Four alloys of specified composition in the Cu-Mn-Ni system were tested with respect to their casting behavior under dental laboratory conditions and their electrochemical corrosion behavior in solutions of artificial saliva at 37 C. Results of the testing indicated that it is feasible to develop non-noble metal dental casting alloys with melting points in the range of 1,000 C on the basis of the Cu-Mn-Ni system.

It is of great interest to understand the stabilization effect of steel structures by steel claddings in fire. Structural fire analysis using finite-element method, including temperature analysis and structural analysis, is important to investigate the stabilization

Material properties of steel structures are significantly reduced at high temperatures, so a fire protection has strong positive impact on the fire resistance of the structure. Fire resistance of steel elements can be increased using a layer of cement-based materials as a fire protection. Most of commonly used cement-based materials do not withstand high temperatures without noticeable reduction of mechanical properties. Hybrid cement showed some interesting properties in the way of resistance to high temperatures and adhesion to steel surfaces, thus its behavior during fire exposure should be investigated. One experimental analysis with numerical simulation is presented in this article. It examines thermal material properties of lightweight hybrid cement mortar with expanded perlite from a simple experiment with a lab gas burner.

This paper describes two different experiments on connections of trapezoidal sheets under elevated temperatures. The first experiments were tensile tests carried out on four sets of tests with screwed connections under ambient and elevated temperatures. One diameter of self-drilling screws and three different thicknesses of trapezoidal sheets were used. The applied screws were without washers, or with sealed or steel washers. The second experiment was performed in a laboratory furnace to check the catenary action of a thin-walled trapezoidal sheet. The basic theory tested in this experiment was that in the first phase of the fire the sheet behaves as a simply supported beam, while in the second phase the load bearing is transferred by a tension membrane. These experiments will be used to develop a design model of connections at high temperatures. High fire resistance of the trapezoidal sheet, dependent on suitable design of the screwed connection to the bearing structure, was confirmed. The experiment with the simple beam also confirmed catenary action.

This article briefly presents the results of measurements of the temperature field, the heat flux density field and chemical analyses of sampled smoke for the content of selected toxicants during large-scale fire test carried out with a passenger car in an open area. The measured values are compared with the values calculated from numerical modelling using the FDS computer software. The severity of the problems is documented by selected data from the statistics of fires of cars in the Czech Republic in the period of 2004-2013 and by the devastating effects of fires on their crew and its surroundings.