Prohlížení Acta Polytechnica CTU Proceedings. 2017, vol. 13 dle autora "268112fc-5546-4b63-8dc6-b5e3ec99c09c"
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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 ... -
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 ... -
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 ... -
PERFORMANCE OF CEMENT COMPOSITES REINFORCED WITH SURFACE-MODIFIED POLYPROPYLENE MICRO- AND MACRO-FIBERS
Autor: Antoš, Jakub; Dejdar, Lukáš; Trejbal, Jan; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This paper focuses on the mechanical properties investigation of cement pastes reinforced with surface treated polymer fibers. The cement matrix was composed of Portland cement (CEM I 42.5 R, w/c ratio equal to 0.4). Two ... -
PLASMA TREATMENT IMPACT ON PHYSICAL AND CHEMICAL PROPERTIES OF POLYMERIC FIBERS
Autor: Hlůžek, Radim; Prošek, Zdeněk; Trejbal, Jan; Fládr, Josef; Potocký, Štepán
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Presented work focuses on chemical and physical properties of plasma modified polymeric macro-fibers. Polyethylene terephthalate (PET) and polypropylene (PP) fibers having approx. 300 μm in diameter were modified using ... -
PULLOUT BEHAVIOR OF OXYGEN PLASMA TREATED POLYMER FIBERS FROM CEMENT MATRIX
Autor: Trejbal, Jan; Horová, Tereza; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The aim of this work is to describe bonding properties between surface treated polymer fibers and a cement matrix. In order to increase an interaction between the matrix and fiber surfaces, two fiber types having approx. ... -
THE EFFECT OF PLASTICIZER ON MECHANICAL PROPERTIES OF THE CEMENT PASTE WITH FINE GROUND RECYCLED CONCRETE
Autor: Hrůza, Jaromír; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This article deals with the usage of recycled concrete, which arises from the demolition of concrete structures. The work is focused on the development of mechanical properties (Young's modulus, compressive and flexural ...