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Tytuł:
Experimental study on the dynamic tensile mechanical properties of marble under water and oil conditions
Autorzy:
Li, Chaoxin
Liu, Dongyan
Zhu, Yunhui
Powiązania:
https://bibliotekanauki.pl/articles/27312136.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
rozciąganie dynamiczne
pręt Hopkinsona
rozpraszanie energii
symulacja numeryczna
marmur
woda
olej
dynamic tensile
Hopkinson bar
energy dissipation
numerical simulation
marble
water
oil
Opis:
To investigate the dynamic tensile properties and energy dissipation characteristics of marble in three different conditions: dry, water-saturated, and oil-saturated, a Brazilian disk splitting test was conducted using a 50 mm diameter Hopkinson pressure bar (SHPB) device. The findings indicate that the peak strain and dynamic tensile strength of the three conditions increase with strain rate, exhibiting a clear strain rate effect. Additionally, lubricating effects of water and oil weaken internal shear sliding friction, thus promoting crack expansion. Furthermore, immersion of fluid in marble weakens the cementation of internal mineral particles, leading to lower tensile strength of marble saturated with water and oil compared to dry marble under dynamic impact. When analyzing the energy dissipation of marble, both the absorption energy and dissipation energy density increase with oil strain rate, indicating a positive correlation. Moreover, numerical results obtained from ANSYS/LS-DYNA correspond well with experimental data, thus verifying and interpreting the experimental outcomes.
Źródło:
Archives of Civil Engineering; 2023, 69, 3; 317--330
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of physical and mechanical properties of limestones used as marble in Tut-Adiyaman Region in Turkey
Autorzy:
Rizaoğlu, Tamer
Çoşkun, Canberk
Camuzcuoğlu, Murat
Powiązania:
https://bibliotekanauki.pl/articles/27324327.pdf
Data publikacji:
2022
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
natural stone
marble
limestone
physico-mechanical tests
Opis:
This study aimed to reveal the petrography and physical-mechanical properties of limestones, which have an important reserve and are used as marble, in Tut district of Adıyaman province, which is one of the important cities of southeast Anatolia. As a result of petrographic analysis of the rock known commercially as Emprador, it was determined that it is bioclastic limestone with abundant nummulite fossils. Density, dry and saturated unit weight, water absorption, surface roughness, abrasion resistance and uniaxial compressive strength tests were applied to determine the physical and mechanical properties of the limestones. According to the test results obtained, the density of the limestones, dry unit weight, saturated unit weight, water absorption by weight, water absorption by volume, average surface roughness, ten points roughness average, maximum roughness value, Bohme abrasion resistance and uniaxial compressive strength values were determined as 2.486 gr/cm3, 2.478 gr/cm3, 2.52 gr/cm3, 1.482%, 3.644%, 3.31 μm, 16.24 μm, 20.03 μm, 8.958 cm3/50cm2 and 1004.03 kgf/cm2 respectively. The results show that the limestones in and around Tut (Adıyaman) county can be used in large areas for decorative purposes, with their physical and mechanical properties, as well as their colour tone and the texture formed as a result of the calcite veins being shaped like a natural pattern.
Źródło:
Mining Machines; 2022, 40, 3; 141--148
2719-3306
Pojawia się w:
Mining Machines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Recycled Tire Rubber and Marble Waste on Fresh and Hardened Properties of Concrete
Autorzy:
Djebien, Rachid
Bouabaz, Amel
Abbas, Yassine
Powiązania:
https://bibliotekanauki.pl/articles/27314703.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
recycling tire rubber
marble waste
green concrete
properties
odpady gumowe
odpady marmurowe
recykling
beton
Opis:
This paper investigates the effect of simultaneous adding of recycled tire rubber (RTR) and marble waste (MW) as fine aggregates on the properties of concrete. To achieve this objective, the particles size distribution of crushed sand (CS) was corrected by the use of marble waste sand (MWS), and RTR was used by volumetric substitution (1%, 2%, 3% and 4%) of aggregates in concrete. The fresh properties were investigated using the slump, density and air content tests. Hardened properties were investigated through the compressive strength, flexural strengths, pulse velocity, elastic modulus and water absorption. The obtained results showed that the increase in the substitution rate of RTR reduced the fresh and hardened properties of concrete containing marble waste sand. However, with low substitution rates the properties of concrete remain satisfactory and the utilization of RTR and MWS leads to making a green concrete while protecting the environment.
