Investigation of the potential application of biodiesel by-product as asphalt modifier

The potential application of biodiesel by-product as an asphalt modifier was investigated in terms of chemical composition and performance grades tests. Modified asphalt binders were prepared by adding four contents of biodiesel by-product into control binder. First, Fourier transform infrared spectroscopy (FT-IR) test was conducted to investigate the chemical composition and modification mechanism of experimental materials. Then, rotational viscometer test for original asphalt, dynamic shear rheometer test for original, rolling thin film oven-aged and pressure ageing vessel (PAV)-aged asphalt, bending beam rheometer test for PAV-aged asphalt were carried out to investigate the effect of biodiesel by-product on performance grades of control asphalt binder. Finally, storage stability test was conducted to analyse the segregation tendency of by-product-modified asphalt binders. The FT-IR test results indicated that no chemical reaction occurred between control asphalt and biodiesel by-product. Meanwhile, the addition of biodiesel by-product reduced the rotational viscosity of the asphalt binder, hence lowered the optimum mixing and compaction temperatures of asphalt concrete. Moreover, the addition of biodiesel by-product decreased the high-temperature performance of asphalt binder, while improved the low-temperature performance and fatigue resistance performance. In addition, a good storage stability of by-product-modified asphalt binders was noticed. Finally, considering the performance variations of by-product-modified asphalt and environmental requirements, the content of by-product recommended to be used as PG64-16 asphalt binder's modifier in cold region was 4%.

[1]  Fangxia Yang,et al.  Value-added uses for crude glycerol--a byproduct of biodiesel production , 2012, Biotechnology for Biofuels.

[2]  R. Christopher Williams,et al.  Bio-Renewable Asphalt Modifiers and Asphalt Substitutes , 2012 .

[3]  Mohammed Abdul Raqeeb,et al.  Biodiesel production from waste cooking oil , 2015 .

[4]  Shaopeng Wu,et al.  High temperature properties of rejuvenating recovered binder with rejuvenator, waste cooking and cotton seed oils , 2014 .

[5]  Qingli Dai,et al.  Mechanical performance of asphalt mixtures modified by bio-oils derived from waste wood resources , 2014 .

[6]  Zhanping You,et al.  Partial replacement of asphalt binder with bio-binder: characterisation and modification , 2012 .

[7]  Shaopeng Wu,et al.  Physical, chemical and rheological properties of waste edible vegetable oil rejuvenated asphalt binders , 2014 .

[8]  Gang Liu,et al.  Organo Montmorillonite Nanoclay: Alternative Modifier to Sustain Durability of Asphalt Pavement , 2012 .

[9]  Haifang Wen,et al.  Laboratory Evaluation of Waste Cooking Oil-Based Bioasphalt as an Alternative Binder for Hot Mix Asphalt , 2013 .

[10]  Mohamed Abdel Raouf,et al.  General Rheological Properties of Fractionated Switchgrass Bio-Oil as a Pavement Material , 2010 .

[11]  Shu Wei Goh,et al.  Evaluation of Low-Temperature Binder Properties of Warm-Mix Asphalt, Extracted and Recovered RAP and RAS, and Bioasphalt , 2011 .

[12]  M. Misra,et al.  Sustainable Bio-Composites from Renewable Resources: Opportunities and Challenges in the Green Materials World , 2002, Renewable Energy.

[13]  M. A. Raouf,et al.  Determination of Pre-Treatment Procedure Required for Developing Bio-Binders from Bio-Oils , 2009 .

[14]  Robert Kluttz.  Considerations for Use of Alternative Binders in Asphalt Pavements: Material Characteristics , 2012 .

[15]  Justinus A. Satrio,et al.  Utilization of Fractionated Bio Oil in Asphalt , 2009 .

[16]  Ming Yu,et al.  Storage stability and compatibility of asphalt binder modified by SBS graft copolymer , 2007 .