Design and manufacture of 3D technology for printing a three-layer spherical shell with discrete filler

Three-layer construction with a discrete filler structure, which are distinguished by high performance indicators, are investigated. An algorithm for constructing a mathematical model of this construction and the process of manufacturing a sample using 3D printing are presented. Keywords three-layer construction, spherical shell, discrete filler, 3D printing, model, sample. [email protected]

The recovery of nano-sized carbon black filler structure and its contribution to stress recovery in rubber nanocomposites

The hierarchical structural evolution of natural rubber (NR) filled with different contents of nanoscale carbon black after first loading and recovering for different times.

Gas filling in glass system

The filler structure is one of the most critical parts of the building's envelope so great emphasis should be placed on its proper design. In addition to the number of panes in the glass system, material of the spacer, the type and the concentration of the filler gas in the cavity between glasses of the insulated system as well as the size of the cavity are also important. The paper focuses on the assessment of the influence of filler gas in the glass system cavity to the energy features of the glass structure. The reason for the assessment is the key influence of the inert gas and the glass cavity dimension on the energy properties of the glass system and the fact that its gradually decreasing concentration greatly affects the properties of the glass system.

Use of a highly dispersed chalk additive for the production of concrete for transport structures

The concretes used for transport infrastructure facilities are exposed to the active impact of corrosive environment; therefore, such concretes face raised demands as for water repellency, frost resistance and corrosion resistance. These properties can be improved due to the use of additives that have a different kind of effect. This research paper gives consideration to the influence of added highly-dispersed chalk on the physical and mechanical properties of concrete, in particular, water repellency and frost resistance. Experimental data show that the doping of highly-dispersed chalk results in a reduced water repellency and an increased frost-resistance of concrete. The basic physical and mechanical properties of concretes depend on the structure with a special particle packing of the matrix in the interlayers between the structure –forming elements of each level. Assumingly, the influence of added highly-dispersedchalk on the water-repellency and frost-resistance of pavement concrete is conditioned by the optimal arrangement of chalk particles (matrix particles) in the interlayers between the cement particles and the filler (structure-forming elements).