In this paper, three kinds of carbon fiber cloth (CFRP) reinforcement schemes for aluminum alloy round tube are proposed, which are two ends reinforcement, section reinforcement and whole package reinforcement. The failure forms, load-displacement curves and stress-strain curves of aluminum alloy circular tubes reinforced by carbon fiber cloth were obtained through axial compression loading tests. The test results show that the yield strength and ultimate compressive strength of the aluminum alloy round tube strengthened by CFRP segment are superior to those of the aluminum alloy round tube strengthened by CFRP two ends and the aluminum alloy round tube strengthened by CFRP whole package. The yield strength and ultimate compressive strength of the aluminum alloy round tube strengthened by CFRP segment are increased by 17.79% and 7.76%, respectively, and the ultimate compressive strength values are increased by 2.09% and 1.93%, respectively. The ultimate displacement of the all-wrapped aluminum alloy tube is best among the three kinds of carbon fiber cloth, which is improved by 22.22% and 7.84%, respectively. Finally, by comparing the cost of aluminum alloy round pipe reinforced by CFRP segment with that of aluminum alloy round pipe reinforced by CFRP whole package, it is found that the cost of aluminum alloy round pipe reinforced by CFRP segment can be saved by 14.48%. The compression performance of aluminum alloy tube reinforced by CFRP segment is obviously improved and the cost is effectively saved.

An example of solving a thermophysical problem is the problem of metal solidification in the process of continuous casting. Depending on the temperature value, the values of thermophysical parameters of steel change significantly in this interval. There arises a difficulty in solving such a problem, which involves the need to apply a fine grid throughout the solution area.
Presented is the method of calculating the isotherm coordinates during solidification of a continuous ingot based on difference relations. The proposed approach allows to increase the step in spatial and temporal coordinate, which significantly reduces the machine time and errors arising during the calculation.

The intensively developing construction industry makes it necessary for investors to make choices related to the proper selection of materials that meet criteria and parameters imposed on them in terms of acoustic, insulation, fireproofing or durability, while at the same time meeting visual expectations and new trends in construction in the 21st century. The elements that make up a building, when combined, must form a durable, load-bearing and usable compartments in accordance with innovative standards. The market analysis for the construction sector in Poland and Europe described in the article shows that manufacturers currently offer a variety of typical and innovative building materials. In addition, the construction industry is going through construction projects that meet new trends, which require new technological solutions for the realization of the detailed design, which generates new attributes of buildings and structures.
The article discusses new solutions and standards in terms of the assumed investment budget and the adopted time frame for the execution of the assumed construction tasks. This article shows in a more detailed way the various stages of the construction of a volume building in which execution technology of the foundations, walls and ceilings have been modified. The initial design technology assumed reinforced concrete footings, masonry walls made from aerated concrete blocks and a monolithically poured ferroconcrete ceiling The task specified the optimization of time and cost variables for a better standard in the form of discussing the design of a replacement technology with foundations in the form of a reinforced slab, precast walls made of expanded clay concrete and Filigran floors. In addition to the analysis of each technology and the assumed materials, the article summarizes graphically the timeframes needed to carry out the various stages of the replacement design and a typical baseline design. In summary, the costs of realisation of the actual stages of work, taking into account market prices in Poland, where the prices of of construction materials and expert labour are changing rapidly due to the timing of the pandemic Covid19 and the war between Russia and Ukraine, which is Poland's neighbour.

The intensively developing construction industry makes it necessary for investors to make choices related to the proper selection of materials that meet criteria and parameters imposed on them in terms of acoustic, insulation, fireproofing or durability, while at the same time meeting visual expectations and new trends in construction in the 21st century. The elements that make up a building, when combined, must form a durable, load-bearing and usable compartments in accordance with innovative standards. The market analysis for the construction sector in Poland and Europe described in the article shows that manufacturers currently offer a variety of typical and innovative building materials. In addition, the construction industry is going through construction projects that meet new trends, which require new technological solutions for the realization of the detailed design, which generates new attributes of buildings and structures.
The article discusses new solutions and standards in terms of the assumed investment budget and the adopted time frame for the execution of the assumed construction tasks. This article shows in a more detailed way the various stages of the construction of a volume building in which execution technology of the foundations, walls and ceilings have been modified. The initial design technology assumed reinforced concrete footings, masonry walls made from aerated concrete blocks and a monolithically poured ferroconcrete ceiling The task specified the optimization of time and cost variables for a better standard in the form of discussing the design of a replacement technology with foundations in the form of a reinforced slab, precast walls made of expanded clay concrete and Filigran floors. In addition to the analysis of each technology and the assumed materials, the article summarizes graphically the timeframes needed to carry out the various stages of the replacement design and a typical baseline design. In summary, the costs of realisation of the actual stages of work, taking into account market prices in Poland, where the prices of of construction materials and expert labour are changing rapidly due to the timing of the pandemic Covid19 and the war between Russia and Ukraine, which is Poland's neighbour.