Probing the microstructure and water phases in composite cement blends
- Immobilisation Science Laboratory, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD (United Kingdom)
{sup 1}H nuclear magnetic resonance relaxometry has been used in combination with the more conventional techniques of mercury intrusion porosimetry, freeze-drying and thermogravimetric analysis to investigate the evolution of the microstructure and the distribution of water phases in two composite cement blends hydrating over a one year period. These two blends are composed of high substitution of Ordinary Portland Cement (OPC) with Blast Furnace Slag (BFS) at level of 75 wt.% (3:1 blend) and 90 wt.% (9:1 blend). After one year, the 3:1 blend microstructure is characterised by poorly interconnected gel pores filled with about 35 vol.% of water while less than 4 vol.% of water is trapped in remaining capillary pores. The 9:1 blend microstructure is characterised by a network of larger gel and capillary pores filled with about 21 and 22 vol.% of water respectively. Further hydration is ruled out for this blend.
- OSTI ID:
- 20995367
- Journal Information:
- Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 3 Vol. 37; ISSN 0008-8846; ISSN CCNRAI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sorption of radionuclides onto cement materials altered by hydrothermal reaction