Abstract One of the major uncertainties in design molten-salt solar receivers is estimation lifetime because have to withstand high temperature, thermal stress and corrosive-media addition daily star-up shutdown. The first step estimate receiver damage therefore, monitor manage life cycle, obtain properly tube stresses under operating conditions. Whit this aim, we propose a straightforward low-...

Two kinds of layered double hydroxides (LDHs), MgAl-NO2 (N-LDH) and MgAl-CO3 (C-LDH), were incorporated to study the durability mortar concrete. The LDH contents 1%, 2%, 4% by mass concrete 0.5%, 4%, respectively. effect LDHs on sulfate resistance was studied through dry-wetting cycle test, compressive strength flexural test. In addition, effects pore structure, chloride resistance, carbonation...

Every year, the number of exploited mine workings necessary to seal mines increases in world. As a result experiments, technologies are developed that allow slurry be pumped fill free rock spaces or liquidate mass discontinuities. The preparation can divided into: subsurface and surface injection. Due pressure forces sealing move, following distinguished: gravity effectiveness work is determine...