Optimizing the mechanical properties of geopolymer paste containing calcined clay and soft clinker by Taguchi method

Articles in Press

Document Type : Research Article

Authors

1 Department of Chemistry, University of Sistan and Baluche stan, Zaheda n, Iran.

2 University of Sistan and Baluchestan

3 Department of Chemistry, Faculty of science, University of Sistan and Baluchestan, Zahedan. Iran.

Abstract

Geopolymer cement is a new and innovative material in the construction industry, with high performance and optimal efficiency, which is environmentally compatible with the use of pozzolans and aluminosilicate wastes, and can be used as an alternative to the emission of pollution in the production of Portland cement for the production of ordinary concrete. This article is about the synthesis of geopolymeric cement based on calcined clay in the Bedstar region of Khash city and improving its mechanical strength by adding dust clinker to cement rotary kilns. The experiments were designed using the Taguchi method. Taguchi proposed an L16 array model and 16 experiments were designed. The Al/Na ratio was considered equal to one. Different levels of silica modulus of the activating solution (0, 0.9, 1 and 1.1), percentage of dust clinker addition (0, 5, 10 and 15) and water-to-solid ratio (0.25, 0.3, 0.35 and 0.4) were investigated as the influencing factor and the resistance in 28 days of the samples was selected as the response factor. The samples were kept at a temperature of 23℃ and a humidity of 70% in a humid cabin. The results show that with an optimum silica modulus factor of 1.1, water-to-solid ratio factor of 0.25 and additive percentage factor of 15%, an average compressive strength of 24.81 MPa can be achieved.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 14 January 2025

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