Experimental Investigation on Durability Performance of Recycled Aggregate Concrete with Mineral Admixtures

Kashini S; Brindha D

Kashini S Research Scholar, Department of Civil Engineering, Thiagarajar College of Engineering Madurai.
Brindha D Professor, Department of Civil Engineering, Thiagarajar College of Engineering Madurai.

Abstract

The adhesion of cement mortar and the negative influence of the previous interfacial transition zone (ITZ) on reinforced RAC were the main contributors to the durability of reinforcement. For various replacement amounts of recycled concrete aggregate (RCA), the influence of the inclusion of a mineral additive on the durability performance of RAC was investigated. 25% of ground granulated blast furnace slag (GGBS) and 10% of silica fume (SF) have been used as mineral admixtures. In this work, an experimental investigation was conducted to determine the effects of SF and GGBS combination on RAC with 0%, 25%, 50%, 75%, and 100% RCA. Durability characteristics, water absorption, sorptivity, sulphate attack, acid attack, and thermal resistance were taken. The homogeneity of RAC was also examined using an ultrasonic pulse velocity (UPV) test. The strength is gradually increased by the addition of GGBS, which forms a secondary C-S-H gel and has a lower heat of hydration. The mineral admixture lowers the amount of calcium hydroxide and delays the development of ettringite. Therefore, the addition of a mineral

References

1. “Miller SD, Vanderlugt CL, Begolka WS, Pao W, Yauch RL, Neville KL, Katz-Levy Y, Carrizosa A, Kim BS. Persistent infection with Theiler’s virus leads to CNS autoimmunity via epitope spreading. Nature medicine. 1997 Oct 1;3(10):1133-6.”.
2. K. Y. Ann, H. Y. Moon, Y. B. Kim, and J. Ryou, “Durability of recycled aggregate concrete using pozzolanic materials,” Waste Management, vol. 28, no. 6, pp. 993–999, 2008, doi: 10.1016/j.wasman.2007.03.003.
3. S. C. Kou, C. S. Poon, and F. Agrela, “Comparisons of natural and recycled aggregate concretes prepared with the addition of different mineral admixtures,” Cem Concr Compos, vol. 33, no. 8, pp. 788–795, Sep.
2011, doi: 10.1016/j.cemconcomp.2011.05.009.
4. L. Qureshi, B. Ali, A. A.-C. and B. Materials, and undefined 2020, “Combined effects of supplementary cementitious materials (silica fume, GGBS, fly ash and rice husk ash) and steel fiber on the hardened properties of recycled,” Elsevier, doi: 10.1016/j. conbuildmat.2020.120.
5. M. Nili and A. Ehsani, “Investigating the effect of the cement paste and transition zone on strength development of concrete containing nanosilica and silica fume,” Mater Des, vol. 75, pp. 174–183, Jun. 2015, doi: 10.1016/j.matdes.2015.03.024.
6. V. B. R. Suda and P. S. Rao, “Experimental investigation on optimum usage of Micro silica and GGBS for the strength characteristics of concrete,” in Materials Today: Proceedings, Elsevier Ltd, Jan. 2020, pp. 805– 811. doi: 10.1016/j.matpr.2019.12.354.
7. V. Corinaldesi and G. Moriconi, “Influence of mineral additions on the performance of 100% recycled aggregate concrete,” Constr Build Mater, vol. 23, no. 8, pp. 2869–2876, Aug. 2009, doi: 10.1016/j. conbuildmat.2009.02.004.
8. B. Yu, Q. Ma, H. chang Huang, and Z. Chen, “Probabilistic prediction model for chloride diffusion coefficient of concrete in terms of material parameters,” Constr Build Mater, vol. 215, pp. 941–957, Aug. 2019, doi: 10.1016/j.conbuildmat.2019.04.147.
9. H. Sasanipour, F. Aslani, and J. Taherinezhad, “Chloride ion permeability improvement of recycled aggregate concrete using pretreated recycled aggregates by silica fume slurry,” Constr Build Mater, vol. 270, Feb. 2021,
doi: 10.1016/j.conbuildmat.2020.121498.