Nowadays, the use of reclaimed asphalt pavements (RAP) is often combined with Warm Mix Asphalt (WMA) technologies with several benefits in terms of environment, cost and mechanical performance. Concerns still exist related to in-service and aging characteristics of warm recycled mixtures since WMA technologies have been developed over the last decade and hence long term performance data are not...

Bitumen draining in stone mastic asphalt mixtures has become a potential problem. Due to the storage and laying temperatures as well difficulties providing necessary compaction, of mix cannot be lowered prevent or reduce drainage. In asphalts, generally cellulose mineral-based fibers are preferred down bitumen. Conventional commonly used increase pavement costs because they expensive. The aim t...

Plastic waste that has not been appropriately managed caused concern for various stakeholders and a negative impact on the environment. A way to minimize this issue is by promoting circular economy through recycling. Despite this, many plastic wastes cannot be economically recycled; one of them multilayer plastics due difficulty in sorting out types materials contained layers. As an alternative...

The chemical characterization of bitumen type and ageing state are fundamental in determining structural mechanical properties bitumen. This work aims to classify various types at different states identify the primary differences relevant classification. Fourier transform infrared (FTIR) spectral data eight five were analyzed using a chemometric procedure that incorporates principal component a...

This research investigates how the properties of the Nigerian crude residue can be improved on to enhance its local usage. Chemical treatment was carried out on Nigerian crude residue and its rheological properties were tested. The physiochemical propertiesspecific gravity cum viscosity measured after the treatment gave 12.44% improvement in specific gravity and 17.92 times improvement in visco...

Exposure to asphalt or bitumen fume and renal disease EDITOR,—The correspondence from Dittmer and Armitage 1 provides further support for a causal association between exposure to various hydrocarbons and the development of renal disease. Since 1912, some case reports, 2–4 case-control studies, 5 and cross sectional 6 studies together with animal experiments 7 8 have provided compelling evidence...

In this study, the recycled PET is used in bitumen modification by applying a different process order to eliminate phase separation problem. For purpose, modified bitumens are obtained adding triethanolamine (TEOA) chemical (wt. 2.5 %) and 2, 4, 6, 8, 10 pure bitumen. The properties of determined chemical, physical, rheological tests. According test results, reacts with PET, 6 % ratio critical ...

The propagation of ultrasonic guided waves in viscoelastic isotropic material has been investigated. Based on the plane theory, a numerical model of the guided waves propagating is developed in the frequency domain by employing the SFEM (spectral finite element method). To verify the proposed method, thin bitumen on the steel substrate is examined and compared with the single plate in terms of ...

The aim of this research is to evaluate the rheological properties industrial waste modified bitumen. varying proportion polypropylene ranging from 0% 20% weight bitumen at 5% interval with 60/70 penetration grade was used. asphalt binder modification prepared by using high-speed mixer temperature 150 °C 190 °C. conventional test like softening point, penetration, ductility, flash and fire poin...

Bitumen as a binder in coating and insulating materials is modified with polymers to improve its performance in service conditions. Almost all polymers are incompatible with bitumen, and at high temperatures due to relatively very low viscosity of the bitumen phase, are separated from it. These lead to a considerable limitation in the use and handling of polymer-modified bitumens. An understand...