Nanoreinforced Concrete: Effect Of Gamma-irradiated SiO2 Nanoparticles

¹Posgrado en Ciencia de Materiales, Facultad de Química, UAEMex, Paseo Colón Esq. Paseo Tollocan, Toluca, México

²División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Querétaro. Av. Tecnológico s/n Esq. Gral.      Mariano Escobedo, Col. Centro Histórico 76000, Querétaro, México

³Centro de Física Aplicada y Tecnología Avanzada, UNAM, Boulevard Juriquilla 3001, Juriquilla, Querétaro, 76230, México

⁴Laboratorio de Investigación y Desarrollo de Materiales Avanzados (LIDMA), Facultad de Química, Universidad Autónoma del Estado de México, Km.12 de la carretera Toluca-Atlacomulco, San Cayetano 50200, México

Adv. Mater. Lett., 2016, 7 (2), pp 156-162

DOI: 10.5185/amlett.2016.6145

Publication Date (Web): Jan 04, 2016

Copyright © IAAM-VBRI Press

E-mail: cylaura@gmail.com

Abstract

The effect of gamma-irradiated SiO₂ nanoparticles on microstructure and mechanical properties of concrete was studied. SiO₂ nanoparticles were irradiated at different irradiation doses (10, 50, 100 and 150 kGy) and then analyzed by transmission electron microscopy, Fourier-transform infrared and Raman spectroscopies. Such ionizing treatment allowed improving the physical interactions between the nanoparticles and the cementitious matrix. Compressive strength and dynamical modulus of elasticity on concrete samples were determined. The results show significant improvements on these mechanical features when irradiated SiO₂ nanoparticles were added; having up to 127 % of improvement for compressive strength and a 24 % for elasticity modulus when comparing to non-irradiated nanoparticles-reinforced concrete. Such improvements are related to the microstructural changes of concrete analyzed by Infrared spectroscopy and observed by scanning electron microscopy. Research shows important advances in the development and understanding of microstructure for nanoreinforced concrete with irradiated SiO₂ nanoparticles.  

Keywords

Gamma irradiation, compressive strength, elasticity modulus, SiO₂ nanoparticles, concrete.