Quantitative Comparison of Binary Mix of Agro-Industrial Pozzolanic Additions for Elaborating Ternary Cements: Kinetic Parameters

Ernesto Villar-Cociña; Moisés Frías; Holmer Savastano; Loic Rodier; María Isabel Sánchez de Rojas; Isabel Fuencisla Sáez Del Bosque; César Medina

doi:10.3390/ma14112944

Quantitative Comparison of Binary Mix of Agro-Industrial Pozzolanic Additions for Elaborating Ternary Cements: Kinetic Parameters

Materials (Basel). 2021 May 29;14(11):2944. doi: 10.3390/ma14112944.

Authors

Ernesto Villar-Cociña¹, Moisés Frías², Holmer Savastano³, Loic Rodier³, María Isabel Sánchez de Rojas², Isabel Fuencisla Sáez Del Bosque⁴, César Medina⁴

Affiliations

¹ Department of Physics, Central University of Las Villas, Santa Clara 54830, Cuba.
² Materials Recycling Department, Eduardo Torroja Institute (CSIC), c/Serrano Galvache, 4, 28033 Madrid, Spain.
³ Research Nucleus on Materials for Biosystems, University of Sao Paulo, P.O. Box 23, Pirassununga 13635-900, SP, Brazil.
⁴ Department of Construction, Institute for Sustainable Regional Development (INTERRA), University of Extremadura, Avda. De la Universidad, s/n, 10003 Cáceres, Spain.

Abstract

In this research work, the quantitative characterization of a binary blend comprised of two pozzolans (sugar cane straw (SCSA)-sugar cane bagasse ashes (SCBA), bamboo leaf ash (BLAsh)-SCBA and paper sludge (PS)-fly ash (FA)) taking into account the calculated values of the kinetic parameters of the reaction in the pozzolan/calcium hydroxide system is shown. The paper shows the most significant and important results obtained by the authors in the quantitative assessment (calculation of kinetic parameters) of the pozzolanic reaction of different mixtures of pozzolanic materials that are residues from agriculture or industrial processes. This allows a direct and rigorous comparison of the pozzolanic activity of the binary combinations of materials. The values of the kinetic parameters (reaction rate constant or activation free energy) constitute a very precise quantitative index of the pozzolanic activity of the binary combinations of materials, which is very useful for its employment in the elaboration of ternary cements. This paper shows that the binary blends 1SCBA60Blash40, 1SCBA50Blash50, 1SCBA70Blash30 have a very high pozzolanic reactivity followed by PSLSFA, 2SCBA50SCSA50, PSISFA and SCWI.

Keywords: binary combinations; kinetic parameters; kinetic-diffusive model; pozzolanic activity; quantitative characterization; ternary cements.