Źródło:
Civil and Environmental Engineering Reports; 2022, 32, 1; 218--239
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From waste to treat waste : exploitation of marble dust as a harmful pollutant to a green adsorbent for dyes and heavy metals from industrial wastewater
Autorzy:
Attia, H.A.
Farghaly, Mohamed G.
Saleh, A.M.
Abdel Khalek, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/2175448.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
marble dust
pollutant
adsorbent
dye
heavy metals
textile wastewater
Opis:
The marble dust as a harmful industrial waste of marble fabrication was evaluated as aneconomical and efficient green adsorbent for Acid Red-1 dye and lead ions. The XRD, XRF, particle size, surface area and zeta-potential measurements were used to characterize the marble dust. The removal efficiency was optimized by studying several parameters such as pH, temperature, contact time, adsorbent dose and initial concentration. The optimum removal was achieved at pH 6, 20°C after 60 min in the presence of 2.5g/L marble dust. The rates of adsorption were found to follow the pseudo-second-order model. The results showed better fitting to Freundlich isotherm. The thermodynamic studies revealed that the adsorption process is spontaneous, exothermic and favorable at low temperature. The free energy (∆G°), enthalpy (∆H°), and entropy (∆S°) changes were calculated to predict the nature of adsorption.The removal efficiency was improved by calcination of the marble at 700°C. Application for textilewastewater showed high removal efficiency up to 99.9%of inorganic and organic pollutants. The product of treatment was used in the concrete and bricks manufactured, so there is nogeneration of second-order pollutants.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 154007
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inwentarz marmurów z krakowskiego warsztatu Sebastiana Sali z 1653 r. Kilka uwag na temat biografii rzeźbiarza i jego ostatnich zamówień
Marble Inventory of Sebastian Sala’s Cracow Workshop from 1653. Remarks on the Sculptor’s Biography and His Last Commissions
Autorzy:
Janowski, Piotr Józef
Powiązania:
https://bibliotekanauki.pl/articles/15582264.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Sztuki PAN
Tematy:
Inwentarz
czarne „marmury”
warsztat rzeźbiarski
Sebastian Sala
Maciej Łubieński
Stefan Koryciński
Kraków
Gniezno
Klimontów
Sandomierz
Inventory
black ‘marble’
sculpture’s workshop
Cracow
Opis:
Na podstawie nieznanego dotąd inwentarza marmurów znajdujących się w warsztacie rzeźbiarskim Sebastiana Sali oraz dodatkowych źródeł uzupełniono wiedzę na temat jego biografii i działalności artystycznej. Wskazano lokalizację mieszczącej się w północno-zachodnim międzymurzu przy bramie Sławkowskiej w Krakowie pracowni mistrza oraz omówiono profil jej działalności. Artyście przypisano zespół czarno-marmurowych portali z kościoła kolegiackiego pw. św. Józefa w Klimontowie oraz wczesnobarokowy portal z kościoła katedralnego pw. Narodzenia Najświętszej Marii Panny w Sandomierzu. Ponadto wskazano, że niedługo przed śmiercią Sebastiana Sala realizował zamówienie dla prymasa Marcina Łubieńskiego, najprawdopodobniej na wykonanie jego nagrobka do katedry w Gnieźnie. Potwierdzono także przyjęcie przez artystę zlecenia od marszałka koronnego Stefana Korycińskiego, które można wiązać z ostatecznie niezrealizowanym projektem dekoracji rzeźbiarskiej kaplicy przy kościele pw. św. Szczepana w Krakowie.
