Field and simulated rutting behavior of hot mix and warm mix asphalt overlays

Alimohammadi, Hossein; Zheng, Junxing; Buss, Ashley; Schaefer, Vernon R.; Williams, Christopher R.; Zheng, Guangfan

doi:10.1016/j.conbuildmat.2020.120366

Cited by 25 publications

(9 citation statements)

References 15 publications

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“…2 Civil Engineering Department, Associate Professor, Ferdowsi University of Mashhad, Mashhad, Iran. 3 School of Mechanical Engineering, University of Tehran, Tehran, Iran. 4 The Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, USA.…”

Section: Discussionmentioning

confidence: 99%

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Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

et al. 2021

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The primary objective of this study is to investigate the benefits of adding tire rubber as an inclusion to backfill behind integral bridge abutments. In this respect, four physical model tests that enable cyclic loading of the backfill-abutment are conducted and evaluated. Each test consisted of 120 load cycles, and both the horizontal force applied to the top of the abutment wall and the pressures along the wall-backfill interface is measured. The primary variable in this study is the tire rubber content in the backfill soil behind the abutment. Results show adding tire rubber to the backfill would be beneficial for both pressure and settlement behind the abutment. According to results, adding tire rubber to soil decreases the equivalent peak lateral soil coefficient (Keq-peak) up to 55% and earth pressure coefficient ($${K}^{*}$$ K ∗ ) at upper parts of the abutment up to 59%. Moreover, the settlements of the soil behind the wall are decreased up to 60%.

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Section: Discussionmentioning

confidence: 99%

“…There are many efforts and researches to attenuate pavement and bridge problems every year [12,16,36,3,8,17,19]. One of the most problematic issues with conventional bridges is the malfunctioning of sliding bridges.…”

Section: Introductionmentioning

confidence: 99%

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

et al. 2021

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“…A site visit was conducted to assess the damage caused by the retaining wall failure, and the wall's design and construction were analyzed to identify potential weaknesses. Field data collection involved conducting geotechnical investigations to assess the engineering properties of the soil and rock strata in the area [23]- [27]. The laboratory testing program included assessing the properties of the soil and rock strata and examining soil samples in accordance with the Unified Soil Classification System (USCS) [28].…”

Section: Methodology and Backgroundmentioning

confidence: 99%

A Case Study of Mechanically Stabilized Earth (MSE) Retaining Wall Failure in the State of Tennessee; Recommendations for Future Design and Constructions

Alimohammadi¹,

Memon²

2023

Preprint

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This study presents an investigation into the failure of a MSE retaining wall in Tennessee, USA. The wall was constructed to support an embankment development, but it failed catastrophically, causing damage to the road and posing a significant safety risk to the public. The investigation involved a comprehensive site visit, field data collection, laboratory testing, and numerical modeling. This investigation revealed that the failure of the retaining wall was caused by inadequate construction practices. Specifically, the wall was not constructed in accordance with design specifications, and the backfill material used was not properly compacted. The construction issues resulted in the differential settlement of the wall, which ultimately caused it to fail. Based on the findings of this study, a set of recommendations were proposed for the design and construction of future retaining walls in similar geotechnical conditions. The recommendations include the proper selection and use of backfill material, proper compaction of backfill, and adherence to design specifications. The results of this study are expected to contribute to the development of improved design standards and construction practices for MSE retaining walls in Tennessee and other regions with similar geotechnical conditions.

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“…Since there are many situations where the bearing capacity of the footings adjacent to the sloping surfaces, are significantly reduced from that of footings located on horizontal ground, solutions such as improving the geometry of sloping surfaces, injections, or use of soil reinforcers are required to improve the bearing capacity of foundations under such conditions. One suitable method for improving the bearing capacity of footings is to reinforce the slope with geosynthetic layers [8,9] that can be used on a steep slope in various applications such as widening the road [10][11][12][13] and repairing collapsed slopes [14][15][16]. When the footing is built on such a reinforced slope, the bearing capacity and settlement can be significantly improved, depending on the procedures used to install the reinforcement layers and the reinforcement characteristics [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity of Shallow Footings Reinforced with Braid and Geogrid Adjacent to Soil Slope

Satvati

Alimohammadi

Rowshanzamir

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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One of the common features used for improving the bearing capacity of footings adjacent to a soil slope is reinforcement by geosynthetics. These elements may somehow isolate the soil inside of the geosynthetic and eliminate shear-stress mobilization. In this study, a new kind of three-dimensional geosynthetics called expandable braided sleeve (braid) and geogrid have used a laboratory modeling approach to investigate the effects of different variables on the bearing capacity of footings on soil slopes. Some parameters, including relative density and soil compaction, were assumed constant in all tests. In contrast, other variable parameters, including the vertical distance between the surface and the first layer of geosynthetics, the distance of a footing from the slope edge, and planar and tabular shapes of braid and geogrid were investigated. Results demonstrated that for the same conditions of some parameters, cylindrical reinforcement has a more significant effect than the planar form of the reinforcement concerning enhancing bearing capacity and settlement reduction. Inclusion of geosynthetic reinforcement can also reduce stress concentration and distribute the applied load, resulting in settlement reduction. Moreover, braid material was found to result in somehow better performance than geogrids in reducing settlement.

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Field and simulated rutting behavior of hot mix and warm mix asphalt overlays

Cited by 25 publications

References 15 publications

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

A Case Study of Mechanically Stabilized Earth (MSE) Retaining Wall Failure in the State of Tennessee; Recommendations for Future Design and Constructions

Bearing Capacity of Shallow Footings Reinforced with Braid and Geogrid Adjacent to Soil Slope

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