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

Li, Peng; Zheng, Min; Wang, Fei; Che, Fa; Li, Hongyin; Qing-lei, MA; Wang, Yonghong

doi:10.1155/2017/7236153

Cited by 16 publications

(12 citation statements)

References 12 publications

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“…It can also be seen that the load response lag phenomenon is quite obvious when the loading frequency increases. This indicates that the Dynamic Modulus or strength of the asphalt mixture increases with an increment in the loading frequency [27]. The well-dispersed GNPs can provide support to asphalt by increasing the interaction and adhesion strengths within it [28].…”

Section: Dynamic Modulusmentioning

confidence: 96%

Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt

et al. 2019

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With the increase in the demand for bitumen, it has become essential for pavement engineers to ensure that construction of sustainable pavements occurs. For a complete analysis of the pavement, both its structural and functional performances are considered. In this study, a novel material (i.e., Graphene Nano-Platelets (GNPs)) has been used to enhance both of the types of pavements’ performances. Two percentages of GNPs (i.e., 2% and 4% by the weight of the binder) were used for the modification of asphalt binder in order to achieve the desired Performance Grade. GNPs were homogeneously dispersed in the asphalt binder, which was validated by Scanning Electron Microscope (SEM) images and a Hot Storage Stability Test. To analyze the structural performance of the GNPs-doped asphalt, its rheology, resistance to permanent deformation, resistance to moisture damage, and bitumen-aggregate adhesive bond strength were studied. For the analysis of the functional performance, the skid resistance and polishing effect were studied using a British Pendulum Skid Resistance Tester. The results showed that GNPs improved not only the rutting resistance of the pavement but also its durability. The high surface area of GNPs increases the pavement’s bonding strength and makes the asphalt binder stiffer. GNPs also provide nano-texture to the pavement, which enhances its skid resistance. Thus, we can recommend GNPs as an all-around modifier that could improve not only the structural performance but also the functional performance of asphalt pavements.

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Section: Dynamic Modulusmentioning

confidence: 96%

Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt

et al. 2019

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“…e results indicate that dynamic modulus of asphalt mixture decreases with the increase in temperature and decrease in loading frequency. is could be attributed to temperature-dependent behaviour of asphalt as the increase in temperature makes the asphalt soft, causing decrease in dynamic modulus [38]. Moreover, 9% BG-modified asphalt shows better performance at both temperatures and loading frequencies.…”

Section: Dynamic Modulus Testmentioning

confidence: 99%

Performance Evaluation of Bone Glue-Modified Asphalt

Ali

Ahmad

Adeel

et al. 2019

Advances in Materials Science and Engineering

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Asphalt is one of the primary materials that are extensively used by the pavement industry throughout the world. Its behaviour is highly dependent on the amount of loading and the level of temperature it is exposed to. Asphalt has been modified in the past with different additives to improve its high- or low-temperature properties. In Pakistan, temperature remains high for most of the time of the year; hence, asphalt binders with less susceptibility to higher temperatures are preferred for flexible pavements. Acids, polymers, fibers, and extenders have been used by the researchers to improve high-temperature performance of asphalt mixture. In the present study, a bio material derived from the animal waste, named as bone glue (BG), has been used with the 60/70 penetration grade binder in dosages of 3%, 6%, 9%, and 12% by weight of asphalt binder. The bone glue is produced from a sustainable source. It is a cost-effective and eco-friendly material. Moreover, it produces a durable and nonhazardous asphalt composite. The influence of addition of bone glue on asphalt binder was evaluated using different testing techniques which include consistency tests, rheological analysis, and adhesion tests. Furthermore, different performance tests were conducted on bone glue-modified asphalt mixtures. Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were carried out to ensure the homogeneity and proper mixing of bone glue in asphalt binder. The results from the tests reveal that bone glue stiffens the asphalt binder hence enhancing its high temperature performance. Bone glue dosage of 9% by weight of the binder was found to be the optimum dosage based on the rheological and performance analysis.

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“…Figure 6a,b show the relationship of dynamic modulus with loading frequency at 40 • C and 55 • C. As shown, the dynamic modulus of asphalt decreases with the decrease in loading frequency and increase in temperature. This is due the fact that asphalt is temperature-dependent and becomes soft with an increase in temperature which leads to a decrease in dynamic modulus [29]. Modified samples have greater values of dynamic modulus than the base asphalt samples.…”

Section: Effect Of Cbnps On Dynamic Modulus Of Asphaltmentioning

confidence: 99%

Performance Evaluation of Carbon Black Nano-Particle Reinforced Asphalt Mixture

et al. 2018

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Applications of nanotechnology in the pavement industry have increased rapidly during the last decade in order to enhance a pavement’s sustainability and durability. Conventional asphalt binder generally does not provide sufficient resistance against rutting at high temperatures. Carbon black nano-particles (CBNPs, produced by perennial mountain trees’ carbonization) were mixed into the performance grade (PG) 58 asphalt binder in this study. Conventional asphalt binder tests (penetration, ductility and softening point), frequency sweep, performance grading, and bitumen bond strength tests were conducted to study the enhancement in the properties of asphalt binder. Dynamic modulus and wheel tracking tests were also performed to investigate the effect of CBNPs on asphalt mixture properties. Experimental results demonstrated that preferred dosage of CBNPs in asphalt is 10% by weight of the bitumen. Results of scanning electron microscopy (SEM) and storage stability tests validated homogenous and stable dispersion of CBNPs in the asphalt binder. Asphalt mixtures became stiffer and resistant to rutting at high temperatures by addition of CBNPs in asphalt binder. Significant improvement in bitumen aggregate bond strength was also observed by incorporating CBNPs. It is concluded that CBNPs can be used to effectively enhance the high-temperature performance and consequently the sustainability of flexible pavements.

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

Cited by 16 publications

References 12 publications

Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt

Experimental Investigation into the Structural and Functional Performance of Graphene Nano-Platelet (GNP)-Doped Asphalt

Performance Evaluation of Bone Glue-Modified Asphalt

Performance Evaluation of Carbon Black Nano-Particle Reinforced Asphalt Mixture

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