期刊
CEMENT & CONCRETE COMPOSITES
卷 43, 期 -, 页码 12-19出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2013.06.004
关键词
Super-critical carbonation; Mechanical processing; Lime; Cement; Flexural testing; Petrography
资金
- Engineering and Physical Sciences Research Council [GR/T01518/01] Funding Source: researchfish
This work combined compression moulding with subsequent super-critical carbonation treatment (100 bar, 60 degrees C, 24 h) to fabricate cement and/or lime based ceramic composites with various aggregates. Composites were examined using mechanical testing, XRD. He pycnometry and thin-section petrography. Composites with lime-only binders were significantly weaker than those with cement-lime binders regardless of the degree of carbonation. Flexural strengths in excess of >10 MPa were routinely achieved in large (>100 mm) specimens. Aggregate type (calcareous vs. siliceous) had a significant effect on the microstructure and properties of the composites. Calcareous aggregates appear to augment the strength enhancement effected during super-critical carbonation by encouraging preferential precipitation of calcite at the binder-aggregate interface. (C) 2013 Elsevier Ltd. All rights reserved.
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