Prohlížení ČVUT - elektronické publikace dle autora "268112fc-5546-4b63-8dc6-b5e3ec99c09c"
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ASSESSMENT OF ADHESION BETWEEN MINERAL AGGREGATE AND BITUMINOUS BINDER USING DIGITAL IMAGE ANALYSIS
Autor: Trejbal, Jan; Prošek, Zdeněk; Valentová, Tereza
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)This work presents how to assess a rate of adhesion between bituminous binder and mineral aggregate. Asphalt mixtures composed from grade bitumen 50/70, reference or modified with adhesion promoters based on amines, and ... -
CEMENT MATRIX CONTAINING MICRONIZED RECYCLED CONCRETE AND THE INFLUENCE OF ADDITIVES
Autor: Ďureje, Jakub; Prošek, Zdeněk; Hrůza, Jaromír; Tesárek, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)The article deals with the selection of a suitable additives in cement composite material for the production of a masonry block. The blocks contains recycled concrete which replacing 40% cement. The recyclate comes from ... -
CEMENT PASTE CONTAINING MICRONIZED RECYCLED CONCRETE - INFLUENCE OF HARDENING ACCELERATORS ON THE MODULUS OF ELASTICITY
Autor: Ďureje, Jakub; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)The article deals with the selection of a suitable hardening accelerator for cement composite material for mass production of masonry blocks. The blocks contain cement and finely ground recycled concrete in ratio 1:1. Three ... -
Dependence of mechanical and thermal properties on the composition of lightweight gypsum composites
Autor: Sekavová, Hana; Prošek, Zdeněk; Tesárek, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)One of the ways to use the treated gypsum waste is in gypsum mixtures for the production of gypsum blocks. Gypsum blocks can be used in standard interior as well as exterior applications and are made of gypsum, water, PP ... -
Detection of the presence of microorganisms during production of plasterboard
Autor: Sekavová, Hana; Prošek, Zdeněk; Karra’a, George
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The article introduces possibility how to use special material from plasterboard back to the production of plasterboards. The recycled material was prepared from standard plasterboards KNAUF WHITE (it means plasterboard ... -
DETECTION OF THE PRESENCE OF MICROORGANISMS DURING PRODUCTION OF PLASTERBOARD
Autor: Sekavová, Hana; Prošek, Zdeněk; Ryparová, Pavla
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This article is focused on detection microorganisms appearing during production of gypsum plasterboards. The research is carried out within the project TAČR ZÉTA TJ02000235 Sádrokarton se zvýšenou odolností proti bilogické ... -
Environmental perspectives of fine grounded concrete powder: LCA case study of light-weight concrete block
Autor: Pešta, Jan; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The construction elements produced with low demand for primary resources are being developed in the building industry. However, not only consumption of primary resources but also environmental impacts of such products ... -
EVALUATION OF MICROMECHANICAL PROPERTIES OF CARBON FIBER FABRIC USING NANOINDETATION
Autor: Klapálek, Pavel; Prošek, Zdeněk; Jíra, Aleš; Melzerová, Lenka
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This paper is focused mainly on nanoindentation of carbon fibers. Fibers are in form of carbon fiber fabric that is used in larger research that is focused on reinforcing beams made of glued laminated timber. Knowledge of ... -
FOAMED CEMENT COMPOSITES: DETECTION OF THE MODULUS OF ELASTICITY USING DIC ANALYSIS AND COMPARISON WITH OTHER METHODS
Autor: Ďureje, Jakub; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)A modulus of elasticity was determined for eight differently foamed cement paste samples. Samples were loaded in the laboratory by a hydraulic press. The force acting on the sample was read directly from the laboratory ... -
HYDRATION PROCESS AND MECHANICAL PROPERTIES OF CEMENT PASTE WITH RECYCLED CONCRETE POWDER AND SILICA SAND POWDER
Autor: Topič, Jaroslav; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Recycled concrete powder (RCP) mostly consisting of cement paste could be reused as partial cement replacement. The aim of this paper is to compare hydration and mechanical properties of RCP and two types of silica sand ... -
