The low temperature properties of conventional and modified asphalt binders evaluated by the failure energy and secant modulus from direct tension tests

Ho, S; Zanzotto, Ludo

doi:10.1007/bf02480586

Cited by 20 publications

(2 citation statements)

References 4 publications

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“…Using SBS copolymers in binder modification has various tangible benefits. SBS-modified asphalt binders have exhibited satisfactory performance against permanent deformation at high temperatures [141,[153][154][155][156][157], fatigue cracking [158][159][160], and thermal cracking at low temperatures [160][161][162][163]. Additionally, HMAs produced with SBS copolymer demonstrated better resistance to moisture damage [164,165].…”

Section: Thermoplastic Elastomersmentioning

confidence: 99%

A Comprehensive Literature Review on Polymer-Modified Asphalt Binder

Emtiaz,

Imtiyaz,

Majumder

et al. 2023

CivilEng

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Due to periodic variations in temperature and heavy traffic loading, hot-mix asphalt (HMA) pavements undergo considerable distress during their service life. The rheological properties of asphalt binder, when subjected to complex physical and chemical processes, make it stiff and sometimes brittle, which ultimately plays a huge part in pavement deterioration. This phenomenon is commonly known as asphalt aging. Incorporating polymer modifiers with virgin asphalt can work as an effective means to change the binder properties and alleviate the issues related to asphalt aging. Different types of polymers, including elastomers, plastomers, and reactive polymers, can mixed in different combinations with the virgin asphalt to create polymer-modified binders (PMBs). In general, polymers are typically added to the virgin asphalt binder in PMB manufacturing at weight percentages ranging from 3% to 7%. Previous research suggests that many polymer-modified binders (PMBs) show great resiliency and perform extremely well during field and laboratory testing, although the complex nature of asphalt itself makes it significantly difficult to understand the relationship and compatibility of the asphalt–polymer system. This paper aims to develop a comprehensive literature review on the chemical aspects, microscopic structure, and compatibility of polymers with virgin asphalt. It was found that swelling, storage stability, blend morphology, and the polymer mixing technique play a great role in the compatibility of asphalt–polymer systems. Thermoplastic elastomers (e.g., styrene–butadiene–styrene) and plastomers (e.g., ethylene–vinyl acetate) are the most used polymer modifiers for asphalt binders. The compatibility of the polymer–asphalt system can be improved by sulfur vulcanization, antioxidants, hydrophobic clay minerals, functionalization, and reactive polymers, among other techniques.

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Section: Thermoplastic Elastomersmentioning

confidence: 99%

A Comprehensive Literature Review on Polymer-Modified Asphalt Binder

Emtiaz,

Imtiyaz,

Majumder

et al. 2023

CivilEng

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“…Ho et al [37,38] found that the BBR test has difficulties in recognizing the true impact of modifiers on low temperature properties. The low service temperatures of modified asphalts determined by BBR were on average 3 to 6 • C higher than those determined by DTT.…”

Section: Superpave Binder Specificationmentioning

confidence: 99%

Mechanism and Development of Thermo-Rheological Properties of Asphalts Modified by Reactive Polymer Systems

Jasso,

Perez Jaimes,

Tellez Vega

2023

Materials

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The new class of reactive polymers is designed to modify asphalt through chemical reactions with asphalt components. The complexity of such systems and the long experience with thermoplastic elastomers as well as with some other “classical” modifiers, and to a degree that our present testing methods and even specifications revolve around these materials, might obscure the fact that we are dealing with rather different modification systems and possibly with new emerging asphalt paving technologies. Our present work attempted to compare two different reactive polymer systems with the “classical” system which uses thermoplastic elastomer. The impact of reactive polymer systems on asphalt was studied through material properties manifested by specification tests and through the development of thermo-rheological properties in linear and non-linear viscoelastic regions. As expected, the behavior of reactive polymeric systems with different chemistries also differed among themselves. The available results showed that the reactive groups of polymers react with polar components of asphalt leading to higher stiffness at elevated pavement temperatures and differing impact on low temperature properties. The data point to a significantly improved resistance to plastic deformation of pavement in the case of reactive polymers, despite the fact that elastic recovery-based specification tests failed to identify this improvement.

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