Evaluación de las propiedades de resistencia y rigidez de mezclas compactadas de relaves de hierro filtrados con cemento Portland apiladas in situ
DOI:
https://doi.org/10.21703/0718-2813.2025.37.3234Palabras clave:
Relaves de hierro RH, Pilas de ensayo, Muestras no perturbadas, Resistencia a la compresión, Resistencia a la tracción, Módulo de corteResumen
El apilamiento en seco de relaves de hierro (RH) con materiales cementantes es una opción viable de depósito, pero su implementación a gran escala enfrenta desafíos. Por lo tanto, este estudio investiga los factores clave que influyen en la compactación en condiciones de terreno reales, incluido el contenido de humedad (contenido de humedad óptimo y contenido de humedad inferior al óptimo), frecuencia de vibración (0 Hz y 35 Hz) y el número de pasadas de rodillo (4P y 6P). Para lograr este objetivo, se construyó una pila experimental de RH en cinco capas diferentes utilizando una cantidad específica de cemento Portland como agente cementante (2.5% en peso sólido seco). Luego, se realizaron ensayos de laboratorio, como compresión no confinada, tracción y velocidad de pulso ultrasónico (UPV), en muestras no perturbadas para evaluar la resistencia a la compresión no confinada (qu), la resistencia a la tracción (qt) y el módulo de corte inicial (G0). Con base en los ensayos de laboratorio realizados en las muestras recolectadas en terreno, se concluyó que las muestras con contenidos de humedad más cercanos al contenido de humedad óptimo (CHO), expuestas a vibración y sujetas a seis pasadas de rodillo exhibieron un rendimiento mecánico superior. Este estudio proporciona información para optimizar el proceso de compactación para estructuras de pilas de RH a gran escala.
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