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Research report 2013-11-10 Calcite_SS3
Kumpová, Ivana; Vopálenský, Michal; Vavřík, Daniel
2017 - English
Porosity was measured on a irregular sample of calcite, designated Calcite_S43, using the TORATOM device in the Centre of Excellence Telč.
Keywords:
calcite; TORATOM; porosity
Available at various institutes of the ASCR
Research report 2013-11-10 Calcite_SS3
Porosity was measured on a irregular sample of calcite, designated Calcite_S43, using the TORATOM device in the Centre of Excellence Telč.
Research report 2013-11-19 Calcite_S43
Kumpová, Ivana; Vopálenský, Michal; Vavřík, Daniel
2017 - English
Porosity was measured on a irregular sample of calcite, designated\nCalcite_S43, using the TORATOM device in the Centre of Excellence Telč.\n
Keywords:
calcite; TORATOM; measuring
Available at various institutes of the ASCR
Research report 2013-11-19 Calcite_S43
Porosity was measured on a irregular sample of calcite, designated\nCalcite_S43, using the TORATOM device in the Centre of Excellence Telč.\n
Research report 2013-11-19 Calcite_S11
Kumpová, Ivana; Vopálenský, Michal; Vavřík, Daniel
2017 - English
Porosity was measured on a irregular sample of calcite, designated Calcite_S11, using the TORATOM device in the Centre of Excellence Telč.
Keywords:
calcite; TORATOM; measuring
Available at various institutes of the ASCR
Research report 2013-11-19 Calcite_S11
Porosity was measured on a irregular sample of calcite, designated Calcite_S11, using the TORATOM device in the Centre of Excellence Telč.
The concept of "end of waste" and recycling of hazardous materials: in depth characterisation of the product of thermal transformation of cement-asbestos
Viani, Alberto
2013 - English
Since many decades, the solution to social and technological problems is made possible by the application of innovative concepts or ideas inspired by Nature. Although this might seem a novel approch, it is indeed a very old scientific method. One of the most outstanding examples is represented by the drawings and models realised by Leonardo da Vinci, which reveal how the most famous inventor of the Renaissance period developed his scientific knowledge through the study of nature. The term Nature-inspired actually means “ideas inspired by Nature” and was recently subjected to a sort of speciation process which branched expressions like geo-inspiration, bio-inpiration and many more (Darder et al., 2007). Geoinspiration denotes the wealth of motivations that materials’ scientists can borrow from the mineral world. It can be a powerful tool to solve modern human problems such as the management of wastes, a global concern of the modern world.
Keywords:
thermal transformation of cement-asbestos; "end of waste"; hazardous waste
Available at various institutes of the ASCR
The concept of "end of waste" and recycling of hazardous materials: in depth characterisation of the product of thermal transformation of cement-asbestos
Since many decades, the solution to social and technological problems is made possible by the application of innovative concepts or ideas inspired by Nature. Although this might seem a novel ...
Numerical and experimental models of atmospheric boundary layer turbulent characteristic interacting with building stuctures
Pospíšil, Stanislav; Kuznetsov, Sergeii
2013 - English
Modelling a flow around low objects of non-aerodynamic shapes brings many problems and this applies to both numerical and physical simulations. The aim of the paper is to compare results of the physical and numerical modelling of an air-flow around an object of the shape of a cube with an edge of 0.24 m. It represents the so-called Silsoe cube with a scale of 1:25 that has gradually become a standardized experimental element in the field of building aerodynamics. The reason for this choice is the possibility of using informative data from measurement in the tunnel to assess the final results of both approaches.
Keywords:
building aerodynamics; wind tunnel; modelling a flow around low objects
Available at various institutes of the ASCR
Numerical and experimental models of atmospheric boundary layer turbulent characteristic interacting with building stuctures
Modelling a flow around low objects of non-aerodynamic shapes brings many problems and this applies to both numerical and physical simulations. The aim of the paper is to compare results of the ...
Mechanism of damage of quasi-brittle surface layer - the case of plasters from the façade of Valtice Castle
Drdácký, Miloš; Pérez-Estébanez, Marta; Viani, Alberto
2013 - English
The Valtice Castle was built at the beginning of the XVIII century for the Liechtenstein family. Part of it now serves as a museum while some wings have been transformed into a hotel, restaurant and nightclub complex. It is sitted in a small town with the same name in the South Moravian region of the Czech Republic. The plaster on the façade of the Castle is damaged by quasi-brittle fracture.
