2017 Fiscal Year Final Research Report
Surface chemistry of calcium aluminosilicate hydrate (C-A-S-H) for ions immobilization and transport in low carbon cementitious materials
| Project/Area Number |
16K18129
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Keywords | Cement chemistry / Surface chemistry / Ionic adsorption / Diffusion / C-A-S-H |
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| Outline of Final Research Achievements |
Alumina-rich supplementary cementitious materials produces aluminium incorporated calcium silicate hydrate, C-A-S-H. The electrostatic properties of the C-A-S-H gel are significantly different from the conventional C-S-H, which may affect the durability performance. This research project focuses on the surface electrical properties mainly surface charge of C-S-H and C-A-S-H. A methodology was proposed to determine the properties from the experimental data and fitting the data to a surface complexation model. Subsequently, the model was verified with experimental data focused on chloride adsorption considering corrosion of reinforcement in concrete. The developed model were coupled with the hydration and reactive transport models to predict the ionic ingress in cementitious materials. The model was verified with experimental data for chloride ingress in slag-blended cementitious materials. The methodology will be applied to C-A-S-H to understand the its structure and the properties.
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| Free Research Field |
工学
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