In alpine regions, the durability of asphalt pavement is worse due to harsh climate. However, crumb rubber modified has potential improve pavement. Based on matrix asphalt, rubber, Trans-Polyoctenamer Rubber Reactive Modifier (TOR), and an orthogonal test, preparation scheme suitable for regions was obtained. The selected 30 mesh, content 24% quality asphalt. Shearing time 60 min, temperature 2...

In the pursuit of a sustainable environment, and facing threat continuous growth solid waste in Iraq, this study investigated impact using blowdown, carbon-sulfur byproduct material sulfur purification, as mineral filler on durability rutting resistance dense-graded asphalt mixtures Styrene-Butadiene-Styrene (SBS)-modified asphalt. Three different blowdown rates (4%, 5%, 6% by weight aggregate)...

Rutting is one of the major distresses in the flexible pavements, which is heavily influenced by the asphalt mixtures properties at high temperatures. There are several methods for the characterization of the rutting resistance of asphalt mixtures. Flow number is one of the most important parameters that can be used for the evaluation of rutting. The flow number is measured by the dynamic creep...

Permanent deformation (rutting) is one of the typical failure modes asphalt pavement with a semirigid base in high-temperature areas. To address issues structure and remaining life prediction, method combining accelerated testing finite element (FE) simulation was proposed. A modified Burgers model considering creep parameter damage obtained using strain monitoring data laboratory test values, ...

Document summarizes a procedure to establish pay factors for asphalt concrete pavement construction using performance models for fatigue and rutting based on the analysis of accelerated pavement tests from the Caltrans Heavy Vehicle Simulator (HVS) and the WesTrack accelerated pavement performance test program. Results of the performance-based approach are compared with pay factors determined b...

Bouts of vocalizations given by seven red deer stags were recorded over the rutting period, and homomorphic analysis and hidden Markov models (two techniques typically used for the automatic recognition of human speech utterances) were used to investigate whether the spectral envelope of the calls was individually distinctive. Bouts of common roars (the most common call type) were highly indivi...

The increase use of crumb rubber in flexible pavements requires the better understanding of its effect on physical and rheological properties of rubberised bitumen binders. The performance properties of rubberised bitumen binder are influenced by the blending conditions and crumb rubber content. The main objective of this research is to investigate the effect of various crumb rubber content on ...

In ungulates, males and females have contrasting life histories, as usually only the females raise the young. How reproductive effort in males varies with individual level and population level characteristics has received little attention in the literature. Using published information on direct (weight loss during the rut) and indirect (rutrelated changes in activity budgets, fighting frequency...

This work aims to improve the rutting and fatigue cracking resistance of asphalt binders using selected nanoor micro-sized materials and to shed light on the microstructure changes induced by such modification to asphalt binders. The four modifiers (Nanomer I.44P, carbon microfiber, non-modified nanoclay and polymer modified nanoclay) were added into the control asphalt binder (PG 58-34). The S...

In order to study the mechanical properties and effect of a regenerant on cold recycled mixture with asphalt emulsions (CRMEs), moisture susceptibility, high-temperature performance, low-temperature dynamic durability CRMEs were analyzed evaluated by immersion splitting strength tests, freeze-thaw rutting semi-circle bending uniaxial compression modulus tests indirect tensile tests. Scanning el...