نتایج جستجو برای: astm d3398
تعداد نتایج: 3376 فیلتر نتایج به سال:
در ارزیابی اثرات زیست محیطی زهاب اسیدی معدن، تعیین دقیق میزان پیریت باقی مانده و کانی های هیدروکسی سولفاته حاصل از اکسایش پیریت بسیار تعیین کننده است. روش استاندارد astm-d2492 یک روش آزمایشگاهی برای تعیین دقیق این کانی ها در باطله های زغال است که با توجه به تفاوت کانی شناسی باطله های زغال و مس پورفیری، برای کاربردی شدن در باطله های مس پورفیری باید اصلاح شود. مهمترین عامل خطا در این آزمایش برای ...
Vinyl flooring manufacturers use plasticizers to decrease the viscosity and increase the pliability of vinyl. Several ignitable liquid plasticizers used in the manufacture of vinyl flooring were identified and investigated in this study. Twenty-nine collections from five major vinyl manufacturers, a total of 72 samples, were analyzed using passive headspace concentration in accordance with the ...
A dynamic light scattering (DLS) method was adopted for measuring the corrosion of iron nanoparticles. The average diameter of the nanoparticles in a sodium chloride suspension increased linearly with time as iron oxide layers formed around the nanoparticles. The nanoparticle corrosion rate determined by DLS was found to be almost identical to the value obtained by conventional immersion tests ...
One of the areas in which fire hazard assessment techniques have been applied within regulation is for transportation vehicles. In particular, commercial aviation and passenger rail have utilized fire hazard assessment as a means to achieve safety goals well before these techniques became common in buildings. This chapter will review the methods employed and the recent evolution of predictive t...
Corrosive sulfur and the effect that it has in transformer systems can be significant. The extent of the corrosion damage caused by sulfur, if left unchecked, can be so severe as to cause failure of the apparatus. The problems with corrosive sulfur have been recognized for quite some time. As early as 1948, F.M. Clark and E.L. Raab [1] issued a report on the subject for method development withi...
Abstract: Within the American Society for Testing and Materials (ASTM) a Standard Practice (Z6849Z ) is being developed to provide an objective statistical procedure for comparing air quality simulation modeling results with tracer field data. The practice is limited to steady-state local-scale transport from isolated point sources in simple terrain. Evaluation data having similar external cond...
Untuk mendukung penelitian material maju dibutuhkan sebuah mesin yang dapat melakukan pengujian keausan, salah satunya mengacu pada standar ASTM G65. Jurnal ini berisi proses pembuatan rancang bangun alat uji aus berbasis G65 dengan cakupan perancangan, pembangunan, validasi dan verifikasi.
 Validasi tahap perancangan dilakukan analisis getaran menggunakan software Ansys. Dari data diperol...
There is currently no general-purpose, open standard for storing data produced by three dimensional (3D) imaging systems, such as laser scanners. As a result, producers and consumers of such data rely on proprietary or ad-hoc formats to store and exchange data. There is a critical need in the 3D imaging industry for open standards that promote data interoperability among 3D imaging hardware and...
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