Volume 4, Issue 2, December 2020, Page: 33-38
Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan
Eltahir Elshiakh, Construction Engineering Department, Sudan University of Science & Technology, Khartoum, Sudan
Salma Mahmoud, Civil Engineering Department, University of Science & Technology, Omdurman, Sudan
Received: Jul. 17, 2020;       Accepted: Aug. 3, 2020;       Published: Aug. 13, 2020
DOI: 10.11648/j.ajcbm.20200402.11      View  200      Downloads  38
Abstract
Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.
Keywords
Compressive Strength, Pozzolana, Recycled Aggregates, Sudan, Workability
To cite this article
Eltahir Elshiakh, Salma Mahmoud, Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan, American Journal of Construction and Building Materials. Vol. 4, No. 2, 2020, pp. 33-38. doi: 10.11648/j.ajcbm.20200402.11
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Mehta, P. K.. “Sustainable Cements and Concrete for the Climate Change Era – A Review”. Proc. 2nd International Conference on Sustainable Construction Materials and Technologies. Ancona, Italy, June 28-30. (2010).
[2]
McDonough, W. et al. 1992 in Naik & Moriconi. Environmental-friendly durable concrete made with recycled materials for sustainable concrete construction. Hannover, Germany, (2010).
[3]
Salma Mahmoud and Eltahir. Elshiekh, "The Potential Usefulness of Recycled Aggregates and Pozzolana in Producing Green Concrete in Sudan," International Journal of Structural and Civil Engineering Research, Vol. 7, No. 2, pp. 113-117, May 2018. doi: 10.18178/ijscer.7.2.113-117.
[4]
Xiao, J., Fana, L. Y., & Huang, X. An overview of study on recycled aggregate concrete in China (1996–2011). Construction and Building Materials, 31, 364–383. (2012b).
[5]
McNeil, K., & Kang, T. H.-K. Recycled concrete aggregates: A review. International Journal of Concrete Structures and Materials, 7 (1), 61–69. (2013).
[6]
De Brito, J., & Saikia, N. Recycled aggregate in concrete: Use of industrial, construction and demolition waste. 445 p., London, UK: Springer. (2013).
[7]
Akbarnezhad, A., Ong, K. C. G., Tam, C. T., & Zhang, M. H.. Effects of the parent concrete properties and crushing procedure on the properties of coarse recycled concrete aggregates. Journal of Materials in Civil Engineering, 25 (12), 1795–1802. (2013).
[8]
Silva, R. V., de Brito, J., & Dhir, R. K. Prediction of the shrinkage behavior of recycled aggregate concrete: A review. Construction and Building Materials, 77, 327–339. (2015).
[9]
Ulloa, V. A., García-Taengua, E., Pelufo, M. J., Domingo, A., & Serna, P. New views on effect of recycled aggregates on concrete compressive strength. ACI Materials Journal, 110 (6), 1–10. (2013).
[10]
Xiao, J., Li, L., Tam, V. W., & Li, H. The state of the art regarding the long-term properties of recycled aggregate concrete. Structural Concrete, 15 (1), 3–12. (2014).
[11]
Medina, C., Zhu, W., Howind, T., Sanchez de Rojas, M. I., & Frias, M. Influence of mixed recycled aggregate on the physical-mechanical properties of recycled concrete. Journal of Cleaner Production, 68 (1), 216–225. (2014).
[12]
Garg, P., Singh, H., & Walia, B. S. Optimum Size of Recycled Aggregate. GE-International Journal of Engineering Research. pp. 35–41, (2013).
[13]
Sim, J., & Park, C. Compressive strength and resistance to chloride ion penetration and carbonation of recycled aggregate concrete with varying amount of fly ash and fine recycled aggregate. Waste Management, 31 (11), 2352–2360. (2011).
[14]
Thomas, C., Setien, J., Polanco, J. A., Alaejos, P., & Sanchez de Juan, M. Durability of recycled concrete aggregate. Construction and Building Materials, 40, 1054–1065. (2013).
[15]
Fathifazl, G., & Razaqpur, A. G. Creep rheological models for recycled aggregate concrete. ACI Materials Journal, 110 (2), 115–126. (2013).
[16]
Kou, S. C., & Poon, C. S.. Enhancing the durability properties of concrete prepared with coarse recycled aggregate. Construction and Building Materials, 35, 69–76. (2012).
[17]
Chen, H.-G., & Ying, J.-W. Analysis of factors influencing durability of recycled aggregate: A review. Paper presented at the electric technology and civil engineering, Lushan. (2011).
[18]
Kwan, W. H., Ramli, M., Kam, K. J., & Sulieman, M. Z. Influence of the amount of recycle coarse aggregate in concrete design and durability properties. Construction and Building Materials, 26 (1), 565–573. (2012).
[19]
Manzi, S., Mazzotti, C., & Bignozzi, M. C. Short and long-term behavior of structural concrete with recycled concrete aggregate. Cement & Concrete Composites, 37, 312–318. (2013).
Browse journals by subject