New Study on Improved Performance of Paving Asphalts by Crumb Rubber and Polyethylene Modification

Sulyman, Mohamed; Sienkiewicz, Maciej; Haponiuk, Józef T.

doi:10.4172/2169-0022.1000133

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…Modifications of asphalt aim to enhance both the life time and performance of pavements, Thereby they provide advantage for both the environment and economic sectors [1]. Polymer modified bitumen's (PMBs) are mixture of polymer with asphalt by means of two main common approaches, the first one is the mechanical mixing, the second one is chemical reactions [2].…”

Section: Introductionmentioning

confidence: 99%

Evaluation the Effect of Waste Low-Density Polythlene and Crumbrubber on Phsical Properties of Asphalt

Almaali

Al-Busaltan²

2020

JEASD

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Nowadays, Polymer Modified Binder (PMB) is necessary due to its valuable characteristics on asphalt pavement layers with increase in traffic volume and loads. However, current trend in asphalt modification is prefer the waste and by product materials for ensuring the sustainability and cost effectiveness. Therefore, to analyze the effect of waste Crumb Rubber Modifier (CRM) and waste Low-Density Polyethylene (LDPE) on the asphalt binders’ physical properties, CRM/LDPE modified asphalts with different contents were prepared and investigated in this study. Measured physical characteristics were softening point, penetration, ductility and viscosity tests. Conversions of CRM and waste LDPE to functional materials have been introduced in this research study as a practical approach to improve the asphalt binder’s physical properties. CRM and LDPE in the form of fine having a particle size under 250 µm were used as additives to liquid asphalt, individually and collectively by weight of virgin asphalt, i.e., (5.0%, 15.0% and 25.0% of CRM) and (2.5. %, 5.0%, 7.5% and 10.0% of LDPE), after mixed with CRM and LDPE, the asphalts showed decrease in penetration, increase in softening point and rotational viscosity. This referring that both intermediate and high temperature rheological characteristics of the asphalts have been improved by the modification of waste CRM and LDPE, because that mean the stiffness of asphalt binder increases when changing these characteristics and Thus, the asphalt mixture will become more stiff and resistant to possible failures, the Physical properties of the CRM or LDPE modified asphalts are largely dependent on the waste CRM or LDPE content, and many other enhanced characteristics of the mechanical aspect can be targeted using the composite of both CRM and LDPE. However, such result confirms the validity of waste polymer in modifying the asphalt binder.

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Section: Introductionmentioning

confidence: 99%

Evaluation the Effect of Waste Low-Density Polythlene and Crumbrubber on Phsical Properties of Asphalt

Almaali

Al-Busaltan²

2020

JEASD

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“…For TPB-PET blends, the 2% PET concentration for the 0.85 mm to 1.18 mm particle size range provided the best fatigue cracking resistance, whereas the particle size range 0.60 mm to 0.85 mm produced the best rutting resistance. The performance enhancing effect observed by the addition of PET in asphaltic binder materials was also observed when crumb rubber (CR) was used as a modifier improving durability, rutting resistance, skid resistance and crack reflection properties [23] [24]. Of notable interest, a study investigating the effect of particle size and concentration of crumb rubber (CR) on the rutting and fatigue cracking resistance in TLA and TPB showed that to minimize fatigue cracking, the optimum particle size for TLA was that of >500 mm to 710 mm, and for TPB >500 mm to 710 mm with a 2% crumb rubber addition [25].…”

