The use of additives for the improvement of the mechanical behavior of high modulus asphalt mixes

Moreno-Navarro, Fernando; Sol-Sánchez, M.; Rubio-Gámez, M.C.; Segarra-Martínez, M.

doi:10.1016/j.conbuildmat.2014.07.115

Cited by 67 publications

(23 citation statements)

References 15 publications

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“…Due to its elastic response, the presence of these additives reduces the stress induced on the material under any load. is coincides with the results obtained in prior investigations, where the use of cellulose or polyester fibres reduced the rigidity of the asphalt mixture by making it more flexible, reaching values below 5000 MPa [18][19][20].…”

Section: Advances In Civil Engineeringsupporting

confidence: 91%

Effects of Recycled Polyethylene Terephthalate (PET) on Stiffness of Hot Asphalt Mixtures

Movilla-Quesada

Raposeiras

Olavarría

2019

Advances in Civil Engineering

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In recent years, Chile’s vehicle fleet has undergone great changes, with 25% growth in motor vehicles. This increase is directly related to improvements in the performance of flexible pavements, which make infrastructure less susceptible to permanent deformations and/or cracking at high and low temperatures, respectively. In 2016, the Ministry of the Environment passed the Law on Recycling and Accountability to promote the search for innovative ideas and materials in different sectors. This research focused on the experimental study of the mechanical behaviour of a mixture of hot asphalt, incorporating thick particles of polyethylene terephthalate (PET) from bottle recycling, using the Marshall stability and flow test and the resilience module (rigidity) test at 5°C and 22°C. Based on previous research, significant PET fibre sizes were used, increasing the optimum amount of polyethylene terephthalate from 6% to 14% in the mixture. The results show that incorporating this polymeric additive provides greater stability, in addition to an increase in resistance to permanent deformations and fatigue, compared to a “traditional” mixture.

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Section: Advances In Civil Engineeringsupporting

confidence: 91%

Effects of Recycled Polyethylene Terephthalate (PET) on Stiffness of Hot Asphalt Mixtures

Movilla-Quesada

Raposeiras

Olavarría

2019

Advances in Civil Engineering

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“…The mixing temperatures vary between 140 and 195 • C, with a digestion time between 20 min and 3 h and mixing speeds from 200 to 7200 rpm (Figure 3). On the other hand, for the dry process, GTR percentages vary between 1% and 10% of the total weight of the mixture (the most common being 1%) and the size of the particles range from 0.6 to 3.0 mm [73][74][75].…”

Section: Ground Tire Rubber (Gtr)mentioning

confidence: 99%

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

et al. 2019

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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.

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“…RA was asphalt compound modifier used as antirutting agent and had stability properties as shown in Figure 1(c). ZQ additive [12], originated in China, was a high modulus additive aimed at reducing rutting, as shown in Figure 1(d). The additives were used according to dry process, meaning that additive was dry-mixed with hot aggregate and then fixed with asphalt.…”

Section: Additivesmentioning

confidence: 99%

Laboratory Performance Evaluation of High Modulus Asphalt Concrete Modified with Different Additives

Zheng

Wang

et al. 2017

Advances in Materials Science and Engineering

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The objective of this study is to evaluate comprehensive performance of high modulus asphalt concrete (HMAC) and propose common values for establishing evaluation system. Three gradations with different modifiers were conducted to study the high and low temperature performance, shearing behavior, and water stability. The laboratory tests for HMAC included static and dynamic modulus tests, rutting test, uniaxial penetration test, bending test, and immersion Marshall test. Dynamic modulus test results showed that modifier can improve the static modulus and the improvements were remarkable at higher temperature. Moreover, modulus of HMAC-20 was better than those of HMAC-16 and HMAC-25. The results of performance test indicated that HMAC has good performance to resist high temperature rutting, and the resistances of the HMAC-20 and HMAC-25 against rutting were better than that of HMAC-16. Then, the common values of dynamic stability were recommended. Furthermore, common values of HMAC performance were established based on pavement performance tests.

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The use of additives for the improvement of the mechanical behavior of high modulus asphalt mixes

Cited by 67 publications

References 15 publications

Effects of Recycled Polyethylene Terephthalate (PET) on Stiffness of Hot Asphalt Mixtures

Effects of Recycled Polyethylene Terephthalate (PET) on Stiffness of Hot Asphalt Mixtures

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

Laboratory Performance Evaluation of High Modulus Asphalt Concrete Modified with Different Additives

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