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Effects of diluted methanol and water as foaming agents on the performance of latex foamed warm asphalt mixtures

Journal of Traffic and Transportation Engineering(English Edition) 2023年第3期10卷 413-426页

作者： Mohd Rosli Mohd Hasan Tai Guo Hainian Wang Sharvin Poovaneshvaran Ashiru Sani Muhammad Khuzaimi Aziz seyed reza omranian School of Civil Engineering Universiti Sains Malaysia(Engineering Campus)Nibong Tebal 14300Pulau PinangMalaysia School of Highway Chang'an UniversityXi'an 710064China Department of Civil Engineering Kano University of Science and TechnologyKano 3244Nigeria Faculty of Applied Engineering EMIB Research GroupUniversity of AntwerpAntwerp 2020Belgium

Latex as an asphalt modifier has gained popularity in the asphalt industry as it improves the durability of asphalt ***,the elastomeric properties of latex stiffen the asphalt binders,resulting in additional energy consumption during the production of asphalt mixtures,which may cause a higher emission of greenhouse *** is undesirable for sustainable development and the *** this study,the applicability of diluted methanol and water was comparatively evaluated as foaming agents in the production of warm mix asphalt(WMA)mixtures incorporating *** methanol was used because it has a lower boiling point and latent heat than water,allowing the asphalt mixture to be produced at a lower temperature and thus consuming less *** performance of the foamed asphalt mixture was investigated through service characteristics,mechanical performance,and moisture susceptibility of *** service characteristics,on the other hand,were measured in a laboratory while preparing and compacting the asphalt mixture,which refers to the amount of energy required during the production and construction stages in the asphalt plant and on the construction site,*** degree of energy required was assessed based on the workability index,coatability index,and the compaction energy *** mechanical performance of asphalt mixtures was characterized by indirect tensile strength,resilient modulus,and dynamic creep *** resistance to moisture damage was evaluated based on the common parameter,indirect tensile strength *** findings revealed that the use of diluted methanol foaming agent helped improve the workability of latex modified asphalt *** foamed latex-modified WMA demonstrated better performance compared to asphalt mixtures prepared using water as the foaming agent.

关键词： Asphalt mixtures Foaming technology Natural resources Low emission Elastomer Lower energy consumption

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Evaluation of asphalt mixture behavior incorporating warm mix additives and reclaimed asphalt pavement

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Journal of Traffic and Transportation Engineering(English Edition) 2018年第3期5卷 181-196页

作者： seyed reza omranian Meor Othman Hamzah Lillian Gungat Sek Yee Teh School of Civil Engineering Universiti Sains Malaysia Engineering Campus Civil Engineering Programme Faculty of Engineering Universiti Malaysia Sabah

Incorporation of warm mix asphalt （WMA） and reclaimed asphalt pavement （RAP） has benefited the asphalt industry in many ways such as reducing the demand for virgin materials, lowering energy requirement during the asphalt production and construction, in addition to reducing greenhouse-gas emissions. This study evaluated the effects of Evotherm and RH-WMA and RAP on mixtures＇ behavior in terms of the compaction energy index （CEI）, indirect tensile strength （ITS） and resilient modulus. The results showed that warm mix additives reduced the CEI, ITS and resilient modulus; while RAP increased the corresponding values. Statistical analysis showed that mixtures incorporating Evotherm and RAP had significant effects on CEI, while the effects of RH-WMA on the corresponding value were found to be statistically insignificant. General Linear Model showed that Evotherm, RAP and RH-WMA exhibited no significant effects on the ITS and resilient modulus. The one-way analysis of variance showed that Evotherm influenced mixture behavior significantly, while RAP and RH-WMA effects were found to be statistically insignificant. Regression equations with high accuracy levels were proposed to predict CEI, ITS and resilient modulus with respect to modification of mixture variables such as mix constituents （Evotherm, RH-WMA, and RAP） and compaction temperature.

关键词： Warm mix asphalt Reclaimed asphalt pavement Workability Compaction energy index Indirect tensile strength Resilient modulus

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