Sensitivity of shotcrete Brazilian discs coated with thin spray-on liners to environmental conditions

Shear-bond strength testing of thin spray-on liners

TSL materials for ground support were initially intended to be used as an alternative to mesh or shotcrete. The first trials on TSL technology were initiated in Canada in the late 1980s (Archibald et al., 1992). Early research led to the development of a polyurethane based product. In the 1990s, numerous advantages in terms of speed of application and minimizing transportation of materials were...

Laboratory Investigation of Support Mechanism for Thin Spray-on Liners

ABSTRACT: Rock support is the basis of any underground mine and many open cut operations. Ground support methods have evolved over the years with the current trend to use bolts, mesh and shotcrete. Thin spray-on liners may be the next step replacing mesh and shotcrete, however being a relatively new product is not well understood and no standard testing procedures exist to determine the strengt...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

p-channel thin-film transistors based on spray-coated Cu2O films

Thin Discs, Thick Discs and Transition Zones

Accretion onto a compact object must occur through a disc when the material has some initial angular momentum. Thin discs and the thicker low radiative efficiency accretion flows (LRAFs) are solutions to this problem that have been widely studied and applied. This is an introduction to these accretion flows within the context of X-ray binaries and cataclysmic variables. Accretion describes the ...