Modifications of Bitumen by Elastomer and Reactive Polymer—a Comparative Study

Selvavathi, V.; Sekar, Vijai Arun; Sriram, V.; Sairam, B.

doi:10.1081/lft-120003577

Cited by 51 publications

(22 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 Bitumen modification by polymers improves its mechanical properties, increases the viscosity, and allows an expansion of temperature range of service and the improvement of the deformational stability and durability. 7,8 The morphology of PMB is the result of the mutual effect of polymer and bitumen, consequently is influenced by bitumen composition, polymer nature and ratio. 9,10 Most polymers are insoluble to some degree in the bitumen matrix, resulting eventually in gross separation of both phases.…”

Section: Introductionmentioning

confidence: 99%

“…These phases may become a continuous phase or a dispersed one depending on polymer nature, concentration and its ability to swell with maltene molecules. [6][7][8] Polymer is swelled by the maltenes which is low molecular weight portion of bitumen so that the remaining bitumen phase is artificially enriched in asphaltenes which is high molecular weight portion of bitumen. This is the case observed when elastomers and thermoplastics such as ethylene vinyl acetate (EVA), styrene butadiene styrene (SBS), low density polyethylene (LDPE), etc.…”

Section: Introductionmentioning

confidence: 99%

“…are mixed with bitumen. [6][7][8][9][10] Polyolefins are produced from olefinic monomers; the resulting homopolymers have nonpolar, nonaromatic nature. The typical range for their solubility parameter is 15.6-17.4 MPa a more polar comonomer yielding a more compatible system.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Doğan¹,

Bayramlı²

2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

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

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Doğan¹,

Bayramlı²

2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…ethylene-glycidyl acrylate (EGA) copolymers and random terpolymers of ethylene, GMA and an ester group (usually methyl, ethyl or butyl acrylate) [2,103,160]. Some of them even have been used in industry.…”

Section: Functionalization and Reactive Polymersmentioning

confidence: 99%

Polymer modification of bitumen: Advances and challenges

Zhu

Birgisson

Kringos

2014

European Polymer Journal

745

287

View full text Add to dashboard Cite

Abstract. Advances and challenges in the field of bitumen polymer modification for road construction during the last 40 years are reviewed in this paper. The history of bitumen polymer modification is described chronologically. Some popular plastomers and thermoplastic elastomers in bitumen modification are discussed regarding their advantages and disadvantages, including polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate (EVA), ethylene-butyl acrylate (EBA), styrene-butadiene-styrene (SBS), styrene-isoprenestyrene (SIS) and styrene-ethylene/butylene-styrene (SEBS). Although these polymers all improve bitumen properties to some extent, there are still some drawbacks limiting the future development of bitumen polymer modification, such as high cost, low ageing resistance and poor storage stability of polymer modified bitumen (PMB). Researchers attempted various ways to remove these drawbacks. Some technical developments for removing drawbacks are reviewed in this paper, including saturation, sulfur vulcanization, adding antioxidants, using hydrophobic clay minerals, functionalization and application of reactive polymers. The future development of polymers for bitumen modification is analyzed as well. Since it is currently challenging to perfectly achieve all expected PMB properties at the same time, some compromised recommendations are given in this paper, among which greatly enhancing the properties with an acceptably high cost, significantly reducing the cost with relatively poor properties and their combinations. Functionalization is emphasized as a promising way to enhance the properties of currently used polymers and develop new-type polymer modifiers with much greater success in the future. It is also recommended that future research on bitumen polymer modification focuses more on function development towards enhancing: adhesion with aggregates, long-term performance and recyclability.

show abstract

“…terpolymers containing glycidyl methacrylate (Polacco et al, 2004;Selvavathi et al, 2002), TDI production waste (Singh et al, 2003) and MDI-derived prepolymers (Martín-Alfonso et al, 2008;Navarro et al, 2006). The later type consists of a "soft or flexible segment" represented by polyols (PEG, PPG, etc), and a "hard or stiff segment" constituted by diisocyanates (MDI, HDI, etc).…”

Section: Introductionmentioning

confidence: 99%

Isocyanate-functionalized castor oil as a novel bitumen modifier

Cuadri

García‐Morales

Navarro

et al. 2013

Chemical Engineering Science

View full text Add to dashboard Cite

The use of biomaterials from renewable sources in the synthesis of polyurethanederived polymers is lately receiving great attention from social, environmental and economic standpoints. In this work, prepolymers having different -NCO/-OH ratio were synthesized, by reaction of 4,4´-diphenylmethane diisocyanate (MDI) with castor oil (CO), to be used as modifying agent of asphaltic bitumen. Reactions between MDI and CO, performed with -NCO/-OH molar ratios of 8:1 and 4:1, have led to suitable bitumen modifiers. Modification has been related to chemical reactions between -NCO groups, some bitumen compounds and air moisture (or added water), which gave rise to binders with enhanced resistance to permanent deformation. The results showed that a 2 wt.% of MDI-CO prepolymer leads to binders with higher viscosity than that corresponding to a 3 wt.% Styrene-Butadiene-Styrene (SBS) block copolymer, a polymer and concentration widely used in the paving industry. Furthermore, the resulting prepolymers are liquids that can be easily mixed with bitumen at 90 ºC, which significantly lowers the typical temperature used for commercial SBS-modified bitumen (about 180 ºC). This fact may represent energy savings, reduce bitumen oxidation and result in improvements of health and safety conditions during the product manufacture.However, if high processing temperatures are required, MDI-CO based modifiers have demonstrated much higher thermal stability than prepolymers derived from crude oil (e.g. based on polyethylene glycol). As a result, NCO-terminated prepolymers obtained from biomass-derived polyols (castor oil in this article) may become a promising alternative to the use of other petrochemicals in the paving industry.

show abstract

Modifications of Bitumen by Elastomer and Reactive Polymer—a Comparative Study

Cited by 51 publications

References 1 publication

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

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

Polymer modification of bitumen: Advances and challenges

Isocyanate-functionalized castor oil as a novel bitumen modifier

Contact Info

Product

Resources

About