Improvement of permeable asphalt pavement by adding crumb rubber waste

Hussein, Safa A.; Al-Khafaji, Zainab S.; Alfatlawi, Thair Jabbar Mizhir; Abbood, Abdul-Kareem N.

doi:10.1515/eng-2022-0345

Cited by 12 publications

(3 citation statements)

References 12 publications

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“…In the wet process, crumb rubber typically acts as an asphalt cement modifier to improve the rheological properties of asphalt binder. while in the dry process, crumb rubber is used to modify bitumen or as a partial substitute for aggregates (Lim et al, 2021;Riekstins et al, 2021;Hussein et al, 2022;Li et al, 2022). Both technologies can play an important role for the circular economy by reducing resource consumption and by alleviating environmental pollution, however, their application is part of a long ongoing debate around the safety of crumbed rubber and the potential release of carcinogenic substances used during the tire manufacture, such as antioxidants and antiozonants as well as polycyclic aromatic hydrocarbons (PAHs), into the environment.…”

Section: Waste Rubber Collection and Traditional Recovery Optionsmentioning

confidence: 99%

The value of different recycling technologies for waste rubber tires in the circular economy—A review

Goevert

2024

Front. Sustain.

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The issue of used rubber tires is becoming an ever-greater problem for the environment. Often these are disposed of in an illegal manner. Whether on forest paths, fields, or other unsuitable areas—illegal disposal of used tires is a punishable offense and a risk to people and the environment. Nevertheless, the number of cases increases from year to year. This is partly caused by the lack of suitable recycling options for waste tires. Reuse does take place but mainly in the form of downcycling, with the majority currently either being incinerated for energy recovery or, as shredded tires, used as substrate or filler material in roads and sporting grounds. Several reclamation technologies have been developed in the past, using for example mechanical, thermal energy and/or chemicals, aiming to provide a better solution to the waste tire problem, however, most processes cause some form of rubber degradation that limits reuse to low value applications. Only devulcanisation using a biotechnological approach with microorganisms and/or enzymes shows currently promise to reuse waste rubber for high value applications such as new tires. This review provides an overview of the technological development of different recycling options and their potential benefit to the circular economy.

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Section: Waste Rubber Collection and Traditional Recovery Optionsmentioning

confidence: 99%

The value of different recycling technologies for waste rubber tires in the circular economy—A review

Goevert

2024

Front. Sustain.

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“…Fatigue cracking, known as the first type of crack, is most commonly induced by traffic loads. Similar to the first type of fracture, the second type of fracture (also known as thermal cracking or shrinkage cracking) is caused by environmental pressures [20].…”

Section: Its Testmentioning

confidence: 99%

Enhancing Stone Mastic Asphalt through the Integration of Waste Paper and Cement Kiln Dust

Naser,

Seyedi,

Al-Busaltan

2023

JCHE

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In the realm of civil engineering and industrial construction, the infusion of waste materials into road pavements has emerged as a pivotal strategy for augmenting the attributes of asphalt mixtures while concurrently mitigating the environmental repercussions associated with waste. This investigation delineates a dry method for the preliminary treatment of waste paper, preceding its amalgamation into asphalt mixtures. The focal point is the incorporation of waste paper and Cement Kiln Dust (CKD) as modifiers in Stone Mastic Asphalt (SMA). It is posited that the inclusion of waste paper fibers can substantially elevate the SMA's flexibility and crack resistance. Simultaneously, CKD is purported to bolster the asphalt's strength and durability through its cementitious characteristics. A series of SMA blends were formulated, integrating waste paper and CKD in varied proportions ranging from 0.2% to 1% by weight. Subsequent evaluations encompassed analyses of air voids, density, drain-down characteristics, Indirect Tensile Strength (ITS), and Marshall Stability. The outcomes revealed that the drain-down test exhibited enhancements in volumetric parameters, notably density and air voids. Concomitantly, there was a 33% increase in Marshall Stability and a 37% improvement in ITS. Additional advancements were observed in Marshall Flow, Tensile Strength Ratio (TSR), and skid resistance. In summation, this study establishes that waste paper, when appropriately treated and amalgamated with CKD, can be efficaciously utilized in SMA mixes, yielding mixtures with superior volumetric and mechanical properties. This methodology not only augments the stiffness and minimizes binder drainage but also enhances rutting resistance. Most crucially, it paves the way for sustainable and ethical practices in the reuse and recycling of waste materials.

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“…By infiltration, brief detention, and some stormwater evaporation, the quantity is controlled. Various procedures, such as stormwater collection, filtering, sorption, and biodegradation, are used to maintain quality [1].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of 45° and 90° Herringboned Permeable Interlocking Concrete Pavement

Shubbar

Nasr

Kadhim³

et al. 2023

Infrastructures

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Pavement deterioration is mainly caused by high traffic loading and by increased levels of runoff water resulting from storms, floods, or other reasons. Consequently, this issue can be efficiently solved by employing permeable pavement, such as permeable interlocking concrete pavement (PICP) to control water runoff and endure increased traffic loads. This study investigates the performance of PICP, in both 45° and 90° herringboned surface patterns, in terms of the infiltration of volumes of water, runoff water volumes, and the ability of pavement to withstand static loading. All the related tests in this study were implemented using a lab apparatus that was fabricated as a simulator for rainfall. Various conditions were adopted during the performance tests, including the application of longitudinal slopes (0, 2.5, 5, and 7.5%), side slopes (0, 2.5, and 5%), and different rainfall intensities (25, 50, 75, and 100 L/min). The results indicated that at high rainfall intensities (75 and 100 L/min), PICP with the 45° herringboned surface pattern had the highest volume of infiltrated water and the lowest runoff water at all the adopted longitudinal and side slopes. In addition, PICP with the 45° herringboned surface pattern showed higher resistance to deflection under a static loading test than the 90° herringboned pattern under the same conditions. Therefore, PICP with a 45° herringboned surface pattern showed supremacy in terms of runoff reduction and load resistance in comparison to PICP with a 90° herringboned pattern. Even though there are differences between the two types of PICP, they are both strongly recommended as alternatives to regular pavement.

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Improvement of permeable asphalt pavement by adding crumb rubber waste

Cited by 12 publications

References 12 publications

The value of different recycling technologies for waste rubber tires in the circular economy—A review

The value of different recycling technologies for waste rubber tires in the circular economy—A review

Enhancing Stone Mastic Asphalt through the Integration of Waste Paper and Cement Kiln Dust

Performance Comparison of 45° and 90° Herringboned Permeable Interlocking Concrete Pavement

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