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Analiza możliwości termomodernizacji schroniska górskiego z początku XX wieku na przykładzie Domu Śląskiego w Karkonoszach

Kropidłowska Oliwia, Nowak Łukasz

Przegląd Budowlany

2023

R. 94, nr 11-12

163--167

Jednym z kluczowych obszarów działań mających spowolnić zmiany klimatyczne, a następnie je zatrzymać, są działania modernizacyjne w sektorze budynków istniejących o bardzo niskiej efektywności energetycznej. Do tej grupy zaliczają się budynki o ponad 100-letniej historii, czasami pełniące funkcje reprezentacyjne, hotelowo-konferencyjne, wypoczynkowe czy, jak w tym przypadku, schroniska górskiego. W artykule poruszono tematykę modernizacji starego schroniska górskiego na podstawie Domu Śląskiego w Karkonoszach, w której przedstawiono efektywność energetyczną w stanie istniejącym i możliwości jej poprawy wskutek szeregu działań termomodernizacyjnych.

One of the key areas of action to slow down and then stop climate change is thermal modernization of existing buildings with very low energy efficiency. This group includes buildings with over 100 years of history, sometimes serving representative, hotel and conference functions, leisure facilities or, in this case, a mountain hostel. The article deals with the subject of thermal modernization of an old mountain shelter on the basis of Dom Śląski in the Karkonosze Mountains, in which energy efficiency of the existing state and the possibilities of its improvement as a result of a series of thermal modernization activities are presented.

Application of sawdust concrete in construction

Kropidłowska Oliwia

Budownictwo i Architektura

2022

Vol. 21, no 3

5--18

Sawdust concrete is a type of lightweight concrete in which some of the mineral aggregate is replaced by sawdust - a by-product of wood processing. It is not a new material, but its potential is not utilised to its full degree. Taking into account the most important advantages of sawdust concrete - lower density and greater thermal and acoustic insulation than ordinary concrete - it is worth to consider the possibilities of its usage in construction wider than currently . In order to present the properties of sawdust concrete, the review of contemporary technical literature has been performed. For the production of sawdust concretes mineralized sawdust from various types of trees, ordinary cements, mineral aggregates and water, are used. The usage of additives and admixtures is also allowed. The properties of the finished sawdust concrete are mainly influenced by the proportion of its components, especially the amount of fine aggregates replaced by sawdust. The construction products made of sawdust concrete are characterized by a low coefficient of thermal conductivity λ and soundproofing properties. In bending tests, a simply supported sawdust concrete beam behaves similar to a regular concrete beam, cracks first appear in the tension zone. Tensile strength, compressive strength and Young's modulus of sawdust concrete products depend on the proportion of components and the method of sawdust preparation before applying in the sawdust concrete-mix. Compared to ordinary concrete, the obtained values for sawdust concrete are lower, but partially fall within the ranges for the lower classes of ordinary concrete. There are several possible applications of sawdust concrete in construction. One of the perspectives is to use it to build walls in buildings that require soundproofing between rooms, or to replace wood with it when renovating old buildings. However, further tests of sawdust concrete are needed in terms of the most favourable composition for its mechanical properties, and to define the standards according to which sawdust concrete elements should be produced.