International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

This study presented a sustainable construction material, wood-cement briquette, for construction indust. Wood-cement briquette has significant advantages as compared to the traditional cement briquettes such as lower carbon footprint, lower cost, easy production, environmental friendliness, sustainability. Wood-cement briquettes have a good thermal insulation and sound insulation than traditional briquettes. In addition to wood, other lignocellulosic materials such as hemp and flax can be also used in the producrion. Especially, it is a better material for buildings located in earthaqure -prone areas because the relatively elastic structrure of wood makes it a good material in regions prone to seismic activity. Wood-cement briquettes are suitable material for single or dublex buildings. It is estimated that its use will considerably increase in construction industry in near future. This study, characteristics of raw materials used in wood-cement briquette, the physical and mechanical properties and potential uses of wood-cement briquettes are given in this review study.

This work develops a multicomponent system comprising unsaturated polyester resin (UPER) hydrophilizing a two-component system of sulfate-resistant cement (SC) and sulfur, diluent water and a redox system. The hydrophilized unsaturated polyester resin (HUPER) so obtained can be used as a basis for polymer-silicate composites with good strength properties, precise embossed printing on the surface of various molds, and good visual characteristics. Polymer-silicate compositions with low and high content of SC were selected, and the constant amount of SC in the two groups obtained corresponded to a gradual change in sulfur content. Time kinetic dependencies of the cross-linking process of unsaturated polyester at a given amount of redox system were monitored. Reproducibility of results for different polymer compositions was achieved thereby enabling a possibility to predict them.

This work is a continuation of the development of hydrophilized unsaturated polyester resin (HUPER). Again, the authors’ main aim is a possibility for hydrophilization of unsaturated polyester resin (UPER), but in this case the previously selected hydrophilizer cement ‘milk’ was replaced by the water glass component without disregarding the contribution of cement to the multicomponent hydrophilizing system. The special thing about this case is that there are a number of hydrophilizers, all of which individually have a hydrophilizing effect on resin, and that they are influenced by each other. This is of utmost importance not only for the hydrophilization technology but also for the research into important accompanying issues, such as kinetics, mechanical strength characteristics, spectrum and derivatographic analysis. This study only addresses some of the issues mentioned for reasons of volume of work. However, due to the possible interest they could arouse in the different fields of chemistry, in medical and technical terms, they are to be developed and resolved in the future.

This work is a continuation of the HUPER development, as in this study hydrophilization was performed by different types of cement (grey cement and medical cement). It was established that alkaline hydroxides in the cement “milk” composition traditionally perform the preselected role of a hydrophilizer. Water was used as a second dispersing component, which can not only homogenize the composition of the prepared composite material. A third component was introduced (water glass), which was studied due to its dispersing role towards the resin/cement/water system. Mechanical strength characteristics (mostly impact characteristics) characterizing the shape, dimensions and integrity of the operational product were studied based on the obtained composition in various proportions of components.