Properties of modified concrete with crumb rubber: Effect of the incorporation of hollow glass microspheres

Abstract

In this study, the effect of incorporating hollow glass microspheres (HGM) on the mechanical properties of modified concrete with CR (crumb rubber) was evaluated. Different concrete samples replacing 15% of fine aggregates (total weight of CR + HGM = 15%) were prepared. It was found that the increase in the microsphere content was directly proportional to the slump, compressive strength, and the modulus of elasticity. The increase in the microsphere content was inversely proportional to density. Additionally, we found that in the modified concrete, the width, height and the number of cracks increased as the HGM content increases. The combined sample HGM12.5-CR2.5 (the one with the highest content of microspheres) resulted in concrete with the highest compressive strength of 19.1 MPa, which is 243% stronger than the concrete with only crumb rubber (9.2 MPa). From the XRD results, we were able to detect the presence of different phases formed by hydration during the process of preparing concrete mixtures. The micrographs allowed identifying the fracture in the microspheres during the preparation of the concrete mixtures when they came into contact with the aggregates. The addition of hollow glass microspheres to the mixtures prepared from crumb rubber improved their mechanical properties, and this makes it a potential system that can replace the traditional materials in the production of concrete.

Ecoladrillos: alternativa para aprovechamiento de arcilla y grano de caucho reciclado

“…Al igual que en el estudio de Lara Guerrero et al (2020), se cumplió con los estándares de calidad para producción de mampuesto exigidos en el país en donde se realizó la investigación. Así mismo, se comprueba la viabilidad térmica del material producido, tal y como lo revelan Villaquirán-Caicedo et al (2022), y un buen comportamiento mecánico con menor cantidad de caucho del que fue empleado por Valencia-Villegas et al (2021).…”

“…Para quienes tienen la inquietud de reciclaje de llantas se enfrentarán al reto particular del reciclaje del caucho, a razón de que este se produce de la mezcla de elastómeros con aditivos orgánicos, agentes vulcanizantes y cargas minerales (Peláez Arroyave et al, 2017). Bajo este principio, se busca incorporar los residuos de llantas a la cadena productiva de nuevos materiales (Sampaio et al, 2022) o extraer materiales existentes o subproductos obtenidos al recoger las llantas desechadas (Batayneh et al, 2018;Thomas et al, 2016) ratificando que la disposición a cielo abierto genera los problemas anteriormente mencionados (Tasalloti et al, 2021;Valencia-Villegas et al, 2021).…”

Preparation and Characteristics of High-Performance, Low-Density Metallo–Ceramics Composite

“…Syntactic foam is a composite material consisting of a matrix filled with hollow microspheres [29]. The microspheres, which are typically made of glass [30,31], ceramic [32,33], or polymer, are dispersed throughout the matrix material, which can be made from polymers [34,35], metals [36][37][38], or concrete and ceramics [39][40][41][42]. Metal foams have lightweight and high-energy absorption properties.…”