نتایج جستجو برای: bituminous materials
تعداد نتایج: 437342 فیلتر نتایج به سال:
This paper presents an attempt to use crushed quartzite as a substitute basalt, which is since more than sixty years the most systematically used aggregate on all Senegalese territory formulate bituminous mixes for pavement. massive induced decrease of basalt reserves and it urgent find other substitution materials. article reports valorize from Bakel in region Tambacounda Senegal. The studies ...
The aim of this study was to determine the kinetic parameters of the oxy-fuel combustion of char from a Brazilian bituminous coal with a high ash content. The char, with a particle diameter of 715 μm, was prepared in a N2 atmosphere at 1173 K. The oxy-fuel combustion assays were performed using a thermobalance at different temperatures and O2/CO2 gas mixtures of different concentrations. Accord...
This study evaluates the short-term resilient behaviour of cold in-place recycled (CIR) asphalt mixtures with bitumen emulsion when they are more similar to non-cohesive granular materials than conventional hot mixtures. Gyratory compacted CIR specimens were manufactured using different proportions bituminous and water, dynamic triaxial tests conducted at curing times. The moduli obtained exper...
Polycyclic aromatic hydrocarbons (PAHs) are considered to be a group of compounds that pose potential health hazards since some PAHs are known carcinogens. During coal utilization processes, such as coal combustion and pyrolysis, PAHs released may be divided into two categories according to their formation pathways. One category is derived from complex chemical reactions and the other is from f...
The asphalt industry is constantly working to enhance the performances of materials, introducing innovative and more sustainable solutions. In this context, incorporation such as additives, polymers, used improve properties neat bitumen. This leads even complex bituminous binders, raising question, are current specifications test methods appropriate for materials? To deal with this, RILEM Techn...
The combustion of biomass and coal is the dominant source of household air pollution (HAP) in China, and contributes significantly to the total burden of disease in the Chinese population. To characterize HAP exposure related to solid fuel use and ventilation patterns, an exposure assessment study of 163 nonsmoking female heads of households enrolled from 30 villages was conducted in Xuanwei an...
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