Developments of nano materials and technologies on asphalt materials – A review

High and low temperature properties of nano-particles/polymer modified asphalt

Evaluation the effect of nano-TiO2 on the rutting and fatigue behavior of asphalt mixtures

One of the main distresses of hot mix asphalt (HMA) is moisture damage. The most common method for decreasing this type of distress is using antistrip additives. In this study, the effect of nanoparticles was evaluated as an antistrip agent on the moisture damage of HMA. Two types of aggregates were evaluated in this study with different sensitivities against moisture damage (limestone and granite aggregate) and the asphalt binder with 60/70 penetration grade and nano zinc oxide (ZnO) in two different percentages by weight of the asphalt binder. The tests employed to evaluate the effects of modifying asphalt binder by nanomaterials on the moisture damage of asphalt mixture were surface free energy (SFE) and AASHTO T283. The results showed that the ratio of wet/dry values of indirect tensile strength for the mixtures containing nano ZnO for two types of aggregate were higher than the control mixtures. In addition, the results of the SFE method showed that adding nano ZnO increased the total SFE of the asphalt binder, which led to better coating of the aggregate with asphalt binder. Nano ZnO decreased the acid to base ratio of SFE of asphalt binder, while it led to improving adhesion between the asphalt binder and acidic aggregate that are prone to moisture damage.

Estimating the moisture damage of asphalt mixture modified with nano zinc oxide

Molecular dynamics study on influence of Nano-ZnO/SBS on physical properties and molecular structure of asphalt binder

Modiﬁcation of the asphalt binder is one approach taken to improve Asphalt pavement performance. Rutting is one of the most important factors that could reduce the life of asphalt pavements.Nowadays, the application of nanotechnologyto achieve materials that are more resistant is expanding in asphalt pavement thatNano-TiO2 is among the most exciting and promising classes of materials discovered recently. The purpose of this study is laboratory research on the effect of Nano-TiO2 in improving Bitumen property and rutting resistance in Asphalt pavement under dynamic loading. For this purpose, the wheel-tracking test was carried outon ordinary and Nano-TiO2 modified hot mix asphalt samples.The results illustrate that using Nano-TiO2in asphaltbinder samples cause to an improvement in ruttingdepth in comparison with theordinarymixtures.

Laboratory Study on the Effect of Nano TiO2 on Rutting Performance of Asphalt Pavements

Rutting is considered as one of the major damages in asphalt mixtures. In this study, different types of nanoparticles such as TiO2, Al2O3, Fe2O3 and ZnO in different percentages were added to the base asphalt binder in order to decrease the rutting potential of hot-mix asphalt (HMA). In the first step, asphalt binder tests for characteristics such as penetration grade, ductility, softening point and viscosity were performed on the asphalt binder modified by the nanoparticles. Then, after preparing HMA samples, the static creep test was done at two stress levels at a specific temperature. Results of this study showed that using the nanoparticles improved the behavioural properties of the asphalt binder and decreased rutting in asphalt mix samples. Furthermore, scanning electron microscope images taken from the asphalt binder samples modified by the nanoparticles demonstrated that these nanoparticles were properly distributed in the asphalt binder space and had a positive effect on the rutting performance ...

Investigating the effect of nanoparticles on the rutting behaviour of hot-mix asphalt

Surface free energy and adhesion energy evaluation of modified bitumen with recycled carbon black (micro-nano) from gases and petrochemical waste

Relationship between the surface free energy and stiffness modulus of bitumen modified with micro-nano-carbon black from end-of-life tires

Fatigue, creep and erosion are among the factors which destroy the asphalt mixture and modifying the asphalt binder via additives such as crumb rubber, sulfur, carbon, as well as natural and synthetic polymers has been done in order to improve the strength of asphalt mixture. Knowledge in the field of nanotechnology along with its capability and attractiveness for application as nanoparticles in different industries such as asphalt industry has attracted great attention in recent years. In this study, specific percentages of TiO2 nanoparticles, namely 2, 4, and 6, were added to the asphalt binder as the nanocomponent. Done physical common tests such as penetration degree, softening point, flash point and viscosity of the base asphalt binder and modified asphalt binder, the bending beam samples composed of origin asphalt sample and modified asphalt sample with 4% TiO2 nanoparticle were subjected in different micro strains to fatigue loads. Results of four point bending fatigue test showed that the addition of TiO2 nanoparticles to the asphalt binder increased the fatigue strength in the asphalt samples. Modified asphalt binder is stiffer, more viscous than original asphalt binder and due to TiO2 nanoparticles more temperature tolerance and load bearing capacity, modified Asphalt is more resistant under fatigue loads.

Rashid Tanzadeh

Papers

Laboratory Study on the Effect of Nano TiO2 on Rutting Performance of Asphalt Pavements

Investigating the effect of nanoparticles on the rutting behaviour of hot-mix asphalt

Surface free energy and adhesion energy evaluation of modified bitumen with recycled carbon black (micro-nano) from gases and petrochemical waste

Relationship between the surface free energy and stiffness modulus of bitumen modified with micro-nano-carbon black from end-of-life tires

Fatigue Evaluation of Hot Mix Asphalt (HMA) Mixtures Modified by Optimum Percent of TiO2 Nanoparticles