Awoyera, P. O. and Okoro, U. C. (2018) Filler-Ability of Highly Active Metakaolin for Improving Morphology and Strength Characteristics of Recycled Aggregate Concrete. Silicon. pp. 1-8. ISSN 1876-990X (In Press)
Full text not available from this repository.Abstract
The use of recycled aggregate as a partial or total replacement of the conventional aggregate for construction is a promising approach to ensuring sustainability in the built environment. Except for the need of improving its quality, recycled aggregate has become a reliable solution to the depleting over explored natural sources. This study focused on the use of highly active metakaolin as a filler in recycled aggregate concrete, with the hope of enhancing both its morphology and strength properties. Recycled concrete aggregate (RCA), resulting from crushed concrete rubbles, was used as a partial replacement for natural aggregate at 20%, 30% and 50%. While 1 kg of metakaolin was added as a filler in each recycled aggregate mix. The workability (slump values) of the fresh concrete mixtures was determined, and the mechanical properties - compressive and split-tensile strengths of the hardened concrete mixtures were evaluated. The study also explored the morphology and mineralogy of selected concrete samples using Scanning Electron Microscopy (SEM) and X-ray diffractometer (XRD), respectively. The addition of metakaolin to recycled aggregate concrete reduced its workability, but it improved the morphology and strength characteristics of the concrete. A mixture prepared with 20% recycled aggregate gave higher strength among the recycled mixtures. Recycled aggregate concrete, as described in this study can be applied to the production of structural members in the field.
| Item Type: | Article |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Dr. Paul Awoyera |
| Date Deposited: | 26 Nov 2018 15:10 |
| Last Modified: | 26 Nov 2018 15:10 |
| URI: | http://eprints.covenantuniversity.edu.ng/id/eprint/12154 |
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