrasco, Gisel; Komba, Julius J; Fuentes, Luis; Nyamuhokya, Tito P.

doi:10.1016/j.conbuildmat.2019.04.072

Cited by 24 publications

(4 citation statements)

References 12 publications

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“…Geogrids have also proven to be the best modification and it is dependent on the geogrid modulus, stiffness, and cross-section. Walubita et al [37] demonstrated by in situ testing that the use of geogrids for overlay reinforcement is quite beneficial. The testing was conducted on the US Route 59 in Atlanta, Texas.…”

Section: Fly Ashmentioning

confidence: 99%

Prevention and remediation measures for reflective cracks in flexible pavements

2022

JCE

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Considering the high price and the number of natural resources used in transport infrastructure, extending pavement lifetime is a priority for engineers. One of the most common issues in flexible pavement maintenance are reflective cracks, which reduce driving comfort and passenger safety. These cracks have two main origins, those initiated by shrinkage of the cement stabilized layer and the cracks reflected from the old pavement to a new overlay. During road maintenance, the usual remediation measure is to overlay and place a new asphalt wearing course over the old, deteriorated pavement surface. After an asphalt overlay is placed on the deteriorated pavement, the overlay can exhibit an identical crack pattern as the layer below. The main cause of reflective cracks is in the cement bound base course (CBC). Due to cement hydration, traffic load, and temperature oscillations, cracks may occur and propagate through upper layers. Much research has been conducted to prevent this problem. Some research, with an emphasis on recycled materials, is presented in this paper. The remediation measures include thin and thick interlayers and modification of the asphalt overlay characteristics.

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Section: Fly Ashmentioning

confidence: 99%

Prevention and remediation measures for reflective cracks in flexible pavements

2022

JCE

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“…[ 11 , 12 ]. Therefore, asphalt pavements would typically require re-surfacing, overlaying, maintenance, and/or rehabilitation during their service lives to restore their properties and performance characteristics [ 13 ]. In the case of aged asphalt binders and as part of the pavement maintenance/rehabilitation scheme, rejuvenators are often used for rejuvenating, restoring, and recycling the aged asphalt binder, including reclaimed asphalt pavement (RAP) and sealing materials [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

Zhang

Chao²,

Zhou

et al. 2021

Molecules

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Soybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt binder (BRAA) using soybean oil. In the study, the chemical structure of the soybean oil was comparatively characterized using an element analyzer (EA), gel permeation chromatography (GPC), and a Fourier infrared (FTIR) spectrometer, respectively. Based on the chemical structure of the bio-oil, BRAA molecular models were built for computing the diffusion parameters using molecular dynamic simulations. Likewise, a dynamic shear rheometer (DSR) test device was used for measuring and quantifying the rheological properties of the aged asphalt binder rejuvenated with 0%, 1%, 2%, 3%, 4%, and 5% soybean oil, respectively. The laboratory test results indicate that bio-oil could potentially improve the diffusion coefficients and phase angle of the aged asphalt binder. Similarly, the corresponding decrease in the complex shear modulus has a positive effect on the low-temperature properties of BRAA. For a bio-oil dosage 4.0%, the diffusion coefficients of the BRAA components are 1.52 × 10−8, 1.33 × 10−8, 3.47 × 10−8, 4.82 × 10−8 and 3.92 × 10−8, respectively. Similarly, the corresponding reduction in the complex shear modulus from 1.27 × 107 Pa to 4.0 × 105 Pa suggests an improvement in the low-temperature properties of BRAA. Overall, the study contributes to the literature on the potential use of soybean-derived bio-oil as a rejuvenator of aged asphalt binders.

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“…Bennert et al [18] performed field and laboratory forensic analyses of RCs to develop a framework to assess the compatibility between various types of asphalt material overlay and reflective crack-relief interlayer. Pasquini et al [21] and Walubita et al [23] evaluated the effect of interlayer grid reinforcements such as geo-composites on mitigating RCs by means of field sections and the use of two different HMAs. The grid reinforced section presented better performance with respect to RCs and pavement layer bonding compared to the control section; however, similar resistance to rutting along with inferior pavement smoothness was observed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Rheological Models on the Distress Prediction of Composite Pavement

Moon¹,

Falchetto

Park

et al. 2020

Materials

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In this paper, three different rheological models including a newly developed formulation based on the current Christensen Anderson and Marateanu (CAM) model, named sigmoidal CAM model (SCM), are used to estimate the evolution of roughness, rutting, and reflective cracking in a typical composite pavement structure currently widely adopted in South Korea. Three different asphalt mixtures were prepared and dynamic modulus tests were performed. Then, the mechanistic-empirical pavement design guide (MEPDG) was used for predicting the progression of the pavement distress and to estimate the effect of the three different models on such phenomena. It is found that the three different mathematical models provide lower and upper limits for roughness, rutting, and reflective cracking. While the CAM model may not be entirely reliable due to its inability in fitting the data in the high-temperature domain, SCM might result in moderately more conservative pavement design.

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Use of grid reinforcement in HMA overlays – A Texas field case study of highway US 59 in Atlanta District

Cited by 24 publications

References 12 publications

Prevention and remediation measures for reflective cracks in flexible pavements

Prevention and remediation measures for reflective cracks in flexible pavements

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

Effect of Different Rheological Models on the Distress Prediction of Composite Pavement

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