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Title |
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SusChEM/Collaborative Research: Fundamental Understanding of Foaming Process towards a New Warm Mix Asphalt Technology
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Participants |
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- Huiming Yin
- Gan Song (Ph.D. student)
- Gisele G. Ribeiro (Ph.D. student)
- John E. Angarita (undergraduate student)
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Project Quad |
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Summary/Objectives |
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The primary objective of this project is to understand the foaming process using several foaming agents (solid, gas and liquid) to guide us in the design of a new warm mix asphalt (WMA) technology based on a single or the combination of several foaming agents, which depends on the pH value and rheological properties of virgin asphalt binder. In the proposed project, researchers from Columbia University and Michigan Technological University will investigate foaming agents such as solid (baking soda for acid asphalt), gas (CO2/N2), and liquid (ethanol) as candidates for foamed WMA. Integrated multiphase characterization and viscoelastic modeling studies will be conducted to investigate how microstructure of asphalt materials evolves with time, temperatures, and proportion of material constitutes. The materials can be treated as a thermodynamic system and the volumetric properties changing with time and temperature can be interpreted by the phase transition of water under a certain air pressure. A dissipative particle dynamics model will be developed to simulate the foaming process, and then the microstructure generated will be used by a micromechanics-based model for prediction of the mechanical properties changing with volumetric properties. Through master curves of creep compliance and S-N curves of fatigue strength, the long-term performance and life cycle cost of asphalt materials can be characterized with accelerated test methods.
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Method |
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- Micromechanics-based modeling of the effective rheological behavior
- Equivalent inclusion method based boundary integral formulation to simulate its structure
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Publications |
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- G.G.Ribeiro, J.E.Angarita, H.M.Yin, 2014, Experimental characterization of ethanol based asphalt foam formation, Road Materials and Pavements Design (In preparation)
- V. Nasri, L. Arias, H.M. Yin, 2012, Ethanol based foaming approach to a novel warm mix asphalt technology, Odebrecht Award for Sustainable Development 2012
- H.M. Yin, Z.R. Luo, Investigation of the nuclear gauge density calibration method, Road Materials and Pavement Design, 10, 625-645, 2009.
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