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Treatments for the Improvement of Recycled Aggregate
Abstract
The microstructure of recycled aggregate prepared from the crushing of old concrete was studied. It was found that the recycled aggregate is covered with loose particles that may prevent good bonding between the new cement matrix and the recycled aggregate. The old cement paste that remained on the natural aggregate was porous and cracked, leading to weak mechanical properties of the recycled aggregate. Treatment of the recycled aggregate by impregnation of silica fume solution and by ultrasonic cleaning was studied with the objective of overcoming the above-mentioned limitations. An increase of ∼30 and ∼15% in the compressive strength at ages 7 and 28days was observed after the silica fume treatment. Ultrasonic treatment led to an improvement of ∼7%.
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Cited by
Performance enhancement of recycled concrete aggregate – A review
Shi, C., Li, Y., Zhang, J., Li, W., Chong, L., & Xie, Z. (2016) · Journal of Cleaner Production · doi:10.1016/j.jclepro.2015.08.057 · Cited by 1,157
Xuan, D., Zhan, B., & Poon, C. S. (2016) · Cement and Concrete Composites · doi:10.1016/j.cemconcomp.2015.10.018 · Cited by 620
Experimental study on CO2 curing for enhancement of recycled aggregate properties
Zhan, B., Poon, C. S., Liu, Q., Kou, S., & Shi, C. (2014) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2013.09.008 · Cited by 406
Performance Enhancement of Recycled Concrete Aggregates through Carbonation
Zhang, J., Shi, C., Li, Y., Pan, X., Poon, C.-S., & Xie, Z. (2015) · Journal of Materials in Civil Engineering · doi:10.1061/(asce)mt.1943-5533.0001296 · Cited by 398
Influence of carbonated recycled concrete aggregate on properties of cement mortar
Zhang, J., Shi, C., Li, Y., Pan, X., Poon, C.-S., & Xie, Z. (2015) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2015.08.087 · Cited by 358
Metadata
- Authors
- Katz, A.
- Venue
- Journal of Materials in Civil Engineering
- Published
- 2004-12
- Volume
- 16
- Issue
- 6
- Pages
- 597-603
- ISSN
- 0899-1561 (ISSN-L)
- 1943-5533
- DOI
- 10.1061/(asce)0899-1561(2004)16:6(597
- OpenAlex
- W2012299702
- Cited by
- 546
- References
- 0
- FWCI
- 2.84
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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