Assessing alkali-activated concrete performance in chloride environments using NT Build 492

Publication Type:
Journal Article
Materials and Structures/Materiaux et Constructions, 2021, 54, (2)
Issue Date:
Filename Description Size
Noushini2021_Article_AssessingAlkali-activatedConcr.pdfPublished version2.25 MB
Adobe PDF
Full metadata record
The production of Portland cement is responsible for approximately 5–7% of the worldwide CO2 emission. Geopolymer concrete (GPC) presents potential to become a more sustainable alternative to Portland cement and reduce the environment impact of the concrete industry. Marine environment is one of the most corrosion issues for reinforced concrete structures. Chloride migration test (Nordtest NT Build 492) and bulk diffusion chloride test (ASTM C1556) has been widely used to assess chloride diffusion resistance of Portland cement concrete. NT Build 492, involving externally applied electrical voltage, provides fast and adequate assessment of chloride penetration resistance of Portland cement concrete. However, the utilization of NT Build 492 for GPCs requires recalibration due to their different microstructure and pore solution composition compared to Portland cement concrete. This study aims to establish performance-based criteria for GPCs in marine environments using NT Build 492 and ASTM C1556 test protocols. Experimental results revealed a good correlation between chloride migration coefficients (NT Build 492) and chloride diffusion coefficients (ASTM C1556). In addition, chloride concentration at the colour change boundary used to calculate the chloride migration coefficients in NT Build 492 has been recalibrated for the chemistry of GPCs pore solution.
Please use this identifier to cite or link to this item: