Improving Resistance of High Strength Concrete (HSC) Bridge Beams to Frost and Defrosting Salt Attack by Application of Hydrophobic Agent

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F17%3A00320520" target="_blank" >RIV/68407700:21610/17:00320520 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1757-899X/236/1/012053" target="_blank" >http://dx.doi.org/10.1088/1757-899X/236/1/012053</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/236/1/012053" target="_blank" >10.1088/1757-899X/236/1/012053</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Improving Resistance of High Strength Concrete (HSC) Bridge Beams to Frost and Defrosting Salt Attack by Application of Hydrophobic Agent

Popis výsledku v původním jazyce

HSC (High Strength Concrete) is increasingly used for bearing bridge structures nowadays. Bridge structures in the Czech Republic are exposed to severe conditions in winter time and durability of the concrete is therefore a crucial requirement. The high strength and low water absorption of HSC suggests that the material will have high durability. However, the situation may not be so straightforward. We carried out a study of the very poor durability of HSC concrete C70/85 used to produce prestresed beams 37.1 m in length to build a 6-span highway bridge. After the beams were cast, a production control test indicated some problems with the durability of the concrete. There was a danger that 42 of the beams would not be suitable for use. All participants in the bridge project finally decided, after extensive discussions, to attempt to improve the durability of the concrete by applying a hydrophobic agent. Paper will present the results of comparative tests of four hydrophobic agents in order to choose one for real application and describes this application on construction site.

Název v anglickém jazyce

Improving Resistance of High Strength Concrete (HSC) Bridge Beams to Frost and Defrosting Salt Attack by Application of Hydrophobic Agent

Popis výsledku anglicky

HSC (High Strength Concrete) is increasingly used for bearing bridge structures nowadays. Bridge structures in the Czech Republic are exposed to severe conditions in winter time and durability of the concrete is therefore a crucial requirement. The high strength and low water absorption of HSC suggests that the material will have high durability. However, the situation may not be so straightforward. We carried out a study of the very poor durability of HSC concrete C70/85 used to produce prestresed beams 37.1 m in length to build a 6-span highway bridge. After the beams were cast, a production control test indicated some problems with the durability of the concrete. There was a danger that 42 of the beams would not be suitable for use. All participants in the bridge project finally decided, after extensive discussions, to attempt to improve the durability of the concrete by applying a hydrophobic agent. Paper will present the results of comparative tests of four hydrophobic agents in order to choose one for real application and describes this application on construction site.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA15-10591S" target="_blank" >GA15-10591S: Vliv dlouhodobého působení přírodmích podmínek na hydrofóbní vlastnosti povrchových vrstev</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Building up Efficient and Sustainable Transport Infrastructure 2017 (BESTInfra2017)

ISBN

—

ISSN

1757-8981

e-ISSN

1757-899X

Počet stran výsledku

8

Strana od-do

422-429

Název nakladatele

IOP Publishing Ltd

Místo vydání

Bristol

Místo konání akce

Praha

Datum konání akce

20. 9. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000417428700053