Changes of bond strength properties of hot-dip galvanized plain bars with cementpaste after 1 year of curing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F19%3A00335438" target="_blank" >RIV/68407700:21610/19:00335438 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.conbuildmat.2019.07.147" target="_blank" >https://doi.org/10.1016/j.conbuildmat.2019.07.147</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2019.07.147" target="_blank" >10.1016/j.conbuildmat.2019.07.147</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Changes of bond strength properties of hot-dip galvanized plain bars with cementpaste after 1 year of curing

Popis výsledku v původním jazyce

This paper studies the effect of the corrosion of hot-dip galvanized steel on the porosity development of cement paste at the interfacial transition zone (ITZ) between the two materials. The corrosion of hot-dip galvanized steel by hydrogen evolution was studied during the curing of cement paste samples stored above the water level (AW = 95% RH) and below the water level (BW). The changes in the corrosion process were recorded via the time – open circuit potential evolution (Ecorr/FeCr18Ni9) of stainless steel plate (recounted to Ecorr/SCE) in cement paste bodies. Total monitoring time for the development of both parameters were 6 days, 4 months and 1 year. Further, the bond strength between plain hot-dip galvanized steel and cement by modified pull-out test was verified. Total time of curing was in this case 6 days, 4 months and 1 year. The corrosion reaction between hot-dip galvanized steel and fresh cement produces hydrogen, which significantly increases the capillary porosity of the cement paste at the interfacial transition zone (ITZ). The resulting capillary pores are not effectively filled by the zinc corrosion products and the porous structure is maintained even after one year of curing. Porosity increase of cement consequently results in reduction of bond strength between plain hot-dip galvanized steel and concrete which remains low even for samples cured for very long exposure time.

Název v anglickém jazyce

Changes of bond strength properties of hot-dip galvanized plain bars with cementpaste after 1 year of curing

Popis výsledku anglicky

This paper studies the effect of the corrosion of hot-dip galvanized steel on the porosity development of cement paste at the interfacial transition zone (ITZ) between the two materials. The corrosion of hot-dip galvanized steel by hydrogen evolution was studied during the curing of cement paste samples stored above the water level (AW = 95% RH) and below the water level (BW). The changes in the corrosion process were recorded via the time – open circuit potential evolution (Ecorr/FeCr18Ni9) of stainless steel plate (recounted to Ecorr/SCE) in cement paste bodies. Total monitoring time for the development of both parameters were 6 days, 4 months and 1 year. Further, the bond strength between plain hot-dip galvanized steel and cement by modified pull-out test was verified. Total time of curing was in this case 6 days, 4 months and 1 year. The corrosion reaction between hot-dip galvanized steel and fresh cement produces hydrogen, which significantly increases the capillary porosity of the cement paste at the interfacial transition zone (ITZ). The resulting capillary pores are not effectively filled by the zinc corrosion products and the porous structure is maintained even after one year of curing. Porosity increase of cement consequently results in reduction of bond strength between plain hot-dip galvanized steel and concrete which remains low even for samples cured for very long exposure time.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-22796S" target="_blank" >GA17-22796S: Experimentální a numerická analýza soudržnosti kovové výztuže s ultra vysokohodnotným betonem (UHPC) za vysokých teplot</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Construction and Building Materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

226

Číslo periodika v rámci svazku

listopad

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

920-931

Kód UT WoS článku

000493862600081

EID výsledku v databázi Scopus

2-s2.0-85071837300