Hybrid Environmentally Friendly Method for RCA Concrete Quality Improvement
Source abstract
Abstract
Abstract Research on concrete recycling has led to the discovery of many processes for recycled concrete aggregate (RCA) treatment, each with its pros and cons on quality improvement, resource requirements, or scalability. This study aimed to propose a technique that combines two methods (mechanical grinding and acidic soaking) for mortar removal and improves the quality of RCA so as to realize a zero-waste, highly efficient, few-hours-long single-step process which we call acid milling. A quantitative comparison of aggregate and final concrete quality has been performed between each separate method. The proposed method shows about 57% relative improvement of aggregate quality for water absorption and density, while the concrete experiment shows up to 10% relative improvement for the compressive and flexural strengths compared with the untreated RCA concrete. This study paves the way for an efficient and sustainable concrete recycling process to be applied on a large scale.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Concrete Corrosion and Durability · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Ajdukiewicz, A. B., Kliszczewicz, A. T., Tsujino, M., Noguchi, T., Masaki, T., Kanematsu, M., et al. (2012). Improving the quality of recycled fine aggregate by selective removal of brittle defects. Journal of Advanced Concrete Technology, 10(12), 395–410. https://doi.org/10.3151/JACT.10.39510.3151/JACT.10.395 ↗
2. Arunakanthi, E., Rao, H. S., & Reddy, I. V. R. (2012). Effects of hydrochloric acid in mixing and curing water on strength of high-performance metakaolin concrete. International Journal of Applied Engineering and Technology, 2(2), 68–76.
3. Belén, G. F., Fernando, M. A., Diego, C. L., & Sindy, S. P. (2011). Stress–strain relationship in axial compression for concrete using recycled saturated coarse aggregate. Construction and Building Materials, 25(5), 2335–2342. https://doi.org/10.1016/J.CONBUILDMAT.2010.11.03110.1016/J.CONBUILDMAT.2010.11.031 ↗
4. Bui, N. K., Satomi, T., & Takahashi, H. (2018a). Mechanical properties of concrete containing 100% treated coarse recycled concrete aggregate. Construction and Building Materials, 163, 496–507. https://doi.org/10.1016/j.conbuildmat.2017.12.13110.1016/j.conbuildmat.2017.12.131 ↗
5. Bui, N. K., Satomi, T., & Takahashi, H. (2018b). Enhancement of recycled aggregate concrete properties by a new treatment method. International Journal of GEOMATE, 14(41), 68–76. https://doi.org/10.2166/2018.41.1148410.2166/2018.41.11484 ↗
6. Bui, N. K., Satomi, T., & Takahashi, H. (2019). Influence of industrial by-products and waste paper sludge ash on properties of recycled aggregate concrete. Journal of Cleaner Production, 214, 403–418. https://doi.org/10.1016/j.jclepro.2018.12.32510.1016/j.jclepro.2018.12.325 ↗
7. Çomak, B. (2016). Effects of use of alkaline mixing waters on engineering properties of cement mortars. European Journal of Environmental and Civil Engineering. https://doi.org/10.1080/19648189.2016.1217794,22(6),736-75410.1080/19648189.2016.1217794,22(6),736-754 ↗
8. Dhir RK, Newlands MD, Halliday JE. (2003). Field application and advantage of concrete recycled in-situ recycling systems, 845. https://doi.org/10.1680/RAROWM.32521.004510.1680/RAROWM.32521.0045 ↗
9. Kim, Y., Hanif, A., Kazmi, S. M. S., Munir, M. J., & Park, C. (2018). Properties enhancement of recycled aggregate concrete through pretreatment of coarse aggregates—comparative assessment of assorted techniques. Journal of Cleaner Production, 191, 339–349. https://doi.org/10.1016/J.JCLEPRO.2018.04.19210.1016/J.JCLEPRO.2018.04.192 ↗
10. Lee, C.-H., Du, J.-C., & Shen, D.-H. (2012). Evaluation of pre-coated recycled concrete aggregate for hot mix asphalt. Construction and Building Materials, 28(1), 66–71. https://doi.org/10.1016/j.conbuildmat.2011.08.02510.1016/j.conbuildmat.2011.08.025 ↗
