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| Description
| - Gypsum free cement (GFC) is based on Portland clinker. Gypsum as an initial setting time regulation additive is replaced by a system based on lignosulfonane of alkali metal and carbonate of alkali metal. This binder features high initial strength and short initial setting time; subsequently, these properties continue in concretes made with this binding material. Concrete with gypsum-free cement is characterized with short setting time and high initial strength. Concrete with gypsum-free cement has comparable strength after 3 days of curing with a 28 days strength of common concrete with Portland cement containing gypsum. Our paper describes methodology and calibration relations for both - GFC strength determination through ultrasonic pulse velocity and strength determination of types of concrete made with GFC using ball thrust hardness test. The last-named method is applicable for GFC compression strength determination; and also for types concrete based on GFC, commendable are impact hammers (Schmidt
- Gypsum free cement (GFC) is based on Portland clinker. Gypsum as an initial setting time regulation additive is replaced by a system based on lignosulfonane of alkali metal and carbonate of alkali metal. This binder features high initial strength and short initial setting time; subsequently, these properties continue in concretes made with this binding material. Concrete with gypsum-free cement is characterized with short setting time and high initial strength. Concrete with gypsum-free cement has comparable strength after 3 days of curing with a 28 days strength of common concrete with Portland cement containing gypsum. Our paper describes methodology and calibration relations for both - GFC strength determination through ultrasonic pulse velocity and strength determination of types of concrete made with GFC using ball thrust hardness test. The last-named method is applicable for GFC compression strength determination; and also for types concrete based on GFC, commendable are impact hammers (Schmidt (en)
- Bezsádrovcový cement (GFC -gypsum free cement) je pojivo na bázi portlandského slinku ve kterém je přísada pro regulaci počátku tuhnutí sádrovec nahrazena systémem lignosulfinanem alkalichého kovu a uhličitanem alkalického kovu. Toto pojivo se vyznačuje vysokými počátečními pevnostmi a rachlým počátkem tuhnutí, tyto vlastnosti se následně přenáší i na betony vyrobené s tímto pojivem. V článku je uvedena metodika a kalibrační vztahy jednak pro určování pevností bezsádrovcových cementů z rychlosti šíření ultrazvuku a jednak pro zjišťování pevností betů s bezsádrovcových cementů s využitím tvrdoměrné odrazové metody a ultrazvukové impulsové metody. Ultrazvuková impulsová metoda je využitelná pro zjišťování pevností v tlaku GFC. Pro zjišťování pevností v tlaku betonů s GFC jsou využitelný odrazové tvrdoměry (system Schmidt typ N a L - PROCEQ, Švýcarsko), ultrazvuková metoda je využitelná za předpokladu neměnných s (cs)
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| Title
| - Gypsum free cements and concretes made with them: strength determination using nondestructive testing methods
- Gypsum free cements and concretes made with them: strength determination using nondestructive testing methods (en)
- Zjišťování pevností bezsádrovcových cementů a betonů z nich vyrobených s využitím nedestruktivních zkušebních metod (cs)
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| skos:prefLabel
| - Gypsum free cements and concretes made with them: strength determination using nondestructive testing methods
- Gypsum free cements and concretes made with them: strength determination using nondestructive testing methods (en)
- Zjišťování pevností bezsádrovcových cementů a betonů z nich vyrobených s využitím nedestruktivních zkušebních metod (cs)
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| skos:notation
| - RIV/00216305:26110/07:PU69698!RIV08-MSM-26110___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216305:26110/07:PU69698
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Non-destructive testing, Cement, Concrete, Compression strength, Impact Hammer, Ultrasonic pulse velocity (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - DE - Spolková republika Německo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - The e-Journal of Nondestructive Testing
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Brožovský, Jiří
- Zach, Jiří
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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