Keywords:
quasi brittle fracture; materials analysis; plaster
Available at various institutes of the ASCR
Mechanism of damage of quasi-brittle surface layer - the case of plasters from the façade of Valtice Castle
The Valtice Castle was built at the beginning of the XVIII century for the Liechtenstein family. Part of it now serves as a museum while some wings have been transformed into a hotel, restaurant and ...
Reaction kinetics of magnesium phosphate cements
Viani, Alberto; Pérez-Estébanez, Marta
2013 - English
Magnesium phosphate cements (MPCs), are a class of new binders developed to reduce the ecological impact of construction. When magnesium oxide reacts with potassium dihydrogen phosphate (KH2PO4) (KDP) in presence of water, crystallization of magnesium potassium phosphate hydrate (MKP) occurs, according to the reaction: MgO + KH2PO4 + 5H2O --> MgKPO4·6H2O. Despite the importance of MPC for a wide range of applications, including rapid concrete repair, recycling of hazardous wastes, waste encapsulation, bone repair, natural fibre composites, no data are available on hydration reaction kinetics.
Keywords:
magnesium phosphate cements; materials analysis; reaction kinetics
Available at various institutes of the ASCR
Reaction kinetics of magnesium phosphate cements
Magnesium phosphate cements (MPCs), are a class of new binders developed to reduce the ecological impact of construction. When magnesium oxide reacts with potassium dihydrogen phosphate (KH2PO4) ...
Accuracy of internal and external standard method in quantitative analysis by X-ray powder diffraction
Pérez-Estébanez, Marta; Viani, Alberto
2013 - English
The X-ray powder diffraction method is known to convey information on the phase composition of samples. Obtaining an accurate quantification of these phases has been long precluded. With the advent of the Rietveld method [1] this became possible. Hedemonstrated the possibility to extract accurate structural information from neutron powder diffraction data. Later, his approach has been extended to x-ray powder diffraction data with successful results. The basics of the Rietveld method lays on the complete exploitation of the whole powder profile without extracting the integrated intensities. The structural information are obtained by fitting the entire profile of the measured diffraction pattern to a calculated diffraction profile. The refinement procedure implements the least square regression and it requires a reasonable scheme of starting values that approximate the real datum.
Keywords:
X-ray powder diffraction; standard method; Rietveld method
Available at various institutes of the ASCR
Accuracy of internal and external standard method in quantitative analysis by X-ray powder diffraction
The X-ray powder diffraction method is known to convey information on the phase composition of samples. Obtaining an accurate quantification of these phases has been long precluded. With the advent ...
The investigation of fatigue oscillations induced wind loads on cables with of cable supported bridges
Pospíšil, Stanislav; Kuznetsov, Sergeii; Gorski, P.; Tatara, Marcin; Marušić, Ante
2013 - English
The objective of the project is an implementation of model tests in order to investigate of fatigue oscillations induced wind loads on cables with ice of cable supported bridges. The experimental studies are carried out in a wind tunnel laboratory climate chambre of the Czech Academy of Sciences in Telč within the CET Start-up pilot project.
Keywords:
cable supported bridges; wind tunnel; fatigue oscillations
Available at various institutes of the ASCR
The investigation of fatigue oscillations induced wind loads on cables with of cable supported bridges
The objective of the project is an implementation of model tests in order to investigate of fatigue oscillations induced wind loads on cables with ice of cable supported bridges. The experimental ...
Characterisation of historic materials - the case of Tao-I-Kisra Palace (Iraq)
Slížková, Zuzana; Pérez-Estébanez, Marta; Viani, Alberto
2013 - English
The aim of this study is the characterization of bricks from the Taq-I-Kisra palace in southern Iraq (ancient Mesopotamian area). The palace is located in the plain of the Tigri river (see Fig. 1). The construction probably started around year 540 AD even if there is some uncertainty about its age. The arched hall on the facade is about 37 m high and is the largest vault ever constructed at the time (see Fig. 2). Originally conceived as an imperial palace, was later used as a mosque by the Arabs before being gradually abandoned. The historical constructions in this area are what remains of the capital of the empire. In accordance with geological data, in the area where the temple was built (and in general in the Mesopotamian area), the most available construction material was mud. Mud bricks were made mainly of clays. In ancient times there is evidence of mixes with sand, water, mud, and organic material, husks or straw.
Keywords:
materials analysis; historic mortar; mud bricks
Available at various institutes of the ASCR
Characterisation of historic materials - the case of Tao-I-Kisra Palace (Iraq)
The aim of this study is the characterization of bricks from the Taq-I-Kisra palace in southern Iraq (ancient Mesopotamian area). The palace is located in the plain of the Tigri river (see Fig. 1). ...
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