INCREASING THE BIOLOGICAL RESISTANCE OF GYPSUM BY MEANS OF SILVER, CALCIUM AND COPPER IONS
Autor: Prošek, Zdeněk; Sekavová, Hana; Ryparová, Pavla
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The article focuses on the effects of additives increasing biological resistance of gypsum against degradation of the material. In this study we use silver nitrate, calcium oxide and copper sulphate as an additive that ... -
Influence of microstructure on rate-dependent response of unidirectional fibrous composites
Autor: Valentová, Soňa; Šejnoha, Michal; Vorel, Jan; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper outlines prediction of the macroscopic response of unidirectional fibrous composites made either from basalt or carbon fibers impregnated by a polymeric epoxy matrix. The viscoelastic response of the matrix phase ... -
Influence of oxygen and argon plasma treatment on wettability and surface morphology of polypropylene microfibers
Autor: Ďureje, Jakub; Prošek, Zdeněk; Trejbal, Jan; Potocký, Štepán; Tesárek, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The surface treatment of polypropylene microfibers by plasma processing in oxygen and argon was studied with the motivation to increase their cohesion with the cement matrix. By plasma treatment, it is possible to modify ... -
LONG-TIME INVESTIGATION OF CEMENT COMPOSITE MATERIAL WITH MICRONIZED WASTE MARBLE POWDER: DYNAMIC MODULES
Autor: Prošek, Zdeněk; Topič, Jaroslav
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This article focus on “blended cement”. The blended cement was created by using waste marble powder (WMP) as a partial replacement for cement. We investigated the influence of WMP on the developing of the dynamic modulus ... -
LONG-TIME INVESTIGATION OF CEMENT PASTES WITH MICRONIZED OLD CONCRETE, INFLUENCE OF DIFFERENT TYPE OF MIXING APPROACH ON MECHANICAL PROPERTIES
Autor: Prošek, Zdeněk; Tesárek, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)The article focuses on the impact of different type of mixing approach on resulting mechanical properties of cement composites. The monitored parameters of the mixing approach were the speed of mixing and the method of ... -
MECHANICAL AND CHEMICAL ACTIVATION OF BLAST FURNACE SLAG AND ITS INFLUENCE ON THE MECHANICAL PROPERTIES OF THE RESULTING CEMENT PASTE
Autor: Horych, Jan; Tesárek, Pavel; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The usage of waste materials is a very important global topic. The large amount of waste everywhere in the world needs to be processed or disposed. Landfilling is not an option anymore, because of European legislation and ... -
MECHANICAL PROPERTIES IMPROVEMENT OF FIBER REINFORCED CONCRETE
Autor: Trejbal, Jan; Nežerka, Václav; Hlůžek, Radim; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)Fiber reinforced concrete mechanical properties are limited due to low adhesion between polymer fibers and cement matrix. To ensure a strong interaction between the two materials, polypropylene fibers (d = 0.305mm) were ... -
MECHANICAL PROPERTIES OF CEMENT COMPOSITE CONTAINING RECYCLED CONCRETE AND ALKALI ACTIVATED BLAST FURNACE SLAG
Autor: Horych, Jan; Tesárek, Pavel; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)Recycling of materials is very popular and very important in these days. Finding the new ways to process and use these materials is a key to get rid of a lot of construction waste. The amount of landfilling needs to be ... -
MICRO-MECHANICAL PERFORMANCE OF CONCRETE USED AS RECYCLED RAW MATERIAL IN CEMENTITIOUS COMPOSITE
Autor: Hrbek, Vladimír; Koudelková, Veronika; Prošek, Zdeněk; Tesárek, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The reduction of industrial pollution is recently one of main goals over all fields. In civil engineering, re-cycling of structural waste provides wide opportunity contributing this effort. This paper focus on re-use of ... -
MICRONIZED CONCRETE POWDER AS MIRCOFILLER IN CEMENT PASTE: INFLUENCE ON HYDRATION AND STRUCTURE
Autor: Topič, Jaroslav; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)The reuse of old concrete as a coarse and fine recycled aggregate in cement composites is relatively well researched, and therefore a very fine fraction of recycled concrete was used in this paper. When using a very fine ...