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Advances in Civil Engineering
Volume 2018, Article ID 3780810, 10 pages
Research Article

Optimal Cement Mixtures Containing Mineral Admixtures under Multiple and Conflicting Criteria

1Department of Industrial Engineering, University of Puerto Rico, Mayagüez, PR, USA
2Department of Civil Engineering and Surveying, University of Puerto Rico, Mayagüez, PR, USA
3Department of Engineering Science and Materials, University of Puerto Rico, Mayagüez, PR, USA

Correspondence should be addressed to Hildélix L. Soto-Toro; ude.rpu@otos.xiledlih

Received 6 July 2017; Revised 3 November 2017; Accepted 15 November 2017; Published 17 January 2018

Academic Editor: Tayfun Dede

Copyright © 2018 Nitza M. García et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In modern construction industry, fabrication of sustainable concrete has turned the decision-making process into a challenging endeavor. One alternative is using fly ash and nanostructured silica as cement replacements. In these modern mixtures, proper concrete bulk density, percentage of voids, and compressive strength normally cannot be optimized individually. Hereby, a decision-making strategy on the replacement of those components is presented while taking into account those three performance measurements. The relationships among those components upon concrete fabrication required a design of experiments of mixtures to characterize those mineral admixtures. This approach integrates different objective functions that are in conflict and obtains the best compromise mixtures for the performance measures being considered. This optimization strategy permitted to recommend the combined use of fly ash and nanosilica to improve the concrete properties at its early age.