نتایج جستجو برای: bituminous materials
تعداد نتایج: 437342 فیلتر نتایج به سال:
Brown carbon (BrC) draws increasing attention due to its effects on climate and other environmental factors. In China, household coal burned for heating and cooking purposes releases huge amounts of carbonaceous particles every year; however, BrC emissions have rarely been estimated in a persuasive manner due to the unavailable emission characteristics. Here, seven coals jointly covering geolog...
below the surface through scarifier teeth. Emulsions and medium-curing and slow-curing asphalts were used. The travelling plant-mix was not entirely satisfactory because of conditions existing on this project. It is necessary to have the windrow of material quite wet in order to get it through the travelling pug-mill mixer. The project was built late in the fall, and the water did not evaporate...
The mining industry manages large volumes of tailings, sludge, and residues that represent a huge environmental issue. This fact has prompted research into valorization these wastes as alternative aggregates for concrete production, embankments, pavement material, etc. use resource construction presents two benefits: conserving natural resources reducing the impacts mining. In case road constru...
The performance and lifetime of the flexible asphalt pavement are mainly dependent on interfacial bond strength between layer courses. To enhance layers, adhesive materials, such as tack coats, used. coat itself is a bituminous material, which applied an existing relatively non-absorbent surface to ensure strong old newly paved layer. primary objective this study was evaluate effects various ty...
The road construction sector is one of the most raw material-intensive sectors in existence. As a result, it has significant impact on environment. For this reason, there are several research projects which industrial by-products used as materials. In turn, energy production from biomass combustion considered to be promising sources. However, type produces number wastes that need treated, such ...
Coal is a porous medium with complex pore structures. The characteristics of the pore structure play an important role in various aspects of coal use, including extraction of methane from coal seams, CO2 sequestration in coal, and water purification by activated carbon. To describe comprehensively the pore structure of coal, we apply transmission electron microscopy (TEM) and synchrotron small-...
Mining and logging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 854 876 881 882 883 890 7 Logging.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1133 49.9 52.9 53.2 55.2 54.4 54.1 -0.3 Mining. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 803.7 ...
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