Based on the previously unknown inventory of marbles found in the sculpture workshop of Sebastian Sala and additional sources the knowledge of his biography and artistic activity has been complemented. The location of Sala’s workshop in the north-western Zwinger by Cracow’s Sławkowska Gate has been ascertained, and the profile of his output has been discussed. The artist has been attributed a pair of black-marble portals from the Collegiate Church of St Joseph in Klimontów and the early-Baroque portal from the Cathedral Church of the Nativity of the Blessed Virgin Mary in Sandomierz. Furthermore, it has been demonstrated that not long before his death Sebastian Sala was executing a commission for Primate Marcin Łubieński, most likely working on his tomb for the Gniezno Cathedral. Also, it has been confirmed that the artist received a commission from Crown Marshal Stefan Koryciński, which can be associated with Koryciński’s plan, finally unaccomplished, to provide sculptural décor to the chapel by the Church of St Stephen in Cracow.
Źródło:
Biuletyn Historii Sztuki; 2022, 84, 2; 311-337
0006-3967
2719-4612
Pojawia się w:
Biuletyn Historii Sztuki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Petrograficzne uwarunkowania zmienności mechanicznych właściwości niejednorodnego strukturalnie marmuru kalcytowego
Petrographic constraints on the mechanical properties of a structurally heterogenous calcite marble
Autorzy:
Rembiś, Marek
Kośla, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2074301.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
marmur Fior di Pesco Carnico
analiza petrograficzna AGA
Adjacent Grain Analysis
ugięcie
marble Fior di Pesco Carnico
bowing
Opis:
Due to its exceptional ornamental properties, the marble Fior di Pesco Carnico (FDP marble) is a common decorative stone applied to external and internal building elevations. The rock is characterized by a considerable structural and textural variability; however, this feature pertains only to a minor degree to its directional arrangement of anisotropy planes (i.e. lamination) being usually dependent on the non-uniform, spatial distribution of rock mineral components or some textural elements, mainly veins. As a result, the utilitarian properties of the FDP marble varies dependingon therockzone. Petrographic AGA(Adjacent Grain Analysis) investigations were carried out on samples representing various fragments of a marble slab and essential mechanical parameters of the rock were determined. It has been established thatthe FDP marble is deformable asaresultof temperature changes (bowing) and that this feature can be explained to asignificant degree by the type ofcontacts between calcite blasts (AGA = 6). Other highly variable marble properties include the flexural strength under the concentrated load and the breaking load at dowel hole in different places of a marble plate. It has also been shown that applying to computational project works lower values of the expected mechanical rock parameters instead of their mean values has a ensible justification, as to a large extent it secures a higher exploitation safety of the marble to be used within a building object.
Źródło:
Przegląd Geologiczny; 2022, 70, 2; 116--125
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shrinkage and Absorption of Sand Concrete Containing Marble Waste Powder
Autorzy:
Djebien, Rachid
Abbas, Yassine
Bouabaz, Amel
Ziada, Yasser Nacereddine
Powiązania:
https://bibliotekanauki.pl/articles/27314704.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sand concrete
marble powder
waste
shrinkage
absorption
kruszywo betonowe
proszek marmurowy
odpady
wchłanianie
Opis:
In the context of growing scarcity of natural resources, the high demand of aggregates and the difficulties to open new quarries, several studies were carried out to study the possibility of reuse of waste and industrial by-products to replace traditional materials which would run out, replace materials when transport distances increase to reduce construction costs and protect the environment. This experimental study aims to investigate the effect of marble waste used as powder on the shrinkage and absorption of sand concrete in order to reuse it in the production of sand concrete. To achieve this goal, several sand concrete mixtures containing different substitutions rates of marble powder (4, 8 and 12%), and different Water / Cement ratio (0.71, 0.74, 0.77) were produced. Then, the evolution of the shrinkage and absorption values of sand concrete mixtures was studied. The obtained results showed that marble waste powder plays a positive role in reducing of shrinkage and absorption values of sand concrete and lead to the production of eco-friendly sand concrete.
