Durability of Two Types of HPC at Sulphate Solution Environment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00302243" target="_blank" >RIV/68407700:21110/17:00302243 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.722.66" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.722.66</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.722.66" target="_blank" >10.4028/www.scientific.net/KEM.722.66</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Durability of Two Types of HPC at Sulphate Solution Environment

Popis výsledku v původním jazyce

Sulphate attack of concrete and cement composites comprises sulphate ions migration into the material porous space and their following reaction with hydration products in the presence of water. Newly formed compounds initiate filling of porous space and volume expansion. Sulphate corrosion phenomenon still belongs to the main mechanism affecting the durability and service life of concrete structures. This paper deals with the investigation of sulphate resistance of two types of High Performance Concrete (HPC) exposed for 168 days to sodium sulphate water solution and reference environment of distilled water. Corrosive action is monitored at chosen time periods nondestructively, i.e. using measurement of length and mass changes, basic physical characteristics and dynamic moduli. Additionally, destructive tests of mechanical parameters are realised. For samples immersed in distilled water, improvement in mechanical strength is observed for the both studied HPCs. In case of HPC C I containing crushed aggregate, the improvement of mechanical resistivity is observed for samples exposed to sulphate solution for 140 days only. For other researched period of sulphate exposure, mechanical strength decreased in comparison with the reference values. On the other hand, HPC C II exhibited mechanical resistivity to sulphate action in all examined time periods of sulphate solution exposure.

Název v anglickém jazyce

Durability of Two Types of HPC at Sulphate Solution Environment

Popis výsledku anglicky

Sulphate attack of concrete and cement composites comprises sulphate ions migration into the material porous space and their following reaction with hydration products in the presence of water. Newly formed compounds initiate filling of porous space and volume expansion. Sulphate corrosion phenomenon still belongs to the main mechanism affecting the durability and service life of concrete structures. This paper deals with the investigation of sulphate resistance of two types of High Performance Concrete (HPC) exposed for 168 days to sodium sulphate water solution and reference environment of distilled water. Corrosive action is monitored at chosen time periods nondestructively, i.e. using measurement of length and mass changes, basic physical characteristics and dynamic moduli. Additionally, destructive tests of mechanical parameters are realised. For samples immersed in distilled water, improvement in mechanical strength is observed for the both studied HPCs. In case of HPC C I containing crushed aggregate, the improvement of mechanical resistivity is observed for samples exposed to sulphate solution for 140 days only. For other researched period of sulphate exposure, mechanical strength decreased in comparison with the reference values. On the other hand, HPC C II exhibited mechanical resistivity to sulphate action in all examined time periods of sulphate solution exposure.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</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

Special Concrete and Composites 2016

ISBN

978-3-0357-1079-3

ISSN

1013-9826

e-ISSN

1662-9795

Počet stran výsledku

6

Strana od-do

66-71

Název nakladatele

Trans Tech Publications

Místo vydání

Curich

Místo konání akce

Bystřice nad Pernštejnem, Lísek

Datum konání akce

13. 10. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—