Overlapped joints in Textile Reinforced Concrete with UHPC matrix: An experimental investigation

When producing a Textile Reinforced Concrete structure or element, joining separate textile layers might be a necessity, driven for example by the limited dimensions of commercially available fabrics. A possible way of producing such joints is by overlapping different textile sheets. Overlapped join...

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Bibliographic Details
Published in:Materials and structures 2021-08, Vol.54 (4), Article 152
Main Authors: Rossi, Edoardo, Randl, Norbert, Harsányi, Peter, Mészöly, Tamás
Format: Article
Language:English
Subjects:
Building construction
Building Materials
Civil Engineering
Concrete structures
Digital imaging
Engineering
Fabrics
Machines
Manufacturing
Materials Science
Original Article
Processes
Reinforced concrete
Reinforcing steels
Solid Mechanics
Steel fibers
Theoretical and Applied Mechanics
Ultra high performance concrete
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Summary:When producing a Textile Reinforced Concrete structure or element, joining separate textile layers might be a necessity, driven for example by the limited dimensions of commercially available fabrics. A possible way of producing such joints is by overlapping different textile sheets. Overlapped joints, however, need to be cast with particular attention since they might represents weak elements of the structure, leading to premature failure. An experimental campaign was performed, aimed at identifying the effects of a symmetric vs non-symmetric arrangement of the textile fabrics within the overlapping length and tensile characteristics of the matrix on such type of joints. Fifteen specimens, produced using a fully epoxy impregnated carbon textile fabric and an Ultra High Performance Concrete (UHPC) matrix, were tested under tension in a uniaxial setup and measurements were performed using a Digital Image Correlation system. The in-plane and out-of-plane behaviour of each specimen was studied. The results highlight the importance of producing symmetric elements as well as the beneficial effects that the admixture of short dispersed steel fibres to the cementitious matrix provide to such kind of joints
ISSN:1359-5997
1871-6873
DOI:10.1617/s11527-021-01739-1