Rutting Performance Evaluation of Hot Mix Asphalt and Warm Mix Asphalt Mixtures by Using Dynamic Modulus, Hamburg Wheel Tracking Tests, and Viscoelastic Finite Element Simulations

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

doi:10.1061/9780784483183.009

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…The absence of proper drainage systems can cause water to accumulate behind the wall and exert pressure on it, leading to failure. The quality of materials such as soil, reinforcement, and geosynthetic fabrics can also impact the wall's strength and durability [2]- [4]. Insufficient site preparation can lead to soil instability, causing the wall to shift or settle over time.…”

Section: Introductionmentioning

confidence: 99%

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

Alimohammadi,

Memon

2023

jcer

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This study presents an investigation into the failure of a Mechanically Stabilized Earth (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. Our 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 our findings, we propose a set of recommendations 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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Section: Introductionmentioning

confidence: 99%

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

Alimohammadi,

Memon

2023

jcer

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“…For assessing the rutting behavior of HMAC, various test methods have been adopted by researchers [14]. According to the Superpave standard, G * /sinδ was used to evaluate the rutting potential of asphalt binder, which could be obtained by performing tests on the dynamic shear rheometer (DSR) [15,16].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of Dynamic Characteristics of a New High-Modulus Asphalt Mixture

Zhang

Yang

et al. 2022

Sustainability

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With the rapid increase in traffic volume and heavy-duty vehicles, rutting has become one of the most serious problems threatening the service quality and life of asphalt pavement. High-modulus asphalt concrete is a promising method to overcome this problem, contributing to the sustainable development of asphalt pavement. In this study, a new composite high-modulus agent (CHMA)-modified asphalt binder and mixture were prepared, and their dynamic mechanical characteristics were investigated by the dynamic shear rheometer, dynamic modulus test, wheel tracking test, frequency sweep test at a constant height (FSCH), and repeated shear test at a constant height (RSCH) to comprehensively evaluate its high-temperature stability. Test results showed that the rheological property of the CHMA-modified asphalt binder was similar to that of low-graded asphalt binder, implying that it had a strong potential in resisting deformation. The dynamic modulus of AC-20(CHMA) was 19,568 MPa at 15 °C and 10 Hz condition, meeting the requirement for the high-modulus asphalt mixture (higher than 14,000 MPa). The dynamic stability of AC-20(CHMA) was 8094 times/mm, lower than that of AC-20(20#), but remarkably higher than that of AC-20(SBS). AC-20(20#) and AC-20(CHMA) both showed strong shear resistance according to the FSCH test results. Under the repeated shear loadings, the growth rate of the shear strain increased rapidly in the primary stage, and then slowed down gradually, finally reaching a constant growth rate. The shear slope of AC-20(CHMA) was between that of AC-20(20#) and AC-20(SBS), demonstrating that its resistance to repeated shear loadings was superior to AC-20(SBS), although slightly weaker than AC-20(20#). The findings in this study provide references for alleviating rutting problems and improving the lifespan of asphalt pavement.

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“…Proactive measures strive to minimize sinkhole occurrences by assessing and managing the geological perils linked with karst topography. This may entail comprehensive geological surveys, continuous monitoring of groundwater levels, land-use planning regulations, and the adoption of engineering practices attuned to the distinct attributes of karst landscapes [19] to [25]. Conversely, reactive strategies concentrate on addressing sinkhole formation post-occurrence.…”

mentioning

confidence: 99%

“…These encompass employing geophysical surveys, harnessing remote sensing technologies, and utilizing advanced modeling tools to precisely evaluate and monitor karst-related hazards. Additionally, the incorporation of naturebased solutions like bioengineering and ecological restoration offers sustainable avenues for mitigating sinkhole impacts while bolstering ecosystem resilience [29] to [40]. Nevertheless, despite these strides, significant challenges persist in effectively managing karst hazards and addressing sinkhole risks.…”

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confidence: 99%

Mitigation of A Sinkhole in Nashville, Tennessee: A Case Study with Compaction Grouting Approach

Alimohammadi,

Memon

2024

Preprint

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Sinkholes pose significant challenges to the stability and safety of infrastructure, requiring thorough investigation and effective mitigation strategies. This study examines a persistent sinkhole issue along a driveway in Nashville, Tennessee, which has intermittently caused pavement subsidence and dropout for several years, despite repeated repair attempts. A comprehensive investigation was undertaken, including site visits, field drilling operations, and assessments of soil, rock, and groundwater. Subsurface exploration revealed a complex geological profile dominated by the Hermitage Formation from the Ordovician Period, with karst-prone geology contributing to soil erosion and ground subsidence risks. Varying soil and rock conditions were observed, with fill materials covering natural clay and limestone bedrock. Several mitigation options were considered, including conventional inverted rock filter sinkhole repair, constructing a land bridge, and compaction grouting. After careful review, compaction grouting emerged as the preferred method due to its effectiveness in stabilizing the area and preventing future sinkhole occurrences, while also being practical and cost-effective. The proposed repair strategy involving compaction grouting is detailed, covering methodology, materials, and construction specifications. Recommendations emphasize the importance of implementing the compaction grouting program, based on evaluations and consultations with specialists. This study offers valuable insights into sinkhole mitigation strategies applicable to similar geological conditions worldwide, emphasizing the need for ongoing monitoring and maintenance to address potential future sinkhole occurrences. Additionally, the findings are expected to inform the development of improved design standards and construction practices for sinkhole repairs in karstic areas, not only in Tennessee but also in other regions facing similar geotechnical challenges.

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Rutting Performance Evaluation of Hot Mix Asphalt and Warm Mix Asphalt Mixtures by Using Dynamic Modulus, Hamburg Wheel Tracking Tests, and Viscoelastic Finite Element Simulations

Cited by 10 publications

References 6 publications

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

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

Laboratory Evaluation of Dynamic Characteristics of a New High-Modulus Asphalt Mixture

Mitigation of A Sinkhole in Nashville, Tennessee: A Case Study with Compaction Grouting Approach

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