Acta Polytechnica CTU Proceedings. 2019 ( vol. 21-25): Poslední příspěvky

Zobrazují se záznamy 61-72 z 72

    • GLASS WASTE POWDER UTILIZATION IN HIGH PERFORMANCE CONCRETE 

      Autor: Mariaková, Diana; Vlach, Tomáš; Pavlů, Tereza
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper deals with investigation of high-performance concrete (HPC) with full replacement of the silica powder by the waste glass powder. The silica powder was replaced by two types of the waste glass powder, originated ...

    • RECYCLING AND ITS USE IN CONCRETE WASTE PROCESSING BY HIGH-SPEED MILLING 

      Autor: Prošek, Zdeněk; Tesárek, Pavel; Trejbal, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This article discusses the possibility of recycling of concrete waste using the high-speed milling method. The resulting of milling is micronize old concrete. Used old concrete was created by crushing of old concrete, which ...

    • RESISTANCE OF MORTARS WITH GYPSUM, LIME AND COMPOSITE BINDERS AGAINST MOLDS 

      Autor: Krejsová, Jitka; Doleželová, Magdaléna
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Resistance of three mortars (the lime mortar, the gypsum mortar and the mortar with the composite binder) against molds was evaluated. Mortars were also compared according to their pH, bulk density, strength and porosity. ...

    • THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS 

      Autor: Pokorný, Jaroslav; Pavlíková, Milena; Pavlík, Zbyšek
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      Lime-based renders are common part of historical or older buildings that don’t always provide a comfortable inside climate due to the problems with high thermal losses. Thermal insulation renders may possibly retrofit or ...

    • RECYCLING OF CONSTRUCTION WASTE USING HIGH-SPEED MILLING PROCESS: DETERMINATION OF WASTE CONCRETE 

      Autor: Prošek, Zdeněk; Tesárek, Pavel; Trejbal, Jan; Horová, Tereza
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper deals with the use of high-speed milling process for recycling old concrete and direct determination of the potential of input waste. For this purpose, three different types of waste concrete were used: prefabricated ...

    • EXPERIMENTAL VERIFICATION OF IMPREGNATED TEXTILE REINFORCEMENT SPLICING BY OVERLAPPING 

      Autor: Vlach, Tomáš; Laiblová, Lenka; Řepka, Jakub; Jirkalová, Zuzana; Hájek, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper presents an experimental verification of impregnated textile reinforcement splicing by overlapping using tensile test of small textile reinforced concrete slabs before its using in the product. The specimen ...

    • 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 ...

    • USING SECONDARY RAW MATERIALS IN LIGHTWEIGHT OPEN-STRUCTURE CONCRETE WITH GOOD UTILITY PROPERTIES 

      Autor: Sedlmajer, Martin; Zach, Jiří; Bubeník, Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper presents the results of research in lightweight concrete with open structure made using a lightweight porous foam-glass aggregate produced from recycled glass powder. The goal was to develop lightweight concrete. ...

    • CHARACTERIZATION OF LIGHTWEIGHT LIME MORTARS CONTAINING BRICK WASTE POWDER 

      Autor: Vyšvařil, Martin; Žižlavský, Tomáš; Bayer, Patrik; Rovnaníková, Pavla
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This work deals with the effects of an expanded perlite (EP) on the hardened properties of air lime mortars with a 50% brick waste powder content. The influence of different substitution of quartz sand by EP is also monitored ...

    • CHLORIDE RESISTANCE OF NANO-PARTICLE REPAIRED CONCRETE 

      Autor: Šulc, Rostislav; Himmel, Michal; Němeček, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper describes the results of the experimentally modeled chloride ion penetration into different quality concrete structures with fully developed carbonation. Parts of concrete samples were further treated, to increase ...

    • THE PHYSICAL PROPERTIES OF CEMENTITIOUS COMPOSITES FOR APPLICATIONS IN A HIGH-TEMPERATURE ENERGY STORAGE DEVICE 

      Autor: Šťastník, Stanislav; Bodnárová, Lenka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The article was focused on experimental verification of the identification of thermal characteristics of high-performance cementitious composites at elevated temperatures. The purpose of the research was to verify the ...

    • DURABILITY OF CONCRETE WITH BINDER BASED ON SULFOCALCIC FLY ASH 

      Autor: Šulc, Rostislav; Krása, Matouš; Formáček, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      This paper deals with the durability of concrete with binder based on sulfocalcic fly ash. At the beginning, in the theoretical part, there is a research on the frost resistance of concrete, its resistance to chemical thaw ...