Chemical Modifications of Recycled Concrete Aggregate
Article Sidebar
Main Article Content
Abstract
The necessity for environmental sustainability has prompted the utilization of recycled concrete aggregates (RCA) sourced from structural demolition sites for the production of recycled aggregate concrete (RAC). The primary element impacting the quality of recycled concrete aggregate (RCA) is the mortar paste that adheres to the natural aggregate (NA). The cement mortar adhered to recycled concrete aggregate exhibits higher porosity and water absorption levels, along with reduced strength compared to natural aggregate. These characteristics negatively impact both the mechanical properties and durability of fresh and hardened concrete incorporating recycled concrete aggregate. As a result, it is crucial to enhance the interface by improving the surface of the aggregate or by removing the mortar adhered to the NA. Methods for achieving this include surface modification of the aggregate or removing adhered paste from the natural aggregate (NA). This research includes treatment involving acidic solutions particularly hydrochloric acid (HCl), and sulphuric acid (H2SO4), for mortar layer removal from RCA, analyzing their impact on the mechanical properties of aggregates and durability of concrete incorporating RCA.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
How to Cite
References
A. J. Tang, R. De Jesus, and A. Cunanan, “Microstructure And Mechanical Properties Of Concrete With Treated Recycled Concrete Aggregates,” Geomate Journal, vol. 16, no. 57, pp. 21–27, 2019, doi: 10.21660/2019.57.4537. https://doi.org/10.21660/2019.57.4537
Y. Kim, A. Hanif, S. M. S. Kazmi, M. J. Munir, and C. Park, “Properties enhancement of recycled aggregate concrete through pretreatment of coarse aggregates – Comparative assessment of assorted techniques,” J Clean Prod, vol. 191, pp. 339–349, Aug. 2018, doi: 10.1016/J.JCLEPRO.2018.04.192. https://doi.org/10.1016/j.jclepro.2018.04.192
L. Wang, J. Wang, X. Qian, P. Chen, Y. Xu, and J. Guo, “An environmentally friendly method to improve the quality of recycled concrete aggregates,” Constr Build Mater, vol. 144, pp. 432–441, Jul. 2017, doi: 10.1016/J.CONBUILDMAT.2017.03.191. https://doi.org/10.1016/j.conbuildmat.2017.03.191
P. Saravanakumar, K. Abhiram, and B. Manoj, “Properties of treated recycled aggregates and its influence on concrete strength characteristics,” Constr Build Mater, vol. 111, pp. 611–617, May 2016, doi: 10.1016/J.CONBUILDMAT.2016.02.064. https://doi.org/10.1016/j.conbuildmat.2016.02.064
H. K. A. Al-Bayati, P. K. Das, S. L. Tighe, and H. Baaj, “Evaluation of various treatment methods for enhancing the physical and morphological properties of coarse recycled concrete aggregate,” Constr Build Mater, vol. 112, pp. 284–298, Jun. 2016, doi: 10.1016/J.CONBUILDMAT.2016.02.176. https://doi.org/10.1016/j.conbuildmat.2016.02.176
K. Pandurangan, A. Dayanithy, and S. Om Prakash, “Influence of treatment methods on the bond strength of recycled aggregate concrete,” Constr Build Mater, vol. 120, pp. 212–221, Sep. 2016, doi: 10.1016/J.CONBUILDMAT.2016.05.093. https://doi.org/10.1016/j.conbuildmat.2016.05.093
R. Purushothaman, R. R. Amirthavalli, and L. Karan, “Influence of Treatment Methods on the Strength and Performance Characteristics of Recycled Aggregate Concrete,” Journal of Materials in Civil Engineering, vol. 27, no. 5, p. 04014168, Aug. 2014, doi: 10.1061/(ASCE)MT.1943-5533.0001128. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001128
S. Ismail and M. Ramli, “Engineering properties of treated recycled concrete aggregate (RCA) for structural applications,” Constr Build Mater, vol. 44, pp. 464–476, Jul. 2013, doi: 10.1016/J.CONBUILDMAT.2013.03.014. https://doi.org/10.1016/j.conbuildmat.2013.03.014
V. W. Y. Tam, C. M. Tam, and K. N. Le, “Removal of cement mortar remains from recycled aggregate using pre-soaking approaches,” Resour Conserv Recycl, vol. 50, no. 1, pp. 82–101, Mar. 2007, doi: 10.1016/J.RESCONREC.2006.05.012. https://doi.org/10.1016/j.resconrec.2006.05.012
Ramesh, G. (2021). Green Concrete: Environment Friendly Solution. In Indian Journal of Design Engineering (Vol. 1, Issue 2, pp. 13–20). https://doi.org/10.54105/ijde.b8007.081221
Yergol, Mr. R., & Shastri, Dr. L. (2021). Strength Characteristic of Recycled Aggregate with Silica Fume as Admixture. In International Journal of Innovative Technology and Exploring Engineering (Vol. 10, Issue 4, pp. 243–246). https://doi.org/10.35940/ijitee.d8549.0210421
Manasa, S., Bhaskar, M. U., & Kumar, G. N. (2019). Performance of Recycled Aggregate Concrete for M25 Grade Concrete. In International Journal of Engineering and Advanced Technology (Vol. 9, Issue 2, pp. 4694–4700). https://doi.org/10.35940/ijeat.b5130.129219
Siva, M., & Vianneys, J. (2019). Development of Modified Recycled Aggregate for the Production of Sustainable Concrete. In International Journal of Recent Technology and Engineering (IJRTE) (Vol. 8, Issue 3, pp. 8614–8618). https://doi.org/10.35940/ijrte.c6446.098319
Ibrahim, W., & Zamrawi, A. (2021). Fire Behavior of RC Flat Slabs Containing Recycled Ceramic Aggregate. In International Journal of Advanced Engineering and Nano Technology (Vol. 4, Issue 2, pp. 1–5). https://doi.org/10.35940/ijaent.b0425.024220