Leila Hashemian

Area of Study / Keywords

Construction Engineering

Research

Research Interests

• Pavement material 
• Asphalt mix design (hot, warm, half-warm, cold) 
• Asphalt technology 
• Asphalt recycling (cold and hot) 
• Soil stabilization using cementitious material 
• Asphalt and concrete pavement design 
• Road maintenance, rehabilitation and management 
• Pavement instrumentation and response analysis  

Research Program

Design and Performance Evaluation of Road Base Courses Comprised of Asphaltenes Derived from Alberta Oil Sands

This research is focused on using asphaltenes derived from Alberta oil sands in high quality road base course construction. The performance of two different types of road base course asphalt mixes is being studied: 1) high-modulus base course comprising asphaltene-enriched binder; and 2) granular road base materials stabilized using asphaltene and bitumen emulsions. 

Asphalt Concrete Modification to Improve Flexible Pavement Performance in Cold Regions

This research involves conducting laboratory investigations to understand the effects of adding various asphalt modifiers, including nanomaterials and fibers, on the properties of asphalt mixes at different temperatures and environmental conditions. 

Select Refereed Journal Publications 

Hashemian L, and Bayat A. (2018). Field Evaluation of Load-Bearing Capacity of Tire Fill Embankment Pavements. Journal of Testing and Evaluation.

Haghi Tavafzadeh N*, Ahmadian M*, Hashemian L, Bayat A. (2019). Capital Cost Comparison of Pavements Comprised of Insulation Layers- A Case Study in Edmonton, Canada. Journal of Construction Engr. & Management.

Hashemian L, Rios V*, Bayat A. (2018). Laboratory Investigation of Pavement Backfilling Materials for Microtrenching in Cold Regions. Transportation Research Record (TRR), Journal of the Transportation Research Board.

Shafiee M*, Hashemian L, Rostami A*, Tabatabaee N, Bayat A. (2018). Field Measurement and Modeling of Vertical and Longitudinal Strains from Falling Weight Deflectometer Testing. Journal of Transportation Engineering Part B: Pavements. 144(1): 1-9.

Biswas S*, Hashemian L, Bayat A. (2018). Investigation on Pothole Severity and Maintenance Methods in Canada throughout Questionnaire Survey. Journal of Cold Regions Engineering. 32(2): 1-9.

Select Refereed Conference Publications 

Rios V*, Hashemian L. (2019). Laboratory Investigation of Foam Grout Performance under Freeze and Thaw Conditioning. 98th Transportation Research Board of National Academy of Science Conference, Washington DC, United States Paper

Newstead B*, Hashemian L, Bayat A. (2019). Investigation of Ambient Noise, Surface Quality Improvements, and Friction Characteristics of Different Asphalt Surfaces in Alberta, Canada. 98th Transportation Research Board of National Academy of Science Conference, Washington DC, United States

Hashemian L, Bayat A. (2018). Evaluation of Tire Material as Pavement Embankment. GeoEdmonton 2018, Edmonton, Canada

Rios V*, Johnson T*, Hashemian L. (2018). Laboratory investigation of using foam concrete as micro-trench backfilling material in cold regions. Transportation Association of Canada (TAC), Saskatoon, Canada

Hashemian L, Tavafzadeh N, Bayat, A. (2017). Evaluation of Pavement Load Bearing Capacity Comprised of Insulation Layers during Thaw Season. Tenth International Conference on the Bearing Capacity of Roads, Railways and Airfields, Athens, Greece

CIV E 618 - Advanced Pavement Material and Design

Main concepts of design and construction of asphalt pavement systems: Review of pavement structures, materials and testing. Superpave classification for asphalt binders. Advanced analysis/design of flexible pavement structures, including Empirical and Mechanistic-Empirical methods considering climate and environmental impacts. Identifying typical flexible pavement failures and maintenance methods. Application of non-destructive techniques to evaluate pavement load-bearing capacity and layers stiffness will be discussed. Prerequisite: Consent of the instructor.

ENV E 251 - Properties of Environmental Engineering Materials

Study of materials used in environmental engineering including traditional engineering materials such as soil and rock, concrete, steel, and wood but extending the coverage to man made materials such as plastics, textiles, membranes, composites, resins, and polymers. Prerequisite: EAS 210 and CIV E 270. Corequisite: STAT 235. Credit cannot be obtained for both ENV E 351 ad ENV E 251.

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