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Wyszukujesz frazę "natural aggregate" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Revitalization possibilities of the post-mining area of natural aggregate mine in the Waryś village
Autorzy:
Kryzia, K.
Kryzia, D.
Powiązania:
https://bibliotekanauki.pl/articles/101672.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
post-mining areas
tourism space
recreation space
revitalization
mine natural aggregate
Waryś
Opis:
According to the social expectations, the natural aggregates post-mining area in Waryś should be revitalized towards the water function and serve as a recreational area. The paper identified the features which characterize the post-mining area of “Waryś” mine and its surroundings. On the basis of these features evaluation of opportunities for recreation and leisure functions was conducted. The conducted analysis indicates that although this feature seems to be attractive for many reasons, from the point of view of economic efficiency it is not justified, as the necessary revitalization works will require incurring high capital investment costs necessary for proper formation of the recreation and leisure space and its surroundings. At the same time the possible financial benefits probably will not balance the amount of costs incurred for the maintenance of the infrastructure and objects serving the recreation and leisure functions. However, the risk of failure of the revitalization may be decreased by diversifying the form of shaped space, because various revitalization modes and/or functions may efficiently coexist with each other, thereby forming a synergy effect.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 963-975
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geovisualisation as a process of creating complementary visualisations: static two-dimensional, surface three-dimensional, and interactive
Autorzy:
Horbiński, T.
Medyńska-Gulij, B.
Powiązania:
https://bibliotekanauki.pl/articles/145509.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
geovizualisation
complementary visualisations
static two-dimensional map
surface three-dimensional model
natural aggregate extraction
geowizualizacja
wizualizacja uzupełniająca
mapa interaktywna
trójwymiarowy model powierzchni
kruszywo naturalne
Opis:
In the following paper, geovisualisation will be applied to one spatial phenomenon and understood as a process of creating complementary visualisations: static two-dimensional, surface three-dimensional, and interactive. The central challenge that the researchers faced was to find a method of presenting the phenomenon in a multi-faceted way. The main objective of the four-stage study was to show the capacity of the contemporary software for presenting geographical space from various perspectives while maintaining the standards of cartographic presentation and making sure that the form remains attractive for the user. The correctness, effectiveness, and usefulness of the proposed approach was analysed on the basis of a geovisualisation of natural aggregate extraction in the Gniezno district in the years 2005–2015. For each of the three visualisations, the researchers planned a different range of information, different forms of graphic and cartographic presentation, different use and function, but as far as possible the same accessible databases and the same free technologies. On the basis of the final publication, the researchers pointed out the advantages of the proposed workflow and the correctness of the detailed flowchart.
Źródło:
Geodesy and Cartography; 2017, 66, 1; 45-58
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cost-Benefit Analysis of Using Recycled Coarse Aggregate In Plain and Fiber Reinforced Concrete
Autorzy:
Awchat, Ganesh Deoraoji
Powiązania:
https://bibliotekanauki.pl/articles/2023312.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
compressive strength
recycled aggregate concrete
natural aggregates concrete
steel fibres
state schedule of rates
Opis:
The tendency of demolition has increased to improve economic gains, functional and structural performance, and unloading expenses due to the inaccessibility of an appropriate site in a nearby area. As a result, effective utilization of construction and demolition waste materials in the form of a Recycled Coarse Aggregate of 20 mm & 10 mm is possible while conserving non-renewable natural resources. Even though recycled coarse aggregate (RCA) is a cost-effective material that provides solutions to solid waste management, it is also viewed as second-rate in terms of its basic properties compared to natural coarse aggregate (NCA). This study attempted to design two mix proportions for natural aggregate concrete (NAC) and recycled aggregate concrete (RAC). RAC supplemented with Hooked Steel Fibers at a rate of 0%, 0.25%, 0.5%, and 0.75% per cubic metre. Compressive strength considered a benefit parameter, whereas the state schedule of rates (SSR), 2020-21, was used to estimate cost. The experimental results discovered that RAC with 0.25% steel fibres(SF) per cubic metre found 7.27% less compressive strength results than NAC in Mix-1 of M25 grade, whereas it is 11.64% less compared to NAC of Mix-2 of M40 grade at 28 days, respectively. This related decrease in compressive strength compared to NAC is within the acceptable limit of Indian Standards. At the same time, cost analysis of RAC with 0.25% steel fibres per cubic metre observed 1.26% and 2.16% more than NAC of M25 & M40. It revealed that 0.25% SF per metre cube in RAC provides an economically viable solution in terms of cost and benefits compared to NAC of a similar mixture.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 233-242
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of wastewater post-treatment in filter columns with the use of mineral materials
Autorzy:
Gubernat, Sylwia
Czarnota, Joanna
Masłoń, Adam
Koszelnik, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2172364.pdf
Data publikacji:
2020
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
wastewater treatment
filtration
natural materials
lava rock
lightweight sintered aggregate
lightweight clay aggregates
oczyszczanie ścieków
filtracja
skała lawowa
lekkie kruszywo spiekane
lekkie kruszywo gliniaste
Opis:
Based on the assumptions of the circular economy model and sustainable development, we are currently looking for natural and ecological materials in terms of wastewater treatment of pollutants. This article presents the research of three mineral materials - lava rock (LR), lightweight sintered aggregate (LSA) and lightweight clay aggregates (LCA) used as filling of filtration columns for the treatment of real wastewater. The filtration process was carried out under various hydraulic loads in two columns, one of which was additionally supported by the aeration process. The post-treated sewage was characterized by the following parameters: COD (chemical oxygen demand), TOC (total organic carbon), phosphate phosphorus (P-PO4 ), total nitrogen (TN) and total phosphorus (TP). Among the hydraulic loads applied, the most optimal loads were OhI = 0.25 m3/(m2·h). Certyd turned out to be the most effective with supporting filtration with the aeration process in removing organic compounds (reduction of 65.1% COD and 38.2% TOC at OhI ). Lava rock seems to be a promising material reactive in terms of removal of biogenic compounds such as nitrogen (efficiency 23.8% at OhI ) and phosphorus (64.2% reduction of TP at OhI ) and organic compounds (21.4% reduction of TOC at OhI in conditions without aeration). LCA shows the best efficiency in sorption of phosphorus compounds (41.6% reduction of TP at OhI ) and organic compounds (21.4% TOC reduction at OhI under non-aerated conditions).
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2020, 37, 67; 47--58
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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