Effect of polymer additives and process temperature on the physical properties of bitumen‐based composites

Abstract

Polymer modified bitumen (PMB) is a binder obtained by the incorporation of polymer into the bitumen by mechanical mixing or chemical reaction. This study deals with the modification of bitumen with three types of polymers (LDPE, EVA, and SBS) in the presence of filler (CaCO 3 ). The morphological, mechanical, rheological properties, and thermal conductivity of the PMBs have been analyzed by scanning electron microscopy, tensile testing, melt flow index (MFI) measurements and hot wire method, respectively. The results indicate that the abovementioned properties of PMBs are influenced by polymer and bitumen nature and its composition. The mechanical properties of composites prepared at different temperatures exhibit small differences. In general, the inclusion of polymer increases tensile strength and Young's modulus and reduces percentage strain and MFI values, also, polymer inclusion reduces the thermal conductivity values of the composites. V

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

“…This led to the use of the EVA [90,[111][112][113][114][115][116][117][118][119] copolymer, which is probably the second in order of importance after SBS for asphalt modification. Similarly to EVA, other plastomers derived from copolymerization of a functionalized vinyl monomer with ethylene have been suggested and studied, including the entire class of acrylic polymers such as polyethyl acrylate (PEA), polymethyl acrylate, polybutyl acrylate (PBA), poly(ethylene-co-butyl-acrylate) (EBA), poly(ethylene-coacrylic acid) (EAA), poly(ethylene-co-methyl acrylate) (EMA), and poly(methyl methacrylate) [25,30,91,114,120,121].…”

“…For this reason, their main application is in asphaltic roofing membranes, where the high-shear mixing phase is followed by a rapid cooling that freezes the morphology, which remains kinetically stable during room-temperature storage. Nevertheless, extensive literature on olefinic PMAs for paving applications is available (see e.g., [76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93]), but storage stability is not often mentioned.…”

Dependences of Sma Mixture and Its Bituminous Binder Properties on Bitumen Batching System, Mixing Time and Temperature on Asphalt Mixing Plant

“…One of the prime roles of a bitumen modifier is to increase the resistance of the asphalt to permanent deformation at high road temperatures without adversely affecting the properties of bitumen or asphalt at other temperatures. Studies (Nien et al 2008;Doğan, Bayramli 2009;Topal et al 2011) have proved that the use of various polymer additives to improve the properties of the mixture is well-grounded. Polymer modification of asphalt binders has increasingly become the norm in designing optimally performing pavements, particularly in the United States, Canada, Europe and Australia.…”

Physical properties and chemical bonding of advera® modified asphalt binder

“…A broader range of chemical properties is demonstrated by asphalt binders depending on the source of crude oil and processes used to produce the asphalt binder. Asphalt binder is a thermoplastic liquid which behaves as an elastic solid at low service temperatures and at high temperatures, it behaves as a viscous liquid [1]. According to Yero and Hainin [2], the binder forms about 4 -6% of the weight of the mixture, while the aggregate comprises between 94 -96% by weight asphalt concrete mixture.…”