The effectiveness of natural Gilsonite on the performance properties modified bitumens was studied. Three samples having different ratios that are 6%, 8% and 10% by weight base bitumen which PG 64-16 grade were prepared. physical storage stabilities four investigated means conventional tests. short-term long-term aging processes conducted with rolling thin oven pressure vessel tests, respective...

the polymeric and non-polymeric petrochemical wastes are environmentally unfavorable materials. we have to found a way to reuse these wastes in a safe manner. in styrene-butadiene rubber (sbr) production plant two major wastes are produced one is a fine rubber powder and the other is recycled n-methyl pyrrolidone (nmp). in high-density polyethylene (hdpe) production plant also a low molecular w...

Bituminous crack sealants were analyzed by viscometry, fluorescence microscopy, infrared spectroscopy, thermogravimetry, modulated differential scanning calorimetry and low temperature tensile testing. The results indicate that sealants are blends of bitumen, oil, copolymer and filler. Upon blending, these components produce a three phase system that consists of a polymer-modified bitumen (PMB)...

The ageing of bitumen is an inevitable phenomenon which still challenging to be characterised. This paper aims at evaluating the degrees comprehensively. There were six types being aged five levels for comparing purposes and multiple rheological tests by a DSR as well chemical test SARA (saturates, aromatics, resins asphaltenes) properties carried out. critical temperatures, G-R parameter nonre...

Bitumen as a construction material is extremely widespread in hydraulic engineering and road construction. has wide variety of features useful properties, which allowed it to reach leading level among other binder building materials. The article presents the peculiarities laboratory testing bitumen. Step by step technique bitumen on ring-ball device ductilometer disclosed. importance quality co...

Bitumen, an unconventional crude oil, has received much attention with the increasing consumption and shrinking storage of conventional oils. Bitumen is highly viscous and, thus, commonly diluted for transportation purposes. Spills bitumen could occur during from reservoirs to refineries via pipeline, rail, marine vessels. Although some laboratory numerical modeling studies have been contribute...

AIMS To investigate the validity of empirical models of exposure to bitumen fume and benzo(a)pyrene, developed for a historical cohort study of asphalt paving in Western Europe. METHODS Validity was evaluated using data from the USA, Italy, and Germany not used to develop the original models. Correlation between observed and predicted exposures was examined. Bias and precision were estimated....

The roots of land plants associate with microbes, including fungal symbionts that can confer abiotic stress tolerance. Bitumen extraction following oil-sand surface mining in the Athabasca region of Alberta, Canada removes plant nutrients but leaves a petrochemical residue, making the coarse tailings (CT) hostile to both plants and microbes. We isolated an endophyte strain of the Ascomycete Tri...

In a previous paper presented at the 2008 E&E Congress, the French mirror group (BNPé/P04/GE1) of the CEN/TC336 – WG1 committee (bituminous binder) has reported the results of a round robin test on DSR complex modulus measurements involving two paving grade bitumen (10/20 and 50/70 classes) and three modified binders (plastomer, elastomer and cross-linked elastomer). This paper presents the out...