Thermal and microstructural studies on mud with additives
Mixtures of mud with various additives were studied to explain the reasons for the change in geotechnical properties. The additives were: lime, cement, fly ash, water-glass containing either Na2CO3 or CaCl2 and phosphogypsum. An increase in strength was usually associated with increase of weight loss, both on static or dynamic heating. An exothermic peak occurred between 420°C and 490°C., being especially high in the presence of water -glass, together with CaCl2. XRD indicated an increase in calcite content and the possible formation of calcium aluminate silicate hydrate. SEM showed a non-homogeneous microstructure and big pores in case of mixtures of low strength (water-glass addition). A homogeneous aggregated structure was obtained in the case of higher strength (fly ash, phosphogypsum).
| Main Authors: | , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
1991
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| Online Access: | http://hdl.handle.net/10261/66076 |
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