Wyniki wyszukiwania - Biblioteka Nauki

1

Izolacje we współczesnej prefabrykacji betonowej

100%

Witkowski B. , Schabowicz K. , Moczko M.

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2021

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tom R. 26, nr 5

75--76, 78, 80

PL

Wykorzystanie elementów prefabrykowanych betonowych jest praktyką stosunkowo młodą, ale powszechnie stosowaną w budownictwie mieszkaniowym. W wyniku prowadzonych badań i wzrastającego popytu inwestorów na tego typu rozwiązania, obecnie produkowane materiały zostały przystosowane przez producentów do najnowszych wymagań i stanowią realną alternatywę dla konstrukcji monolitycznych. W artykule przeanalizowano zastosowanie współczesnych izolacji przeciwwodnych i przeciwwilgociowych w ścianach piwnic z prefabrykatów betonowych, a następnie szczegółowo opisano izolowanie termiczne z płyt PIR ścian zespolonych wraz z przedstawieniem otrzymanych wyników w zakresie parametrów cieplnych przegrody.

EN

The use of precast concrete elements is a relatively recent practice, but it is commonly used in housing construction. As a result of the conducted research and the growing demand for this type of solutions among the investors, the materials currently produced have been adapted by the manufacturers to the latest requirements and may be a real alternative to monolithic structures. The article analyses the use of modern waterproofing and anti-damp insulation in cellar walls made of precast concrete elements. Then the author described in detail the thermal insulation of composite walls made of PIR panels, along with the presentation of the obtained results in the field of thermal parameters of the partition.

2

Headed fastenings acting in cooperation with supplementary steel reinforcement

84%

Bujnak J. , Farbak M.

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tom z. 14

95--103

3

Analysis of fees for connecting the infrastructure of generally accessible charging stations to networks with rated voltage not higher than 1 kV

84%

Ślęzak A.

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tom Vol. 14, no. 1

107--114

EN

On 22 February 2018, the Act on electromobility and alternative fuels came into force (Journal of Laws of 2018, item 317). This legal Act sets out the rules for the development and operation of infrastructure for the use of alternative fuels, which is closely related to the development of electromobility. The Act (2011/C81E/17) regulates and defines, among others obligations in the scope of technical requirements for the construction of a charging station and their minimum number in municipalities. This Act was introduced in order to develop electromobility, which in turn is to contribute to the reduction of CO2 emissions [1]. The aim of the paper is to show the relationship between the geographical location of the connection of road charging infrastructure in our country, and the costs of its connection to the low voltage network, understood as the costs of the connection fee, which are paid to the Distribution System Operators. The costs of the connection fee in the case of power supply from low voltage lines cover the actual connection costs of generally available charging stations, i.e. the connection costs, i.e. the network section used to connect the devices or installations or the network of the entity with the connection capacity required by it, with the remaining part of the Distribution System Operators network. The Distribution System Operator also covers the costs of the measurement and settlement system. In addition, the paper indicates the preferential treatment of connecting charging stations, which are defined as reduced costs of connecting them in relation to other objects.

4

Effect of curing regimes on the mechanical and fresh properties of steel fiber-reinforced concrete

84%

Öztürk O. , Yenidünya E. , Keskin Ü. S.

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tom Vol. 14, no. 1

69--82

EN

Properties of concrete are affected by its fabrication process such as preparation, mixing, placing, finishing and curing. Since curing process is the ultimate stage of the fresh state of concrete before it is put into service, it is of great significance that is needed to be strictly handled. In the present study, steel fiber reinforced concrete was investigated in terms of different curing regimes including precast technology and comparative analysis was performed. To this end, beams and cubes specimens were fabricated and cured under steam process to represent the applications of precast concrete industry. Findings were compared with the other types of curing regimes. Mechanical behaviors of specimens were evaluated along with their strength development and workability in the presence of steel fiber. Results indicated that adequate workability and mechanical properties were obtained for steam-cured specimens compared to other specimens produced with different curing regimes. However, production parameters such as mixture proportion and fiber dosage were more pronounced for low-strength concrete specimens compared to high strength steam cured concrete specimens.

5

Proposal for Modernisation of Large Block System Buildings (Lbs) - Facades – Lublin University of Technology

67%

Miedviedieva Wright A. , Ostańska A.

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tom Vol. 31, no. 3

235--250

EN

The over 40-years-old housing stock from the industrialized mass housing era is today functionally deficient and does not meet the current needs of residents. In particular, there are numerous architectural barriers, the systems are worn and obsolete, and the number of housing types is very limited. Examples of the modernization of multi-story residential buildings (the article presents those from Russia and Ukraine) confirm that this problem is universal, and a significant improvement of the building’s. Utility value can be achieved through a relatively small modification of the building fabric: precast concrete structures of the buildings prove to be flexible enough to accommodate deep changes. The authors present a concept of modernization of a building erected in a “large block” system, typical for the Polish housing of the 1970s in many cities. The case study concerns a particular building located in Lublin in one of the large housing estates – the concept of its modernization is compatible with the local spatial development plan, the proposed solutions are architecturally coherent and technically feasible.