Pore size distribution, strength, and microstructure of portland cement paste containing metal hydroxide waste
Conference
·
OSTI ID:567698
Stabilization/solidification of hazardous wastes is used to convert hazardous metal hydroxide waste sludge into a solid mass with better handling properties. This study investigated the pore size development of ordinary portland cement pastes containing metal hydroxide waste sludge and rice husk ash using mercury intrusion porosimetry. The effects of acre and the addition of rice husk ash on pore size development and strength were studied. It was found that the pore structures of mixes changed significantly with curing acre. The pore size shifted from 1,204 to 324 {angstrom} for 3-day old cement paste, and from 956 to 263 {angstrom} for a 7-day old sample. A reduction in pore size distribution for different curing ages was also observed in the other mixtures. From this limited study, no conclusion could be made as to any correlation between strength development and porosity. 10 refs., 6 figs., 3 tabs.
- Research Organization:
- Argonne National Lab., IL (United States)
- OSTI ID:
- 567698
- Report Number(s):
- CONF-9611157--; ON: DE97009015
- Country of Publication:
- United States
- Language:
- English
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