Characterising and modelling the chloride resistance of blended-cement concrete by considering the effect of supplementary elements from glass

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15059
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 22010:Civil engineering material, execution and construction management-related
• Research Institution: The University of Tokyo
• Principal Investigator: Wang Tiao 東京大学, 大学院工学系研究科(工学部), 特任助教 (70822386)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: SCMs / Chloride / Aluminosilicate glass / Probability analyses

Outline of Final Research Achievements

This research studied the dissolution rate of SCMs through synthetized aluminosilicate glass. The dissolution rate of aluminosilicate glass depends on its chemical composition and quasi-crystalline nanodomains of glass phases. The chloride resistance of blended cement paste depends on the microstructure and the electrostatic interaction between the chloride ions in the pore solution and the chemical bound chloride. A probability model was finally proposed, which considers the coupled effect of loading action, chloride ingression, crack development and corrosion initiation and progression. The analyses results show that SCMs could improve the durability of concrete structures. This probability model provides a powerful tool for civil engineer to design concrete structure under marine environment.

Free Research Field

Civil Engineering

Academic Significance and Societal Importance of the Research Achievements

Utilization of SCMs is one of the most promising to improve durability of concrete structures. This research studies the reactivity of SCMs and chloride resistance of SCMs blended cement paste. A probability model for assessing corrosion failure of concrete structures was developed for engineers.