Experimental investigation of the folding behaviour of extruded cement-bound concretes
Experimental investigation of the folding behaviour of extruded cement-bound concretes
Type of document
diplomová prácemaster thesis
Author
Ludwig Werum
Supervisor
Kalthoff Matthias
Opponent
Matschei Thomas
Field of study
Building StructuresStudy program
Civil EngineeringInstitutions assigning rank
katedra betonových a zděných konstrukcíRights
A university thesis is a work protected by the Copyright Act. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one?s own expense. The use of thesis should be in compliance with the Copyright Act http://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf and the citation ethics http://knihovny.cvut.cz/vychova/vskp.htmlVysokoškolská závěrečná práce je dílo chráněné autorským zákonem. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem http://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf a citační etikou http://knihovny.cvut.cz/vychova/vskp.html
Metadata
Show full item recordAbstract
The innovative and high-performance building material textile reinforced concrete (TRC) has the potential to significantly reduce the enormous resource consumption and CO2 emissions of the construction industry. To exploit the full potential of this revolutionary building material, however, innovative construction principles are required. Based on the form-follows-force principle, new ideas for structural component geometries can be found in nature, mathematics, and mechanics. In order to produce the found shapes, adequate manufacturing methods are required. Generative manufacturing by means of extrusion is an efficient method to produce filigree TRC components. Within the scope of this master’s thesis the subsequent forming or folding behavior of extruded fiber reinforced concrete (FRC) and TRC has been investigated. Furthermore, the influence of different fiber types and contents was analyzed. For this purpose, new folding tools were developed first, which allowed the production of specimens with varying bending radii in transverse and longitudinal direction. Thus, strongly curved specimens were produced using the fold in fresh principle. TRC specimens exhibited lower flexibility, which resulted in defects at significantly larger bending radii. Moreover, double-curved specimens were produced and tested in three-point bending tests for their flexural strength. The TRC specimens showed no significant resistance after the critical crack, which led to brittle failure in the FRC specimens. This behavior can be traced back to the test setup, which allowed large horizontal deformations. A possible future use of these double-curved elements is a structural system for ceilings. The innovative and high-performance building material textile reinforced concrete (TRC) has the potential to significantly reduce the enormous resource consumption and CO2 emissions of the construction industry. To exploit the full potential of this revolutionary building material, however, innovative construction principles are required. Based on the form-follows-force principle, new ideas for structural component geometries can be found in nature, mathematics, and mechanics. In order to produce the found shapes, adequate manufacturing methods are required. Generative manufacturing by means of extrusion is an efficient method to produce filigree TRC components. Within the scope of this master’s thesis the subsequent forming or folding behavior of extruded fiber reinforced concrete (FRC) and TRC has been investigated. Furthermore, the influence of different fiber types and contents was analyzed. For this purpose, new folding tools were developed first, which allowed the production of specimens with varying bending radii in transverse and longitudinal direction. Thus, strongly curved specimens were produced using the fold in fresh principle. TRC specimens exhibited lower flexibility, which resulted in defects at significantly larger bending radii. Moreover, double-curved specimens were produced and tested in three-point bending tests for their flexural strength. The TRC specimens showed no significant resistance after the critical crack, which led to brittle failure in the FRC specimens. This behavior can be traced back to the test setup, which allowed large horizontal deformations. A possible future use of these double-curved elements is a structural system for ceilings.
Collections
- Diplomové práce - 11133 [460]
Related items
Showing items related by title, author, creator and subject.
-
Numerická analýza materiálového modelu cementového kompozitu
Author: Matějka Jan; Supervisor: Fornůsek Jindřich; Opponent: Vavřiník Tomáš
(České vysoké učení technické v Praze. Vypočetní a informační centrum.Czech Technical University in Prague. Computing and Information Centre., 2017-05-19)Účelem této práce bylo provedení numerické analýzy popisující chování speciálního vysokopevnostního drátkobetonu (UHPFRC) vyvinutého v Experimentálním centu na Fakultě stavební ČVUT v Praze při zkoušce v tříbodovém ohybu ... -
Rekonstrukce průmyslových staveb - vliv karbonatace betonu na životnost konstrukce
Author: Vejvara Luděk; Supervisor: Witzany Jiří
(České vysoké učení technické v Praze. Vypočetní a informační centrum., 2013-01-16)Karbonatace betonu je důležitý chemický a fyzikální jev, který zasahuje veškeré nosné železobetonové konstrukce staveb. Základní podstatou celého tohoto jevu je to, že v betonu dochází působením vzdušného oxidu uhličitého ... -
Beton v českém stavebnictví
Author: Janák Ondřej; Supervisor: Měšťanová Dana; Opponent: Macek Daniel
(České vysoké učení technické v Praze. Vypočetní a informační centrum.Czech Technical University in Prague. Computing and Information Centre., 2015-01-23)Bakalářská práce se zabývá betonem, ve smyslu stavebního materiálu uplatňujícího se především v českém stavebnictví. Text práce popisuje, co to vlastně beton je, z čeho se vyrábí a jak jsou betony děleny, podle svého stavu, ...