Časopisy: Poslední příspěvky
Zobrazují se záznamy 21-40 z 1896
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Possibilities of replacing natural sand in concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This study explores the potential of using fine recycled aggregate (FRA) to replace natural sand in concrete production. The research was divided into two parts. In the first part, natural aggregate’s complete fine fraction ... -
P-LDPC coded image transmission with OFDM over underwater acoustic channel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Underwater environment is still an attractive area to explore and exploit by human beings. However, underwater characteristics limit communications due to harsh channel conditions, and efficient channel codes are essential ... -
Characteristics of fibres based on secondary raw materials and their use in concrete technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to ... -
Concrete mixtures with photovoltaic panels glass: a review of the situation in Czech Republic
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Solar energy production was initiated in the 1990s following by rapid increase of the use of photovoltaic (PV) technology. Most of older solar panels in the Czech Republic were installed between 2000 and 2006 and a global ... -
Czechoslovakia/Czech Republic as a leader in polymer technologies in Central Europe: from contact lenses to 3D printing
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The Czech Republic prides itself on a long-standing tradition in the scientific field of polymer studies and technologies. Seen in this light, the following article seeks to single out this particular tradition and to ... -
Preparation of light fraction silicate filer after the mining for the base layers’ road construction
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The article main objective was eco-innovation in the field of utilization and creation of a complex waste-free technology for the separation of components during ore extraction with subsequent processing, recovery of mine ... -
The importance of using active thermal protection following restoration work on old buildings
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The paper deals with the issue of humidity and the unhealthy environment of old buildings. Humidity is a very widespread problem not only in historical buildings, but also in newer buildings. This problem can be observed ... -
Parameters of back filling material prepared from mine tailing, fly ash, and mine water
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The article investigates the influence of mine tailing, fly ash, and mine water on strength parameters as mine paste filling material performing the strength tests on different recipes of mortar mixes with individual types ... -
Analysis of concrete taken from a loaded column by determining the modulus of elasticity
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Sustainability places an emphasis on preserving and using existing structures, particularly those that are historically or artistically valuable. The preservation of buildings is closely related to a good assessment of ... -
Cementitious material development for additive fabrication
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)For the 3D STAR project and 3D printing purposes, a special fine-grained cement mixture from locally available raw materials was developed. The reason for the development of the custom mixture was the possibility of arbitrary ... -
Emanuel Šlechta, engineer and entrepreneur in the First Republic of Czechoslovakia
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This article traces the political, economic, and technical activities of Professor Emanuel Šlechta in the pre-war period and just after 1945. The aim is to answer the question: “What were Emanuel Šlechta’s activities during ... -
Landmark emancipation of technical intelligence in pre-World War II Czechoslovakia
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This paper describes the development, activities, and both the scientific and social contributions of the Masaryk Academy of Labour, Czechoslovakia’s first technically oriented scientific institute and a major centre of ... -
Prague postal time service: clock and sirens – improbable connection
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The goal of this paper is to present the origin, development, and technical parameters of the Postal Time Service, which was established in the capital of Czechoslovakia – Prague, gradually in the years 1933–1935. It also ... -
A geopolitics of the diaspora of British engineers in South America in the first half of the 20th century: the cases of the Institution of Locomotive Engineers centre in Argentina
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The circulation of British engineers in South America during the first half of the twentieth century is a barely explored phenomenon that should be studied in the basis of methodologies that articulate the different elements ... -
Progress versus tradition – traditional craftsmanship and attempts at industrial tower clock production in the Czech lands in the 19th century
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)With the growing need for accurate timekeeping, the demand for clocks on public buildings increased in the 19th century. The only way to meet the demand, however, was to produce individual items by hand. Due to the ... -
Utilization of high fly ash dosage to reduce cement consumption in concrete formulations
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The concrete production is responsible for high proportion of total carbon dioxide emission due to enormous consumption of Portland cement. This traditional binder system is due to high autogenous emission during calcination ... -
Parametric optimisation of laser welding of stainless steel 316L
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This paper presents numerical and experimental studies focused on the optimisation of laser welding parameters for AISI 316L stainless steel. The focus of the numerical studies was to obtain the mathematical model with the ... -
Verification of material characteristic of natural fibers for concrete reinforcement
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The topic of the article is the verification of the tensile mechanical characteristics of selected natural fibres commonly available on the Czech market. Due to their high tensile strengths, some natural materials have a ... -
Processing and recycling of aggregate residues after ore extraction for stabilization of mined areas
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The article focuses on the treatment and recycling of aggregate. It also addresses the issue of treatments effects on mine tailings, fly ash and acid mine water on the measured parameters of concrete with load-bearing and ... -
Analysis of the effect of hydration heat resulting in the formation of cracks on the experimental block of the spillway at Orlik reservoir
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This article concentrates on the numerical analysis of hydration heat resulting in formation of cracks on the experimental block of the spillway at Orlik Reservoir and its verification with the experimental measurement. ...