Impact of leaching on chloride ingress profiles in concrete

Alisa Machner (Avtor), Marie Helene Bjørndal (Avtor), Aljoša Šajna (Avtor), Nikola Mikanovic (Avtor), Klaartje De Weerdt (Avtor)

Povzetek

To investigate the effect of leaching on chloride ingress profiles in concrete and mortar, we exposed concrete and mortar specimens for 90 and 180 days to two different exposure solutions: 3% NaCl, and 3% NaCl with KOH added to limit leaching. The solutions were replaced weekly. After exposure, we determined total chloride profiles to investigate the chloride ingress, and portlandite profiles to assess the extent of leaching. The results showed that leaching during exposure greatly affects the chloride ingress profiles in mortar and concrete. We found that leaching leads to considerably higher maximum total chloride content and deeper chloride penetration into the concrete than in the specimens where leaching was limited. We recommend therefore that leaching should be taken into account in standard laboratory testing and that more mechanistic service life models should be used to take into account the impact of leaching.

Ključne besede

prodor kloridov;napoved življenjske dobe;izcejanje;beton;portland;odprti dostop;chloride ingress;service life prediction;leaching;concrete;portlandite;open access;

Podatki

Jezik:	Angleški jezik
Leto izida:	2022
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	ZAG - Zavod za gradbeništvo Slovenije
Založnik:	Springer Netherlands
UDK:	620.1/.2
COBISS:	140192515
ISSN:	1871-6873
Št. ogledov:	5
Št. prenosov:	2
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	prodor kloridov;napoved življenjske dobe;izcejanje;beton;portland;odprti dostop;
Komentar vira:	Nasl. z nasl. zaslona; Opis vira z dne: 31. 1. 2023;
Strani:	str. 1-18
Letnik:	ǂVol. ǂ55
Zvezek:	ǂiss. ǂ1, article no. 8
Čas izdaje:	Jan. 2022
DOI:	10.1617/s11527-021-01730-w
ID:	18799046