Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate
This paper presents an experimental investigation on the effect of the replacement of natural coarse aggregate (NCA) with either recycled concrete aggregate (RCA) or recycled clay brick aggregate (RBA) on the compressive strengths of the hardened concrete. Two grades (C25 and C50) of concrete were i...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-06-01
|
| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379718308283 |
| _version_ | 1818953830778273792 |
|---|---|
| author | Chaocan Zheng Cong Lou Geng Du Xiaozhen Li Zhiwu Liu Liqin Li |
| author_facet | Chaocan Zheng Cong Lou Geng Du Xiaozhen Li Zhiwu Liu Liqin Li |
| author_sort | Chaocan Zheng |
| collection | DOAJ |
| description | This paper presents an experimental investigation on the effect of the replacement of natural coarse aggregate (NCA) with either recycled concrete aggregate (RCA) or recycled clay brick aggregate (RBA) on the compressive strengths of the hardened concrete. Two grades (C25 and C50) of concrete were investigated, which were achieved by using different water-to-cement ratios. In each grade concrete five different replacement rates, 0%, 25%, 50%, 75% and 100% were considered. In order to improve the performance of the recycled aggregates in the concrete mixes, the RCA and RBA were carefully sieved by using the optimal degradation. In this way the largest reduction in the 28-day compressive strength was found to be only 7.2% and 9.6% for C25 and C50 recycled concrete when the NCA was replaced 100% by RCA, and 11% and 13% for C25 and C50 recycled concrete when the NCA was replaced 100% by RBA. In general, the concrete with RCA has better performance than the concrete with RBA. The comparison of the present experimental results with those reported in literature for hardened concrete with either RCA or RBA demonstrates the effectiveness in improving the compressive strength by using the optimal gradation of recycled aggregates. Keywords: Recycled aggregate concrete, Waste concrete aggregate, Clay brick aggregate, Mechanical properties, Experiments |
| first_indexed | 2024-12-20T10:12:31Z |
| format | Article |
| id | doaj.art-a92c628e6313477084399166a6b4c22d |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-20T10:12:31Z |
| publishDate | 2018-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-a92c628e6313477084399166a6b4c22d2022-12-21T19:44:06ZengElsevierResults in Physics2211-37972018-06-01913171322Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregateChaocan Zheng0Cong Lou1Geng Du2Xiaozhen Li3Zhiwu Liu4Liqin Li5Corresponding author at: Jinhua Polytechnic, Architectural Engineering Institute, 888 Haitang West Road, Jinhua, Zhejiang Province, China.; College of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaCollege of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaCollege of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaCollege of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaCollege of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaCollege of Civil Engineering and Architecture, Jinhua Polytechnic, Jinhua 321017, Zhejiang Province, PR ChinaThis paper presents an experimental investigation on the effect of the replacement of natural coarse aggregate (NCA) with either recycled concrete aggregate (RCA) or recycled clay brick aggregate (RBA) on the compressive strengths of the hardened concrete. Two grades (C25 and C50) of concrete were investigated, which were achieved by using different water-to-cement ratios. In each grade concrete five different replacement rates, 0%, 25%, 50%, 75% and 100% were considered. In order to improve the performance of the recycled aggregates in the concrete mixes, the RCA and RBA were carefully sieved by using the optimal degradation. In this way the largest reduction in the 28-day compressive strength was found to be only 7.2% and 9.6% for C25 and C50 recycled concrete when the NCA was replaced 100% by RCA, and 11% and 13% for C25 and C50 recycled concrete when the NCA was replaced 100% by RBA. In general, the concrete with RCA has better performance than the concrete with RBA. The comparison of the present experimental results with those reported in literature for hardened concrete with either RCA or RBA demonstrates the effectiveness in improving the compressive strength by using the optimal gradation of recycled aggregates. Keywords: Recycled aggregate concrete, Waste concrete aggregate, Clay brick aggregate, Mechanical properties, Experimentshttp://www.sciencedirect.com/science/article/pii/S2211379718308283 |
| spellingShingle | Chaocan Zheng Cong Lou Geng Du Xiaozhen Li Zhiwu Liu Liqin Li Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate Results in Physics |
| title | Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| title_full | Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| title_fullStr | Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| title_full_unstemmed | Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| title_short | Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| title_sort | mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate |
| url | http://www.sciencedirect.com/science/article/pii/S2211379718308283 |
| work_keys_str_mv | AT chaocanzheng mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate AT conglou mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate AT gengdu mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate AT xiaozhenli mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate AT zhiwuliu mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate AT liqinli mechanicalpropertiesofrecycledconcretewithdemolishedwasteconcreteaggregateandclaybrickaggregate |