Section: Introductionmentioning

confidence: 99%

Performance of Waste Polymer Modified Road Paving Materials

Maharaj

Hosein

2018

Progress in Rubber, Plastics and Recycling Technology

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The reuse of waste crumb rubber (CR) (used tyres) and Polyethylene Terephthalate (PET) (plastic beverage bottles) is of particular interest in Trinidad and Tobago since present disposal techniques presents environmental and health challenges. The results of this study investigating the influence of PET and CR on the performance characteristics of the HMA2 pavement design using Trinidad Lake Asphalt (TLA) and Trinidad Petroleum Bitumen (TPB) filled an information gap as no previous studies utilizing these indigenous asphaltic materials exist. Existing information using asphaltic materials other than TLA and TPB are irrelevant as variations in performance characteristics due to the addition of polymeric additives can vary from asphalt to asphalt due to differences in source and chemical composition of the parent binder. The results of this study show that a 6% CR and PET addition achieved the highest performance advantage demonstrated by an increase in the Marshall Quotient of between 21–22% and an insignificant decrease in the Bulk Specific Gravity (0.2%) compared to the unmodified blend. The improvement in the mechanical properties and the performance of the modified pavement materials observed is evidence of the useful effects of these waste materials in road paving design and offer a beneficial strategy for the reuse of these waste materials.

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“…27 Another study found that CR particles of size 0.8 mm intensified the asphalt's viscosity from 1 dPAS at 3% CR addition to 10 dPas at 15% and surface durability proved more superior and the temperature variations proved less threatening to the road pavements. 28 A recent study demonstrated that road-paving bitumen penetration 60/70 blends mixed with 20% CR displayed better physical properties including indirect tensile modulus and creep compared to the standard unmodified bitumen only. 29 A literature review of research involving the effect of CR and PET on the mechanical properties of TLA and TPB yielded limited results as studies encountered focused mainly on the flow properties of modified blends.…”

Section: Introductionmentioning

confidence: 99%

The performance and durability of polyethylene terephthalate and crumb rubber–modified road pavement surfaces

Maharaj

Mahase

2018

Progress in Rubber, Plastics and Recycling Technology

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This research investigates the influence of waste polymeric polyethylene terephthalate (PET) materials obtained from waste plastic bottles and crumb rubber (CR) obtained from used automobile tyres on the performance (Marshall stability, flow and compression) and durability (weathering) characteristics of road-paving material made from Trinidad Petroleum Bitumen and the world-renowned Trinidad Lake Asphalt. Apart from possibly serving as additives to improve performance, incorporating waste PET and CR in asphaltic road-paving materials also offers a viable means of alleviating health and environmental problems associated with the waste disposal of PET and CR. The results of the Marshall testing found that the optimum dosage for polymer modification was 1.0% and 5.0% for PET and CR polymers, respectively. In comparison with a Marshall stability value for the unmodified asphalt sample of 10.2 kN with a corresponding flow value of 3.1 mm, the 5% PET modified sample had a Marshall stability value of 10.2 kN with a flow value of 3.2 mm, while the CR modified sample recorded the highest Marshall stability value of 10.7 kN at corresponding flow value of 2.8 mm. An undesirable trend of the gradual increasing of the voids in mineral aggregate (VMA) with incremental increases in the % of added PET and CR was observed; however, for all the modified specimens with the exception of the 5% PET modified sample, the VMA fell within the acceptable range of between 14% and 20%. The results of accelerated weathering and compression testing demonstrated that both the 1% PET and the 5% CR-modified samples had higher durability and compressive strength characteristics than the unmodified samples. Compressive stress values for the polymer-modified specimens were in excess of 45% compared to the unmodified ones. The relevance of the values obtained in this study cannot be ignored as it provides practical and essential data, especially of the optimal dosages of PET and CR required for the enhancement of the mechanical and durability properties of the Trinidad road-paving materials while simultaneously providing an environmentally desirable and sustainable method for reusing these waste polymers. Commercial application of the optimum formulation can be immediately implemented.

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New Study on Improved Performance of Paving Asphalts by Crumb Rubber and Polyethylene Modification

Cited by 7 publications

References 20 publications

Evaluation the Effect of Waste Low-Density Polythlene and Crumbrubber on Phsical Properties of Asphalt

Evaluation the Effect of Waste Low-Density Polythlene and Crumbrubber on Phsical Properties of Asphalt

Performance of Waste Polymer Modified Road Paving Materials

The performance and durability of polyethylene terephthalate and crumb rubber–modified road pavement surfaces

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