11. Pan, G., Zhan, M., Fu, M., Wang, Y., & Lu, X. (2017). Effect of CO2 curing on demolition recycled fine aggregates enhanced by calcium hydroxide pre-soaking. Construction and Building Materials, 154, 810–818. https://doi.org/10.1016/j.conbuildmat.2017.07.07910.1016/j.conbuildmat.2017.07.079 ↗
12. Quattrone, M., Angulo, S. C., & John, V. M. (2014). Energy and CO2 from high performance recycled aggregate production. Resources, Conservation and Recycling, 90, 21–33. https://doi.org/10.1016/j.resconrec.2014.06.00310.1016/j.resconrec.2014.06.003 ↗
13. Rahal, K. (2007). Mechanical properties of concrete with recycled coarse aggregate. Building and Environment, 42(1), 407–415. https://doi.org/10.1016/j.buildenv.2005.07.03310.1016/j.buildenv.2005.07.033 ↗
14. Shaban, W. M., Yang, J., Su, H., Mo, K. H., Li, L., & Xie, J. (2019). Quality improvement techniques for recycled concrete aggregate: a review. Journal of Advanced Concrete Technology, 17(4), 151–167. https://doi.org/10.3151/JACT.17.15110.3151/JACT.17.151 ↗
15. Smith JT, Tighe SL, Norris J, Kim E, Xu X. (2008). Coarse recycled aggregate concrete pavements - Design, instrumentation, and performance. TAC/ATC 2008–2008 Annual Conference and Exhibition of the Transportation Association of Canada: Transportation - A Key to a Sustainable Future. Accessed 24 September 2022
16. Tam, V. W. Y., Tam, C. M., & Le, K. N. (2007). Removal of cement mortar remains from recycled aggregate using pre-soaking approaches. Resources, Conservation and Recycling, 50(1), 82–101. https://doi.org/10.1016/j.resconrec.2006.05.01210.1016/j.resconrec.2006.05.012 ↗
17. Tavakoli, M., & Soroushian, P. (1996). Strengths of recycled aggregate concrete made using field-demolished concrete as aggregate. ACI Materials Journal. https://doi.org/10.1435/980210.1435/9802 ↗
18. Tripura, D. D., Raj, S., Mohammad, S., & Das, R. (2018). Suitability of recycled aggregate as a replacement for natural aggregate in construction. Special Publication, 326(326), 37–39. https://doi.org/10.1435/5171101910.1435/51711019 ↗
19. Tsujino, M., Noguchi, T., Tamura, M., Kanematsu, M., & Maruyama, I. (2007). Application of conventionally recycled coarse aggregate to concrete structure by surface modification treatment. Journal of Advanced Concrete Technology, 5(1), 13–25. https://doi.org/10.3151/jact.5.1310.3151/jact.5.13 ↗
20. Utepov, Y., Tulebekova, A., Aldungarova, A., Mkilima, T., Zharassov, S., Shakhmov, Z., et al. (2022). Investigating the influence of initial water pH on concrete strength gain using a sensors and sclerometric test combination. Infrastructures, 7(12), 159. https://doi.org/10.3390/INFRASTRUCTURES712015910.3390/INFRASTRUCTURES7120159 ↗
21. Verma, A., Babu, V. S., & Arunachalam, S. (2022). Characterization of recycled aggregate by the combined method: acid soaking and mechanical grinding technique. Materials Today: Proceedings, 49, 230–238. https://doi.org/10.1016/J.MATPR.2021.01.84210.1016/J.MATPR.2021.01.842 ↗
22. Wang, L., Wang, J., Qian, X., Chen, P., Xu, Y., & Guo, J. (2017). An environmentally friendly method to improve the quality of recycled concrete aggregates. Construction and Building Materials, 144, 432–441. https://doi.org/10.1016/j.conbuildmat.2017.03.19110.1016/j.conbuildmat.2017.03.191 ↗
23. Xuan, D., Zhan, B., & Poon, C. S. (2016). Assessment of mechanical properties of concrete incorporating carbonated recycled concrete aggregates. Cement and Concrete Composites, 65, 67–74. https://doi.org/10.1016/j.cemconcomp.2015.10.01810.1016/j.cemconcomp.2015.10.018 ↗
24. Zajac, M., Wieczorek, M., Lothenbach, B., Bullerjahn, F., Schmidt, V. M., & Ben Haha, M. (2022). Effect of alkali and sulfate on early hydration of Portland cements at high water to cement ratio. Construction and Building Materials, 345, 128283. https://doi.org/10.1016/J.CONBUILDMAT.2022.12828310.1016/J.CONBUILDMAT.2022.128283 ↗
25. Zhou, C., & Chen, Z. (2017). Mechanical properties of recycled concrete made with different types of coarse aggregate. Construction and Building Materials, 134, 497–506. https://doi.org/10.1016/j.conbuildmat.2016.12.16310.1016/j.conbuildmat.2016.12.163 ↗