Improvement of Local Asphalt Concrete Binders Using Crumb Rubber

Msallam, Majed; Ibrahim, Azmi

doi:10.1061/(asce)mt.1943-5533.0002238

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…They found that the addition of RAP contributes to the stiffening nature of CRM binder. Msallam and Asi [37] proved that the use of crumb rubber as an additive to asphalt cement was clearly effective in enhancing the performance of modified HMA mixes.…”

Section: Introductionmentioning

confidence: 99%

A study on the significance of the crumb rubber classification on the ductility test for rubberized asphalt binder

AlJaberi

2019

SN Appl. Sci.

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Several types of modifiers have been used as additives into asphalt cement in order to enhance the performance of the Hot Mix Asphalt for road pavements such as PVA, SBS and crumb rubber. The aim of the present work is to study the effect of the crumb rubber classification according to the size of scrap tires, i.e., car and truck tires, on the behavior of the modified asphalt ductility test and Marshall mechanical properties of the asphalt concrete specimens. Samples of asphalt cement had been modified by using two types of crumb rubber: car crumb rubber (CCR) and truck crumb rubber (TCR). Mixing temperature (150-180 °C), contact time (20-60 min), CCR (10-20 wt%) and TCR (0-4 wt%) were tested to establish the mathematical correlations of the ductility response using a central composite design rotatable and uniform. Minitab-17 was performed for the regression and the graphical analysis of the obtained results. The optimum values of the operating variables that give (24 cm) of ductility response were (180 °C) of mixing temperature, (21 min) of contact time, (18 wt%) of CCR and (3.5 wt%) of TCR. The results showed an obvious enhancement of Marshall stability and flow according to these optimum values, 13 kN and 4 mm, respectively, in comparison with the unmodified binder in spite of minimizing the ductility value.

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Section: Introductionmentioning

confidence: 99%

A study on the significance of the crumb rubber classification on the ductility test for rubberized asphalt binder

AlJaberi

2019

SN Appl. Sci.

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“…However, it has been found that some of the key mechanical properties of concrete, including workability, compressive strength, tensile strength, stiffness, and modulus of elasticity, are significantly reduced when rubber is added to concrete [7][8][9]. Because road materials require a lower modulus of elasticity to improve the comfort of vehicle occupants, the decline in these properties makes recycled rubber concrete (RRC) an ideal road material [10,11]. Furthermore, RRC has a higher energy dissipation capacity than ordinary concrete, which makes it more resistant to vehicle impact loads as a road material [12,13].…”

Section: Introductionmentioning

confidence: 99%

Combined Effects of Steel and Glass Fibres on the Fracture Performance of Recycled Rubber Concrete

Li,

Pan,

Zhen

et al. 2024

Buildings

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As an environmentally friendly construction material, recycled rubber concrete (RRC) is commonly used as a road material owing to its excellent flexural strength and crack resistance. Previous studies have shown that the addition of fibres is an effective method for improving the crack resistance of concrete. The purpose of this study is to investigate the fracture performance of RRC reinforced with steel fibres (SFs) and glass fibres (GFs). A total of 28 RRC mixtures were prepared. The results of the fracture test showed that the addition of SFs and GFs significantly enhanced the RRC fracture performance. The maximum increases or decreases in flexural strength, brittleness coefficient, fracture energy, initial fracture toughness, and unstable fracture toughness were 64.9, −34.6, 775.6, 92.0, and 118.4%, respectively. The ideal GF content is usually in the range of 0.4–0.6% and decreases with increasing SF content. In addition, scanning electron microscope (SEM) tests were conducted to explore the mechanism of the effect of hybrid fibres on RRC at a microscopic level. The results show that SFs were always pulled out, while GFs were pulled apart at the initial defects. At the same time, excessive GFs caused more initial defects. These results are expected to provide theoretical direction and experimental support for the practical application of hybrid fibre-reinforced recycled rubber concrete (HFRRRC).

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“…On the other hand, the use of recycled rubber tire grain modified (RRC) asphalts in asphalt mixtures contributes to improving technical aspects of pavement and the development of environmental practices in pavement engineering. On the technical side, incorporating GCRmodified asphalt into the asphalt mix increases resistance to fatigue and aging, as well as reduces permanent deformation [37] - [41]. On the environmental side, the use of GCR as an asphalt modifying material is considered a form of final and environmentally sound disposal of large quantities of used tyres.…”

Section: Introductionmentioning

confidence: 99%

Behavior of a draining mixture composed by recycled concrete aggregates and rubberized asphalt concrete

et al. 2020

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Concrete waste is considered an environmental liability with a negative impact. However, this type of waste presents a high potential to be used as an alternative building material. Therefore, the present study aims to evaluate the applicability of substituting the conventional natural stone aggregate (CA) of a draining asphalt mixture (MD) by a recycled concrete aggregate (RCA). Firstly, RCA was physically characterized to be compared with the AC. Then, two MD mixtures were design with rubberized asphalt concrete (GCR by its spanish acronym): one using the conventional aggregate (control sample) and one with the RCA substituting entirely the CA. Experimental tests under monotonic load (indirect tensile strength - RTI) were conducted over the mixtures, as well as adhesion tests (susceptibility of RTI in wet and dry conditions and abrasion wear Cantabro). The results indicate that for MD mixtures with RCA, a higher content of asphalt is required than with CA. Additionally, it wasfound that the presence of higher asphalt content in MD-RCA mixtures increases its adhesion when compared with the control sample. Therefore, it can be concluded that the use the RCA for MD mixtures, in the proposed way, is technically and environmentally viable.

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Improvement of Local Asphalt Concrete Binders Using Crumb Rubber

Cited by 12 publications

References 18 publications

A study on the significance of the crumb rubber classification on the ductility test for rubberized asphalt binder

A study on the significance of the crumb rubber classification on the ductility test for rubberized asphalt binder

Combined Effects of Steel and Glass Fibres on the Fracture Performance of Recycled Rubber Concrete

Behavior of a draining mixture composed by recycled concrete aggregates and rubberized asphalt concrete

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