Pregled bibliografske jedinice broj: 1249513
Microstructure as a key parameter for understanding chloride ingress in alkali-activated mortars
Microstructure as a key parameter for understanding chloride ingress in alkali-activated mortars // Cement & concrete composites, 134 (2022), 104818, 16 doi:10.1016/j.cemconcomp.2022.104818 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1249513 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Microstructure as a key parameter for understanding
chloride ingress in alkali-activated mortars
Autori
Runci, Antonino ; Provis, John, L. ; Serdar, Marijana
Izvornik
Cement & concrete composites (0958-9465) 134
(2022);
104818, 16
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Alkali-activated materials ; Chloride diffusion ; Chloride migration ; Microstructure ; Porosity ; Chloride binding capacity
Sažetak
This study aims to evaluate the influence of microstructural properties on the chloride diffusion resistance of alkali-activated materials (AAMs) based on blast furnace slag and/or fly ash, with variable activator doses (represented as Na2O%). Resistance to chloride penetration was tested using accelerated chloride penetration (NT BUILD 443) and chloride migration (NT BUILD 492) tests. Addition of slag to alkali-activated mortars mainly based on fly ash reduced porosity and chloride permeability. Chloride penetration decreased with increasing Na2O%, but porosity and pore structure did not follow the same trend. The pore threshold (dth) and critical pore radius (rcrit) determined by mercury intrusion porosimetry had a good correlation with the chloride diffusion coefficient. Both the quantification of reaction products and the correlation between chloride penetration and pore surface area indicated that physical chloride adsorption on the C-A-S-H/N-A-S-H gel surfaces predominated over chemical chloride binding.
Izvorni jezik
Engleski
Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti
POVEZANOST RADA
Projekti:
--UIP-2017-05-4767 - Alternativna veziva za beton: razumijevanje mikrostrukture za predviđanje trajnosti (ABC) (Serdar, Marijana) ( CroRIS)
--813596 - PhD Training Network on Durable, Reliable and Sustainable Structures with Alkali-Activated Materials (DuRSAAM) (Serdar, Marijana) ( CroRIS)
Ustanove:
Građevinski fakultet, Zagreb