Źródło:
Civil and Environmental Engineering Reports; 2022, 32, 1; 240--254
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the shear creep characteristics of anchored jointed rock masses under creep fatigue loading
Autorzy:
Song, Yang
Li, Yong-Qi
Powiązania:
https://bibliotekanauki.pl/articles/2200837.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
disturbed load
sandstone
marble
creep body
rheological model
Opis:
To study creep characteristics of deep rock masses under low-frequency earthquakes and other loads, sandstone and marble samples were used to characterize soft rock and hard rock, respectively. Shear creep tests of anchored rock masses under fatigue loading were carried out by using the graded loading method. A new nonlinear rheological model was constructed to characterize mechanical properties of anchored rock masses under fatigue loading. Creep fatigue curves of soft rock and hard rock have clear creep characteristics including instantaneous, attenuation, steady-state and accelerated creep stages. This work provides new insights into the stability of rock masses.
Źródło:
Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 625--635
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Inscription of Tiberius Claudius Claudianus Hetereianus Engraved on a Marble Column Found in the ‘Saranda Kolones’ Castle at Nea Paphos, Cyprus
Autorzy:
Kordas, Anna Urszula
Powiązania:
https://bibliotekanauki.pl/articles/2180005.pdf
Data publikacji:
2022-12-31
Wydawca:
Polska Akademia Nauk. Instytut Kultur Śródziemnomorskich i Orientalnych PAN
Tematy:
Cyprus
Nea Paphos
Greek inscription
marble column
Roman citizens in Cyprus
equites
ordo equester
Opis:
This paper offers the editio princeps of a Greek inscription engraved on a marble column discovered in the ‘Saranda Kolones’ Castle at Nea Paphos in Cyprus. The inscription, dated to the second or early third century AD, contains the names of the otherwise unknown Tiberius Claudius Claudianus Hetereianus, a member of the ordo equester, a founder of the column. This is the only known inscription mentioning the name Hetereianus. It remains an open question as to whether the man mentioned by the inscription was a Cypriot by birth or came to Cyprus, as well as whether he was the founder of this column only or a whole colonnade.
Źródło:
Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences); 2022, 35; 59-74
2084-6762
2449-9579
Pojawia się w:
Études et Travaux (Institut des Cultures Méditerranéennes et Orientales de l’Académie Polonaise des Sciences)
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A combined hydrocyclone - electrocoagulation treatment for different types of industrial wastewater
Autorzy:
Farghaly, Mohamed G.
Attia, H.
Saleh, H. A.
Ramadan, A. M.
Abdel Khalek, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/1448028.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hydrocyclone
electrocoagulation
paper industry
iron industry
marble industry
granite industry
Opis:
Every year, a large amount of mineral processing wastewater is discharged from various industries into the environment which is considered a challenging task not only because of its large volume, but more importantly, its hazardous components, while its reuse as feedwater without proper treatments causes great harm to the final product of these industries. Cost-effective methods are required to treat a wide range of industrial wastewater in a diverse range of conditions. In this study, a combined hydrocyclone-electrocoagulation system is tried to treat the wastewater for industries with high water consumption and high pollutants such as paper industry, iron and metal forming industry, and marble industry. The effects of the hydrocyclone operational parameters, such as feed inlet pressure and diameter, vortex finder diameter, apex diameter, and feed solids content, were investigated. In the case, wastewater of paper industry, the following optimum conditions $(P = 4.5$ bar, $D_o = 15.8 mm, D_u = 6 mm, D_i = 4 mm and c_s = 2.3%)$ were achieved. An overflow of about 90.58% water recovery and 21.45% solid at 75.92% separation efficiency was obtained. The results showed that the hydrocycloneelectrocoagulation treatment has efficiently treated the three different types of industrial wastewater. The chemical oxygen demand (COD), biochemical oxygen demand (BOD), total solid (TS), total suspended solids (TSS), colour and turbidity, were reduced sharply and met the effluent discharge or reuse standards. Also, compared with the hydrocyclone-treated wastewater, the hydrocyloneelectrocoagulation-treated wastewater was found to be more enhanced.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 2; 143-155
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orszak Dionizosa: Waza Townleya i jej poznańskie kopie
Autorzy:
Rosół, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/2028238.pdf
Data publikacji:
2021-12-28
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
sztuka starożytna
starożytne wazy marmurowe
mitologia grecka
religia grecka
recepcja tradycji starożytnej
Ancient art
Ancient marble vases
Greek mythology
Greek religion
Reception of the Ancient tradition
Opis:
At the main entrance to the Adam Mickiewicz Park in Poznań, there are two identical stone vases with ancient motives. The author indicates that they are not merely neoclassical works from the beginning of the 20th century, but copies of the famous Townley Vase dating back to the Roman times. Then, he focuses on the retinue of Dionysus on the main frieze of the vase and discusses all ten figures occurring in it.
