Performance of asphalt binder blended with non-modified and polymer-modified nanoclay

Yao, Hui; You, Zhanping; Li, Liang; Shi, Xianming; Goh, Shu Wei; Mills-Beale, Julian; Wingard, David

doi:10.1016/j.conbuildmat.2012.02.056

Cited by 152 publications

(76 citation statements)

References 22 publications

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“…This is an important means to prolong the service life of asphalt pavement. At present, the common asphalt modifier can be divided into the polymer-modified material and the inorganic modified material [6][7][8][9][10][11][12][13][14]. By the inorganic modified material utilization such as diatomite and basalt fiber as the modifier, not only the asphalt performance could be enhanced, but also the polymer modifier pollution to the environment could be avoided.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

Cheng

Zhu

Tan

et al. 2017

Advances in Materials Science and Engineering

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In order to improve the performance of asphalt mastic, some researchers have added diatomite or basalt fiber as a modifier to the asphalt mastic, and the results show that some properties of the asphalt mastic were improved. For the simultaneous addition of diatomite and basalt fiber, two kinds of modifier, compound modified asphalt mastic had not been reported; in this paper, thirteen groups of diatomite and basalt fiber (DBFCMAM) compound modified asphalt mastic with different content were prepared to study the performance. Softening point, cone penetration, viscosity, and DSR tests were conducted, for the high temperature performance evaluation of DBFCMAM, whereas force ductility and BBR tests were used in the low temperature performance study of the DBFCMAM. The results demonstrated that the high temperature performance of DBFCMAM was increased; moreover, the low temperature performance of DBFCMAM improved by diatomite and basalt fiber according to the results of the force ductility test; however, the conclusion of the BBR test data was inconsistent with the force ductility test. In summary, the high temperature and low temperature properties of DBFCMAM had been improved.

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Section: Introductionmentioning

confidence: 99%

Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

Cheng

Zhu

Tan

et al. 2017

Advances in Materials Science and Engineering

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“…To modify the bitumen with nanoclay, a high shear mixer was selected. Using this mixer an intercalated or an exfoliated structure can be obtained [2,16,17,18]. The layer separations in the nanoclay result in higher surface work which intensives the interaction with the asphalt binder ( Figure 2).…”

Section: Methodsmentioning

confidence: 99%

The influence of nanoclay on the durability properties of asphalt mixtures for top and base layers

Blom

Kinder

Meeusen

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. To avoid traffic congestion, due to road works, a continuous research into asphalt pavement and especially its durability is of great importance. This research focuses on improving the mechanical performance and the durability of asphalt mixtures by nanoclay modified bitumen. This promising technique of introducing nanoclays or nano particles into bitumen could offer an significant improvement on the fatigue properties and rutting performance and thus the durability of the asphalt top layer. IntroductionFor the heavely used "congested" Belgian road network, a continuous research into asphalt pavement and especially its durability is of great importance to avoid traffic congestion, due to road works.This research focuses on improving the mechanical performance and the durability of asphalt mixtures by nanoclay modified bitumen. A specific asphalt mixture type for base layers in Flanders, AC 14 base 35/50 (EN 13108-1), using a relatively hard bitumen was modified. Both physical and rheological properties of the modified binder were evaluated. This included the determination of the penetration and softening point and the characterization of dynamic rheological parameters, by using a Dynamic Shear Rheometer (DSR).The prefix 'nano' indicates the occurrence of a material that measures less than 100 nm, in at least one dimension. From literature, general trends on organic montmorillonite nanoclay (OMMT) modified bitumen can be derived. It is indicated that the penetration decreases and the softening point increases by adding nanoclays [1,2,3,4,5,6]. An explanation can be found by the reinforcement effect of the silicate layers on the bitumen [7]. Based on tests with a DSR, the bitumen seems to become more elastic and stiffer [2,8,9,10,11]. This effect is more pronounced at high temperatures and/or low frequencies. The viscosity increases also after the OMMT modification [2,6,8,9,12]. The indirect tensile strength does not change at 5°C and 25°C but does improve at 40°C [1,2,5,12]. In addition, nanoclay can form a barrier in bitumen through which penetration of oxygen and water is prevented [2]. The effects of the modification by nanoclay are more pronounced by increasing the amount or when using soft bitumen. Nevertheless, there is still a need for sufficient research on the use of nano-modified bitumen in asphalt. Especially as there are almost no research publications regarding the application of nanoclay in harder bitumen, a type which is preferably used in Belgian mixtures to provide rutting, though cracking must be avoided. This exploratory study will evaluate physical and rheological properties of a harder bitumen modified with nanoclay. Additionally, the

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“…However, a decrease in viscosity and complex shear modulus was observed when polymer modified nanoclay was added to base asphalt. Furthermore, polymer modified nano-clay showed to improve rutting and fatigue cracking resistance of asphalt binder (Yao et al, 2012). Nazzal et al (2013) observed the fundamental characterization of asphalt clay nanocomposites, which indicated that when nano-clay is added to asphalt binder, its adhesive forces are enhanced significantly while having an adverse effect on the cohesive forces.…”

Section: Introductionmentioning

confidence: 99%

“…Increasing the nano-clay concentration in asphalt binder mixtures enhances the temperature susceptibility as well as increases the complex modulus and dspacing, while decreasing the phase angle (Abdelrahman et al, 2014). Yao et al (2012) used polymer and nano-clay at concentrations of 2 and 4% respectively in an effort to reduce the oxidative aging of specific asphalt ). An increase in viscosity and complex shear modulus was observed when nonmodified nano-clay was added to the base asphalt.…”

Section: Introductionmentioning

confidence: 99%

Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design

Walters¹,

Begum²,

Fini³

et al. 2015

American Journal of Engineering and Applied Sciences

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The life expectancy of Asphalt Binder (AB) has been negatively impacted by the harsh bombardment of Ultraviolet (UV) rays. UV rays cause asphalt to oxidize faster, which results in the deterioration of asphalt's rheological characteristics that can lead to pavement distresses. This paper investigates merits of bio-char to improve asphalt aging susceptibility by blending one control binder (PG 64-22) and two bio-modified binder at concentrations of 3 and 6% individually; the specimens were then analyzed in terms of their rheological characterization before and after aging. Rolling Thin Film Oven (RTFO) method was used to age all specimens, aged and un-aged samples were then tested using a Rotational Viscometer (RV) to evaluate the changes in their rheological behavior before and after aging as a result of aforementioned modifications. This paper also looks at the chemical composition and elemental analysis of bio-char along with biochars' ability to absorb chromium. A sorption procedure was used to determine whether or not bio-char can be used to absorb chromium. The highest chromium removal occurred at a pH value of 5.5. Bio-char was used to improve dispersion and liquid retention, while enhancing oxidation resistance.

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Performance of asphalt binder blended with non-modified and polymer-modified nanoclay

Cited by 152 publications

References 22 publications

Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

The influence of nanoclay on the durability properties of asphalt mixtures for top and base layers

Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design

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