Temat: sand compaction - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of Chosen Process and Material Parameters on the Quality of Silicate Product
Autorzy:: Tarasiuk, W.
Demianiuk, L.
Powiązania:: https://bibliotekanauki.pl/articles/387166.pdf
Data publikacji:: 2012
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: zagęszczanie
jakość
compaction
lime-sand mixture
quality
Opis:: The results of experimental studies on the influence of process and material parameters on quality of a lime-sand product. The quality is determined on the basis of compressive strength in the direction of compaction of the finished product. The obtained results can be helpful in choosing granulometric composition of lime-sand mixture and determining compaction pressure for products with specific quality requirements.
Źródło:: Acta Mechanica et Automatica; 2012, 6, 1; 82-85
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Novel Approach to Quantifying the Effect of the Density of Sand Cores on Their Gas Permeability
Autorzy:: Sundaram, Dinesh
Svidró, József Tamás
Svidró, Judit
Diószegi, Attila
Powiązania:: https://bibliotekanauki.pl/articles/2105204.pdf
Data publikacji:: 2022
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: compaction
density
furan sand
gas permeability
porous media
Opis:: The density of moulding mixtures used in the foundry industry plays a significant role since it influences the strength, porosity, and permeability of moulds and cores. The latter is routinely tested in foundries using different solutions to control the properties of the moulding materials that are used to make moulds and cores. In this paper, the gas permeability of sand samples was measured using a custom-made setup to obtain the gas permeability in standard units instead of the usual permeability numbers (PN) with calibrated units. The aim of the work was to explore the effect of density variations in moulding materials on their gas permeabilities. Permeability in this work is quantified in SI units, square metres [m2]. The setup works based on Darcy’s law and the numbers obtained from the measurements can be used to deduce the gas permeability, k, of a sample. Two furan resin bonded mixtures with the same grain size distribution were hand-rammed with varying compaction forces to obtain a variation in density. Cylindrical samples (50 × 50 mm) were prepared using a silica sand aggregate sourced from a Swedish lake. The results of the measurement provided the difference in gas permeability between the samples that have varying densities. The results of permeability were then extrapolated by modifying the viscosity value of the air passed through the sample. In order to find the effect of apparent density variation on the pore characteristics of the samples, mercury intrusion porosimetry (MIP) was also performed. The results were in line with the gas permeability measurements.
Źródło:: Journal of Casting & Materials Engineering; 2022, 6, 2; 33--38
2543-9901
Pojawia się w:: Journal of Casting & Materials Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Sustainable deployment of crushed concrete aggregates strengthened with cement and sand
Autorzy:: Sharma, V.
Kumar, A.
Kaur, A.
Powiązania:: https://bibliotekanauki.pl/articles/2201120.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: sustainability
crushed concrete aggregate
cement
sand
compaction
CBR
multiple regression
zrównoważony rozwój
kruszywo betonowe
piasek
zagęszczanie
regresja wielokrotna
Opis:: Purpose: Paper assessed the feasibility of crushed concrete aggregates (CCA), a subsidiary of construction and demolition (C&D) waste, blended with cement and sand to form a composite for civil engineering field applications. Design/methodology/approach: The compaction and strength characteristics of CCA were observed by conducting Proctor compaction and California Bearing Ratio (CBR) tests. Different proportions of CCA, sand and cement were used. Moreover, the effect of curing period (0, 4, 7, 14 and 28 days) was also studied. In addition, regression analyses were performed to develop empirical expressions to predict the compaction and strength characteristics of the CCA composite. Findings: Increasing the CCA content up to 50% increases the maximum dry unit weight (MDUW) and decreases the optimum moisture content (OMC). However, on further increasing its content the MDUW decreases and OMC increases. Percent increase in the CBR value can go up to 412% if the CCA content is increased up to 50%. However, the percent reduction in CBR of about 20% can take place if 100% CCA content is used. Moreover, multiple regression shows that the experimental results are in good agreement with the predicted values. Research limitations/implications: The results obtained are purely dependent on the type of material. However, they are in favour of the used material as a probable option for road sub-base layer, and also for reducing burden on available natural resources. Therefore, it is recommended to conduct some initial tests to confirm the feasibility of the material. Practical implications: The proposed study will guide the design Engineers to choose CCA as one of the potential materials for road construction. Originality/value: It was observed that there is a need to maximize the utilization of C&D waste without making any compromise with its mechanical properties. So keeping that in view, the present study was conducted.
Źródło:: Archives of Materials Science and Engineering; 2022, 113, 1; 19--34
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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