7th IMRMPT

Abstract

Abstract information

English title:	nfluence on the mechanical strength and durability of cementitious mixtures added with surface modified elastomers as potential corrosion inhibitors in aggressive environments.
Spanish title:	Influencia en la resistencia mec�nica y durabilidad de las mezclas cementantes adicionadas con elast�meros modificados superficialmente como potenciales inhibidores de corrosi�n en ambientas agresivos.
English abstract:	Tire residues generated and not disposed of correctly can be considered as the main pollutants in modern times. In addition, the disposal in depots has revealed inconveniences due to the exhaustion of available sites and propensity to sanitary infections. Therefore, in order to reduce the environmental impact, the alternative use of tire waste as an additive for cement mortars is proposed. To this end, the present investigation superficially modified tire elastomers by means of oxidation and sulfonation processes to produce an increase in adhesion forces with inorganic compounds such as cement and subsequently protect it from acid attacks. For this purpose, the conformational materials of the cementitious mixtures were characterized by X-ray diffraction, X-ray fluorescence and density. Subsequently, the elastomer was morphologically characterized by scanning electron microscopy, thermogravimetry, infrared and Raman spectroscopy, together with energy dispersive X-ray fluorescence and hydrophobic tests by contact angle techniques. The particle size was then controlled by 100, 50 and 30 sieve, together with the concentration at 0%, 1%, 3% and 5% in the cementitious matrix. The results showed a slight reduction in mechanical strength in non-aggressive environments. However, when the mortars were subjected to acid attack (H2SO4, pH 2.5), the resistance increased up to 24% with the elastomers of greater surface area and increased the contact surface with the cementitious matrix up to 300%. The above allowed establishing the potential use of the chemically treated elastomer in commercial cements as a reducer of negative effects in aggressive environments and applicable use of contaminating waste�like�tires.
Spanish abstract:	Los residuos de llantas generados y no desechados correctamente pueden ser considerados como los principales contaminantes en la modernidad. Adem�s, la eliminaci�n en dep�sitos, ha revelado inconvenientes por el agotamiento de sitios disponibles y propensi�n a infecciones sanitarias. Por consiguiente, en b�squeda reducir el impacto ambiental, se plantea el uso alternativo de los desechos de las llantas como aditivo para morteros de cemento. para este fin, la presente investigaci�n modific� superficialmente elast�meros de neum�ticos mediante procesos de oxidaci�n y sulfonaci�n para producir un aumento e fuerzas de adhesi�n con compuestos inorg�nicos como el cemento y posteriormente proteger al mismo de ataques �cidos. Para este fin se caracterizaron los materiales conformacionales de las mezclas cementantes por Difracci�n de rayos X, fluorescencia de rayos X y densidad. Posteriormente se caracteriz� morfol�gicamente el elast�mero mediante microscopia electr�nica de barrido, termogravimetr�a, espectroscopia infrarroja y Raman, jnto con fluorescencia de rayos X por energ�a dispersiva y ensayos hidrof�bicos mediante t�cnicas de �ngulo de contacto. Luego se control� el tama�o de part�cula mediante tamiz 100, 50 y 30, junto con la concentraci�n al 0%, 1% 3% y 5% en la matriz cementante. Los resultados arrojaron una leve reducci�n de resistencia mec�nica en ambientes no agresivos. No obstante, al someter los morteros a ataque acido (H2SO4, pH 2,5), la resistencia aumenta hasta un 24% con los elast�meros de mayor �rea superficial y aumento en la superficie de contacto con la matriz cementante hasta un 300%. Lo anterior permiti� establecer el potencial uso del elast�mero tratado qu�micamente en cementos comerciales como reductor de efectos negativos en ambientes agresivos y uso aplicable de residuos contaminantes como los neum�ticos.
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Authors

Name	Institution	Email
Gina Karyn Mora Rodriguez	Universidad Pedag�gica y Tecnol�gica de Colombia	gina.mora@uptc.edu.co
Carlos Gabriel Hern�ndez Carrillo	Universidad Pedag�gica y Tecnol�gica de Colombia	carlosgabriel.hernandez@uptc.edu.co
Yaneth Pineda Triana	Universidad Pedag�gica y Tecnol�gica de Colombia	Yaneth.pineda@uptc.edu.co

Presentation

Room:	Principal Room
Date:	June 8, 2023
Hour:	15:20 - 15:40

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7^th IMRMPT
Seventh International Meeting for Researchers in Materials and Plasma Technology

Previous editions:

        1st IMRMPT 2011
        2nd IMRMPT 2013
        3rd IMRMPT 2015
        4th IMRMPT 2017
        5th IMRMPT 2019
        5+1 IMRMPT 2021

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