Źródło:
Collectanea Philologica; 2021, 24; 173-183
1733-0319
2353-0901
Pojawia się w:
Collectanea Philologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review: sustainable compressive strength properties of concrete mix with replacement by marble powder
Autorzy:
Sharma, N.
Singh Thakur, M.
Goel, P. L.
Sihag, P.
Powiązania:
https://bibliotekanauki.pl/articles/367956.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
marble powder
strength properties
cement
aggregates
proszek marmurowy
właściwości wytrzymałościowe
kruszywa
Opis:
Purpose: Over the years, various experiments have been performed to investigate the impact of marble powder within the concrete mixture. In the present study, a review has been done to check the persistence of marble dirt as the substitute for concrete constituents. Design/methodology/approach: Furthermore, the impact of marble powder as a replacement of cement and aggregates were reviewed. By reviewing previous studies, the result indicates that the use of waste marble powder in cement and aggregate was adequate to a certain range. Findings: By replacing cement with marble powder in a range between 5% to 10% by weight, it increases the compressive strength of concrete mix by 11.30% to 24.56%, compared to the nominal mix. According to the study, any further increase in the amount of marble powder in place of cement i.e, 12.5% to 20% replacement by weight, results in the reduction of compressive strength of concrete mix by 7.5% to 26.01%. Replacement of aggregates from 5% to 75% with marble powder increases the compressive strength of about 3.22% to 23.91% as compared to the nominal mix. Research limitations/implications: It was also concluded from the current study that, to obtain higher compressive strength, it is advantageous to replace fine aggregates with marble powder than the replacement of cement with the marble powder.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 98, 1; 11-23
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alexandria, Kom el-Dikka. Fieldwork in the 2019 season
Autorzy:
Majcherek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1634063.pdf
Data publikacji:
2020-12-19
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Alexandria
lime kilns
Roman mosaic
ceramics
decorative marble
conservation
Opis:
The report offers an account of archaeological and conservation work carried out at the site. Excavations in the central part of the site (Sector F) were continued for the fourth season in a row. Exploration of remains of early Roman houses led to the discovery of a well preserved multicolored triclinium mosaic floor with a floral and geometric design. A large assemblage of fragments of polychrome marble floor tiles, recorded in the house collapse, showed the scale of importation of decorative stone material from various regions of the Mediterranean. Overlying the early Roman strata was direct evidence of intensive construction work carried out in the vicinity in the form of large-scale kilnworks, supplying lime most probably for the building of the late Roman bath and cistern. Included in the presentation is a brief review of the limited conservation work that was conducted in the complex of late antique auditoria.
Źródło:
Polish Archaeology in the Mediterranean; 2020, 29(2); 469-496
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of marble dust and glass fiber on expansive soil
Wpływ pyłu marmurowego i włókna szklanego na ekspansywną glebę
Autorzy:
Shukla, Rajesh P.
