Predictive model of modified asphalt mixtures with nano hydrated lime to increase resistance to moisture and fatigue damages by the use of deicing agents
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- @Article{BEHBAHANI:2020:CBM,
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author = "Hamid Behbahani and Gholam Hossein Hamedi and
Vahid {Najafi Moghaddam Gilani}",
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title = "Predictive model of modified asphalt mixtures with
nano hydrated lime to increase resistance to moisture
and fatigue damages by the use of deicing agents",
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journal = "Construction and Building Materials",
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volume = "265",
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pages = "120353",
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year = "2020",
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ISSN = "0950-0618",
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DOI = "doi:10.1016/j.conbuildmat.2020.120353",
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URL = "http://www.sciencedirect.com/science/article/pii/S0950061820323588",
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keywords = "genetic algorithms, genetic programming, Asphalt
mixture, Moisture susceptibility, Fatigue life, Surface
free energy, Deicing agents, Nano hydrated lime,
Two-objective optimization",
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abstract = "Deicing agents are used to dissolving the frost on
road surfaces in winter and cold areas. Researchers
have evaluated the impact of different deicing agents
on the moisture susceptibility performance of asphalt
mixtures, but they have not investigated the effect of
these agents on fatigue failure and thermodynamic
parameters of asphalt mixtures. Therefore, in this
research, by investigating the effect of two new
deicing agents of calcium magnesium acetate (CMA) and
potassium acetate (PA) as well as sodium chloride
(NaCl) traditional agent on moisture and fatigue
performances of asphalt mixtures, predictive model of
the tensile strength ratio (TSR) and the fatigue life
ratio (NFR) using genetic programming (GP) based on the
surface free energy (SFE) components and other
properties of asphalt mixtures were presented. Nano
hydrated lime (NHL) was applied as an asphalt binder
modifier and an anti-stripping agent to improve the
strength of asphalt mixtures. The results indicated
that the saturated mixtures in CMA had the highest
indirect tensile strength (ITS) and fatigue life in
lower freeze-thaw cycles, while the NaCl-saturated
samples had more ITS and fatigue life in higher cycles.
The CMA-saturated samples had the greatest TSR and NFR.
Using NHL in all saturated samples resulted in
increasing TSR and NFR values. Results of SFE method
showed that using NHL increased the polar, non-polar
and basic components of asphalt binders and decreased
their acidic components. Also, using NHL increased the
total SFE amount of asphalt binder, enhancing the
adhesion of aggregate and asphalt binder and cohesion
in asphalt binder membrane, and as a result, improving
the moisture resistance in asphalt mixtures. Using
1.5percent NHL had the greatest effect on improving
adhesion free energy (AFE), cohesion free energy (CFE)
and detachment energy (DE). Among deicing solutions,
CMA had the highest CFE, in general, and NaCl had the
best DE values. PA-saturated samples had the greatest
permeability of asphalt mixture (PAM) values. GP model
had a high R2 96.4percent and 98.3percent for TSR and
NFR, respectively. Using GP model to achieve the
maximum TSR and NFR, the Pareto curve showed that
1.32percent NHL was the optimum value for
simultaneously increasing moisture resistance and
fatigue life",
- }
Genetic Programming entries for
Hamid Behbahani
Gholam Hossein Hamedi
Vahid Najafi Moghaddam Gilani
Citations