Effect of mixing methods of nano silica on properties of recycled aggregate concrete
The effect of presoaking of recycled coarse aggregate (RCA) in nano silica (NS) solution on the properties of recycled aggregates concrete is compared with the direct mixing of NS in concrete. In this study, four series of concrete are considered. The first and second series are control series conta...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
International Federation of Prestressing
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/67406 |
| _version_ | 1848761558197338112 |
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| author | Shaikh, Faiz Chavda, V. Minhaj, N. Arel, H. |
| author_facet | Shaikh, Faiz Chavda, V. Minhaj, N. Arel, H. |
| author_sort | Shaikh, Faiz |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The effect of presoaking of recycled coarse aggregate (RCA) in nano silica (NS) solution on the properties of recycled aggregates concrete is compared with the direct mixing of NS in concrete. In this study, four series of concrete are considered. The first and second series are control series containing 100% natural coarse aggregate (NCA) and 100% RCA, respectively. The third and fourth series are similar to the second series in every aspect except that 2 wt% NS is added through direct mixing in concrete and presoaking of RCA in 2 wt% NS solution of 24 hr, respectively. Results show that the measured 28-day compressive strength of recycled aggregate concrete containing presoaked RCA is higher than that containing direct mixing of NS in concrete. The volume of permeable voids, water sorptivity, and chloride ion penetration measured after 28 days curing is also reduced in recycled aggregate concrete containing presoaked RCA in NS solution than that containing direct mixing of NS in concrete. The total porosity of mortar adjacent to presoaked RCA is also found to be significantly lower than the same, where NS is mixed directly. The concentration of pores in the matrix adjacent to presoaked RCA is also shifted to medium capillary pores from the large capillary pores of matrix adjacent to RCA containing no NS. The volume of medium capillary pores reduced significantly in the matrix adjacent to presoaked RCA compared to the same, where NS is mixed directly. The scanning electron microscopic image analysis also supports this observation. |
| first_indexed | 2025-11-14T10:33:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-67406 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:33:35Z |
| publishDate | 2018 |
| publisher | International Federation of Prestressing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-674062018-12-03T05:35:17Z Effect of mixing methods of nano silica on properties of recycled aggregate concrete Shaikh, Faiz Chavda, V. Minhaj, N. Arel, H. The effect of presoaking of recycled coarse aggregate (RCA) in nano silica (NS) solution on the properties of recycled aggregates concrete is compared with the direct mixing of NS in concrete. In this study, four series of concrete are considered. The first and second series are control series containing 100% natural coarse aggregate (NCA) and 100% RCA, respectively. The third and fourth series are similar to the second series in every aspect except that 2 wt% NS is added through direct mixing in concrete and presoaking of RCA in 2 wt% NS solution of 24 hr, respectively. Results show that the measured 28-day compressive strength of recycled aggregate concrete containing presoaked RCA is higher than that containing direct mixing of NS in concrete. The volume of permeable voids, water sorptivity, and chloride ion penetration measured after 28 days curing is also reduced in recycled aggregate concrete containing presoaked RCA in NS solution than that containing direct mixing of NS in concrete. The total porosity of mortar adjacent to presoaked RCA is also found to be significantly lower than the same, where NS is mixed directly. The concentration of pores in the matrix adjacent to presoaked RCA is also shifted to medium capillary pores from the large capillary pores of matrix adjacent to RCA containing no NS. The volume of medium capillary pores reduced significantly in the matrix adjacent to presoaked RCA compared to the same, where NS is mixed directly. The scanning electron microscopic image analysis also supports this observation. 2018 Journal Article http://hdl.handle.net/20.500.11937/67406 10.1002/suco.201700091 International Federation of Prestressing restricted |
| spellingShingle | Shaikh, Faiz Chavda, V. Minhaj, N. Arel, H. Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title | Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title_full | Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title_fullStr | Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title_full_unstemmed | Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title_short | Effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| title_sort | effect of mixing methods of nano silica on properties of recycled aggregate concrete |
| url | http://hdl.handle.net/20.500.11937/67406 |