https://arpi.unipi.it/bitstream/11568/798598/2/polacco%20798598.pdf

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

The use of polymer-modified binders in asphalt mixtures has become more widespread due to their reduced thermal susceptibility and improved rutting and fatigue resistance. Nevertheless, their high cost limits their application, thus making the use of reclaimed polymers (RP) an interesting alternative for both reducing price and extending the service life of pavements. This paper; therefore, presents a comparative review of the recycled polymers most commonly studied as bitumen modifiers: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and ground tire rubber (GTR), in order to facilitate their selection and extend the use of the bitumen. The differences in terms of melting point, mixing conditions, and maximum quantity of added polymer are analyzed. Moreover, their effect on the mechanical behavior of the asphalt binders and their stability with and without the use of additives is presented. According to the literature revision, the performance of the new binder is more influenced by the kind of polymer that was incorporated and the mixing conditions than by the base bitumen that was chosen, although rheological evaluation is needed to fully understand the modification mechanisms of the modified binder. In general terms, plastomers have a stronger effect in terms of increasing the stiffness of the bitumen in comparison with crumb rubber (elastomers), thus providing an improved rutting resistance. The joint use of polyethylene (plastomer) and crumb rubber (elastomer) can be an interesting option for its recycling potential and mechanical performance, although further study is needed to achieve stable bitumen across the entire range of temperatures; additives, such as maleic anhydride (MA), are commonly employed to improve the stability of the binder and enhance its characteristics, but their use could limit the economic benefits of using recycled materials.

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

Modification mechanism of asphalt binder with waste tire rubber and recycled polyethylene

THE half-century which has elapsed since the first issue of NATURE has witnessed an extraordinary development of science in general, but in no department has it been more marked, or the changes more profound, than in chemistry. Before dealing with the period over which the existence of this journal extends, it may not be uninteresting to indicate, in the broadest possible outline, the main features of progress in chemical science to which the growth we have witnessed during the last fifty years is in reality due.

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Progress of Chemistry

This research sheds light on the concept of eco-friendly road construction which comprises eco-design, eco-extraction, eco-manufacturing, eco-construction, eco-rehabilitation, eco-maintenance, eco-demolition, and socioeconomic empowerment. It also revealed the challenges being faced in its adoption and the benefits derivable from its application. Furthermore, the effects of recycling PET plastic bottle wastes produced in North Central Nigeria in bituminous asphaltic concrete (BAC) used in flexible pavement construction were also evaluated. The mix design consists of 60/70 penetration-grade asphaltic concrete (5%), 68% coarse aggregate, 6% fine aggregate, and 21% filler using the dry process at 170°C. The optimum bitumen content (OBC) for conventional BAC was obtained as 4% by weight of total aggregates and filler. Polymer-coated aggregate (PCA)-modified BAC seems preferable because it has the potential to utilize more plastic wastes with a higher optimum plastic content (OPC) of 16.7% by weight of...

Recycling of polyethylene terephthalate (PET) plastic bottle wastes in bituminous asphaltic concrete

Effect of linear low density-polyethylene grafted with maleic anhydride (LLDPE-g-MAH) on properties of high density-polyethylene/styrene–butadiene–styrene (HDPE/SBS) modified asphalt

The invention provides a modified biological asphalt material, a biological asphalt mixture, a preparation method thereof and applications. The modified biological asphalt material is prepared by a mixture of a biological asphalt compound, a modifying agent, a compatilizer and a stabilizing agent. The preparation method is simple and easy to practice, the pollution is low in a production process, and raw materials are simple and easy to obtain. The obtained modified biological asphalt material can be directly used as road asphalt for mixture production. The biological asphalt mixture and the preparation method thereof are provided, and the obtained biological asphalt mixture can be used for paving roads.

Modified biological asphalt material, biological asphalt mixture, preparation method thereof and applications

Chemical composition of bio-binders derived from three different representative biomass sources has been characterised and compared by elemental analysis, Fourier Transform Infrared, 1H NMR and Vap...

Comparative analysis of bio-binder properties derived from different sources

The invention discloses reinforced emulsified asphalt concrete for roads and a preparation method of the concrete. The reinforced emulsified asphalt concrete for the roads comprises aggregate, waterborne epoxy resin emulsion and emulsified asphalt, wherein the weight ratio of aggregate to waterborne epoxy resin emulsion to emulsified asphalt is (90-110): (0.1-10): (7-20). The reinforced emulsified concrete disclosed by the invention can be used as cold-mixed and cold-laid asphalt concrete for being applied to spreading or repairing and the like of asphalt pavements, can solve the problems of high temperature sensitivity, insufficient binding capacity, poor durability and the like of traditional asphalt type material, and retains the advantages of low pollution and easiness in construction and operation of the emulsified asphalt and obtains excellent performances of high strength, high binding force, durability in use and the like through waterborne epoxy resin.

Reinforced emulsified asphalt concrete for roads and preparation method of concrete

The invention provides a biological asphalt, a biological asphalt composition and a preparation method, which belongs to the asphalt material technical field. According to the invention, biological oil is taken as a raw material, at least two processes in four processes of distilling, extracting, oxidizing and blending are used to prepare the biological asphalt, and the biological asphalt is mixed with one or more of petroleum asphalt, coal tar asphalt, natural asphalt and an auxiliary agent according to certain proportion and technology to obtain the biological asphalt composition. The invention also comprises the preparation method of the biological asphalt composition.

Min He

Papers

Effect of linear low density-polyethylene grafted with maleic anhydride (LLDPE-g-MAH) on properties of high density-polyethylene/styrene–butadiene–styrene (HDPE/SBS) modified asphalt

Modified biological asphalt material, biological asphalt mixture, preparation method thereof and applications

Comparative analysis of bio-binder properties derived from different sources

Reinforced emulsified asphalt concrete for roads and preparation method of concrete

Biological asphalt, biological asphalt composition and preparation method