Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design | Science Publications

American Journal of Engineering and Applied Sciences

Taher M. Abu-Lebdeh¹  Shamim A. Begum¹  Renaldo Walters¹  Elham H. Fini¹ 

关键词: Bio-Char;    Aging;    Asphalt Binder;    Rotational Viscometer;   

DOI  :  10.3844/ajeassp.2015.138.146

学科分类：工程和技术（综合）

来源: Science Publications

【 摘 要 】

Thelife expectancy of Asphalt Binder (AB) has been negatively impacted by theharsh bombardment of Ultraviolet (UV) rays. UV rays cause asphalt to oxidizefaster, which results in the deterioration of asphalt’s rheologicalcharacteristics that can lead to pavement distresses. This paper investigatesmerits of bio-char to improve asphalt aging susceptibility by blending onecontrol binder (PG 64-22) and two bio-modified binder at concentrations of 3and 6% individually; the specimens were then analyzed in terms of theirrheological characterization before and after aging. Rolling Thin Film Oven(RTFO) method was used to age all specimens, aged and un-aged samples were thentested using a Rotational Viscometer (RV) to evaluate the changes in theirrheological behavior before and after aging as a result of aforementionedmodifications. This paper also looks at the chemical composition and elementalanalysis of bio-char along with bio-chars’ ability to absorb chromium. Asorption procedure was used to determine whether or not bio-char can be used toabsorb chromium. The highest chromium removal occurred at a pH value of 5.5.Bio-char was used to improve dispersion and liquid retention, while enhancingoxidation resistance.

【 授权许可】

Unknown