1000 resultados para Blast effect


Relevância:

70.00% 70.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

"September 1, 1963"--Title page.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

"U.S. Atomic Energy Commission. Plowshare Program"--Cover.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

"Preliminary report"--Cover.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

"Issued: September 5, 1963"--Cover ; "February 1963"--Title page.

Relevância:

60.00% 60.00%

Publicador:

Resumo:

"U.S. Atomic Energy Commission, Plowshare Program ; Project Gnome, Carlsbad, New Mexico, December 10, 1961"--Cover.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

There are two major types of erosion testing devices that are used throughout the world for quantifying particle impact erosion against a solid surface. The first of these uses pressurised air to accelerate abrasive particles through a nozzle so that they impinge upon a target specimen. The second adopts a rotating disc to accelerate abrasive particles using the centripetal effect so that they impinge upon a series of targets arranged around the periphery of the disc. This paper reports the findings of a collaborative project that was designed to compare the performance and results obtained from a rig of each of the two types mentioned above. The sand blast type rig was provided by The Department of Powder Science Technology (POSTEC) at The Telemark Technological Research and Development Centre (TEL-TEK), Porsgrunn, Norway while the centripetal effect accelerator was provided by The Wolfson Centre for Bulk Solids Handling Technology, University of Greenwich, London, UK. The test programme included tests against a wide range of materials that are commonly used in pneumatic handling facilities. (Pneumatic handling is a means of conveying and transporting powders and granular solid materials in bulk in industrial process plant, through pipelines using a gas as the carrier medium.) Olivine sand was used as the abrasive and it was projected against the test specimens at velocities and concentrations commensurate with those seen in pneumatic conveyors. In all instances the materials used in the test programme were taken from the same batch so that scatter of experimental results due to specimen variation was minimised. The paper contains a series of recommendations for erosion testing equipment. A discussion based on the results and their applicability to the prediction of wear in pneumatic conveyors concludes the paper.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

The strength development of mortars containing ground granulated blast-furnace slag (ggbs) and portland cement was investigated. Variables were the level of ggbs in the binder, water-binder ratio and curing temperature. All mortars gain strength more rapidly at higher temperatures and have a lower calculated ultimate strength. The early age strength is much more sensitive to temperature for higher levels of ground granulated blast-furnace slag. The calculated ultimate strength is affected to a similar degree for all ggbs levels and water-binder ratios, with only the curing temperature having a significant effect. Apparent activation energies were determined according to ASTM C1074 and were found to vary approximately linearly with ggbs level from 34 kJ/mol for portland cement mortars to around 60 kJ/mol for mortars containing 70% ggbs. The water-binder ratio appears to have little or no effect oil the apparent activation energy. (c) 2005 Elsevier Ltd. All rights reserved.