Determination of Construction Temperatures of Crumb Rubber Modified Bitumen Mixture Based on CRMB Mastic

Li, Yanan; Lyu, Yuchao; Xu, Minmin; Fan, Liang; Zhang, Yuzhen

doi:10.3390/ma12233851

Cited by 10 publications

(7 citation statements)

References 12 publications

(11 reference statements)

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“…CR tends to provide asphalt mixtures with similar benefits as SBS and SBR polymers, but at higher doses and with the advantage that it has a positive impact on the environment as described above but is sensitive to decomposition and the absorption of oxygen [ 11 , 13 ]. As is well known, the addition of CR in asphalt binders implies an increase in the viscosity of the asphalt binders, which translates into higher production temperatures, generating a negative impact on the environment [ 9 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Rheological Behaviour of WMA-Modified Asphalt Binders with Crumb Rubber

et al. 2022

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Crumb rubber (CR) is one of the materials most widely used in the road infrastructure industry due to its mechanical and environmental benefits as an asphalt binder modifier. Nonetheless, CR decreases the workability of mixes by increasing the viscosity of the binder, leading to an increase in the production temperatures of asphalt mixes. However, warm mix technologies can reduce the temperature demand associated with these processes. The preceding explains the growing interest in producing rubberised asphalt binders incorporating warm mix asphalt (WMA) additives. In this research, the mechanical and rheological properties of a 60/70 penetration grade asphalt binder modified with CR (at a dosage of 15, 18 and 21% by the wet process) and WMA chemical additives (Evotherm M1 and Iterlow T) were investigated. Laboratory tests included penetration, softening point, rotational viscosity, frequency sweep through dynamic shear rheometer (DSR), and multiple stress creep recovery (MSCR) tests. The results indicate that CR increases the stiffness of the asphalt binder, which is reflected in a lower penetration grade and improved softening point. It also improves its rutting resistance but decreases fatigue performance. Furthermore, it has been shown that under the conditions studied, the higher the CR content, the more elevated the degree of stiffness and performance of the asphalt binder. On the other hand, WMA technology decreases asphalt stiffness and performance at high temperatures.

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Section: Introductionmentioning

confidence: 99%

Rheological Behaviour of WMA-Modified Asphalt Binders with Crumb Rubber

et al. 2022

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“…Like plastic products, waste tires are difficult to degrade and do not disappear naturally after being buried underground for decades, causing a phenomenon known as "black pollution". Therefore, the effective recovery and reuse of waste rubber to reduce environmental pollution can make important contributions to the construction of an eco-friendly society [1]. EPUC (EPUC) is a composite material mixed with one component or two component Polyurethane as the binder, cement sand as the filler aggregate and mixed with a certain proportion of rubber particles.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites

Jia

Sun

et al. 2021

Materials

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In order to solve issues related to bridge girders, expansion devices and road surfaces, as well as other structures that are prone to fatigue failure, a kind of fatigue-resistant elastic polyurethane concrete (EPUC) was obtained by adding waste rubber particles (40 mesh with 10% fine aggregate volume replacement rate) to conventional engineering polyurethane concrete (PUC). Based on the preparation and properties of EPUC, its constitutive relation was proposed through compression and tensile tests; then, a scanning electron microscope (SEM), an atomic force microscope (AFM) and a 3D non-contact surface profilometer were used to study the failure morphology and micromechanisms of EPUC. On this basis, four-point bending fatigue tests of EPUC were carried out at different temperature levels (−20 °C, 0 °C, 20 °C) and different strain levels (400 με~1200 με). These were used to analyze the stiffness modulus, hysteresis angle and dissipated energy of EPUC, and our results outline the fatigue life prediction models of EPUC at different temperatures. The results show that the addition of rubber particles fills the interior of EPUC with tiny elastic structures and effectively optimizes the interface bonding between aggregate and polyurethane. In addition, EPUC has good mechanical properties and excellent fatigue resistance; the fatigue life of EPUC at a room temperature of 600 με can grow by more than two million times, and it also has a longer service life and reduced disease frequency, as well as fewer maintenance requirements. This paper will provide a theoretical and design basis for the fatigue resistance design and engineering application of building materials. Meanwhile, the new EPUC material has broad application potential in terms of roads, bridges and green buildings.

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“…However, it was demonstrated in a study circa 2019 that the viscosity of the CR-modified asphalt, including the mixing temperature and compaction temperature, is based on the viscosity of the CR-modified from the viscosity-temperature curves. Based on the Chinese standard JTG E20-2011, it is recommended that the viscosity range of the CR-modified asphalt in the mixing and compaction process should be 2.7 ± 0.2 Pa.s and 3.9 ± 0.3 Pa.s, respectively [99].…”

Section: Compaction Of Cr-modified Asphaltmentioning

confidence: 99%

A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier

Milad

Ahmeda²,

Taib

et al. 2020

J Rubber Res

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The use of recycled crumb rubber (CR) in asphalt pavements could be an essential step towards ensuring a more sustainable future in addition to opening a new investment opportunity for global investors. Asphalt modifiers have the ability to enhance the performance of flexible pavements and contribute towards ensuring a more sustainable environment. The utilization of CR produced from end-of-life tires (ELTs) as an asphalt modifier has been shown to enhance asphalt performance with regard to high-temperature rutting and low-temperature thermal cracking due to the remarkable characteristics of the CR. This paper presents the findings of previous studies, including the grinding of ELTs to obtain crumb rubber, the technology employed in the process, and the physical and mechanical properties of the asphalt modifiers. Even though the present study focuses on the application of hot-mix asphalt (HMA), there are other methods, for instance, warm-mix asphalt (WMA), reclaimed asphalt pavement (RAP), and porous asphalt, that used CR as a modifier or as an additive in asphalt binders. A review of the literature suggests that most CR have a good performance and are suitable for use in the top paving layer to reduce noise as well as for other applications.

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Determination of Construction Temperatures of Crumb Rubber Modified Bitumen Mixture Based on CRMB Mastic

Cited by 10 publications

References 12 publications

Rheological Behaviour of WMA-Modified Asphalt Binders with Crumb Rubber

Rheological Behaviour of WMA-Modified Asphalt Binders with Crumb Rubber

Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites

A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier

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