Algotari, Divyanshu
Rathod, Mahendrasinh
Powiązania:
https://bibliotekanauki.pl/articles/1841469.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
compressive strength
reinforcement
fibers
marble dust
stabilization
depozycja na czynniki atmosferyczne
huta miedzi
emisje
metale
Opis:
India shares a significant production of glass fiber and marble wastes in the world, which poses a big disposal problem. This study assesses the suitability of glass fiber and marble dust to enhance the behaviour of expansive soil. The Atterberg’s limits and plasticity index improves by mixing marble dust into the soil. Whereas, the effect of glass fiber on the Atterberg’s limit is not very encouraging. The shear strength increases with the addition of marble dust as well as glass fibers. The effect of glass fiber on strains corresponding to peak stress is significantly higher than the marble dust. The strength of fiber-reinforced soil initially increases with the addition of marble dust, to a certain extent, beyond which it decreases. The effect of marble dust on variation in peak stress and corresponding strains is that fiber-reinforced soil is almost the opposite. The optimum quantity of marble dust and glass fiber is found to be 10%-15% and 3%, respectively.
Gleby ekspansywne to gleby, które mają zdolność kurczenia się i / lub pęcznienia, a tym samym zmiany objętości, w zależności od zmian wilgotności. Utylizacja odpadów przemysłowych to duży problem w Indiach. Obecnie wiele produktów odpadowych stało się popularnymi materiałami konstrukcyjnymi. W niniejszej pracy oceniano przydatność zbrojenia włóknem szklanym do poprawy wytrzymałości gruntu ekspansywnego. Ponadto określa się również wpływ pyłu marmurowego na grunt wzmocniony włóknami. Limity Atterberga i wskaźnik plastyczności poprawiają się poprzez mieszanie pyłu marmurowego z glebą. Natomiast wpływ włókna szklanego na granicę Atterberga nie jest zachęcający. Wytrzymałość na ścinanie wzrasta wraz z dodatkiem pyłu marmurowego oraz włókien szklanych. Jednak wpływ włókna szklanego jest relatywnie bardziej zauważalny w porównaniu z pyłem marmurowym. Stwierdzono, że optymalna ilość pyłu marmurowego i włókna szklanego wynosi odpowiednio 15% i 3%. W przypadku włókna szklanego wytrzymałość na ściskanie i odpowiednie odkształcenie wzrastają odpowiednio o 55–58% i 700%. W gruncie zbrojonym włóknem wytrzymałość początkowo wzrasta wraz z dodatkiem pyłu marmurowego, do pewnego stopnia, po przekroczeniu której maleje. Stwierdzono, że wpływ pyłu marmurowego na zmienność szczytowych naprężeń i odpowiadających im odkształceń gleby wzmocnionej włóknami jest prawie przeciwny.
Źródło:
Inżynieria Mineralna; 2020, 2, 2; 111-118
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Remarks on the Significance of Gold Based on Byzantine Ekphraseis of Works of Art
Autorzy:
Garnczarska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1032079.pdf
Data publikacji:
2020-12-23
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Byzantine aesthetics
ekphrasis
gilding
mosaic
marble
Opis:
The abundance of gilding is considered to be a particularly characteristic feature of Byzantine art. This attribute can be confirmed by even a cursory analysis of works of art. In short, Byzantine artists used gold on a large scale, showing great technical skill. It is therefore quite surprising that this issue has not yet received a separate, comprehensive study. Admittedly, researchers recognize the presence of gold but unfortunately, they almost do not go beyond general observations. On the one hand, they emphasize the primary role of the symbolic meanings of gold, and, on the other, they indicate the high material value of this precious metal. These comments are usually very general and their authors rarely refer to specific primary sources. Their observations, however, speak more about present-day ideas about Byzantine culture than about it itself. The indicated problem is an important and extensive task to be done, hence this paper is only an outline of the most important questions, each of which requires a separate and in-depth study. Therefore, this synthetic article introduces the most basic points associated with the understanding of gold in Byzantium. For this purpose, selected examples of Byzantine texts in which their authors referred to gold in a strictly artistic context are analysed. Thus, the main thesis is as follows: in Byzantine painting, gold, one of the most important devices of artistic expression, was used on a large scale primarily for aesthetic reasons.
Źródło:
Studia Ceranea; 2020, 10; 83-121
2084-140X
2449-8378
Pojawia się w:
Studia Ceranea
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 44

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