STRENGTHENING OF CONCRETE STRUCTURES USING UHPC

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00362653" target="_blank" >RIV/68407700:21110/22:00362653 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21610/22:00362653

Result on the web

<a href="https://www.fib-international.org/publications/fib-proceedings/6th-i-fib-i-international-congress-in-oslo,-norway-2022-proceedings-em-pdf-em-detail.html" target="_blank" >https://www.fib-international.org/publications/fib-proceedings/6th-i-fib-i-international-congress-in-oslo,-norway-2022-proceedings-em-pdf-em-detail.html</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

STRENGTHENING OF CONCRETE STRUCTURES USING UHPC

Original language description

UHPC (ultra-high performance concrete) is a material with very high mechanical properties, as well as with an excellent durability. It is very suitable for strengthening of existing structures. Additional layer of UHPC cast on the top of existing slabs or beams provides substantial increase of load carrying capacity and it can also provide a barrier against water. Such strengthening is very promising because of several reasons. 1. High strength of UHPC layer makes the strengthening very efficient. 2. Relatively thin layer of UHPC represents only a small additional load of an existing structure. 3. Excellent bond between UHPC and existing concrete makes it possible to omit mechanical connectors. 4. At bridges, the UHPC layer can substitute a waterproofing. Extensive experimental program was executed in co-operation of the University with the producer of ready-mixed concrete and with the contracting company. The different structural elements strengthened by the UHPC layer were tested in bending, shear, punching and compression. Old precast elements were used for strengthening, so that an interaction of old concrete and UHPC could be realistically modelled. Long-term tests were executed on strengthened slabs subjected to bending. Small models of concrete columns strengthened by jacketing with UHPC were subjected to short-term tests and to long-term tests. The long-term load of about 1000 kN was developed using special loading frames with springs. A self-compacting UHPC was modified for applications, where casting of the top layer in slope up to 8% is necessary. The experimental results including the bond tests were evaluated and the conclusions for design were drawn. The results of experimental works and conclusions applicable for the design are presented in the paper.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/FV20472" target="_blank" >FV20472: Application of high performance cementitious composites at rehabilitation of concrete structures</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Concrete Innovation for Sustainability. Proceedings for the 6th fib International Congress

ISBN

978-2-940643-15-8

ISSN

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e-ISSN

2617-4820

Number of pages

10

Pages from-to

2248-2257

Publisher name

fib - fédération internationale du béton

Place of publication

Lausanne

Event location

Oslo

Event date

Jun 12, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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