Utilization of andesite stone waste and fly ash as geopolymer pavement block materials

Abstract

Utilization of andesite stone and fly ash waste to be used as pavement block products has been carried out. The aim of this research is to utilize the residual waste of andesite stone and fly ash handicraft production as environmental building material products. The stages of this research included experimental design, material analysis using the XRF and XRD methods, testing prototypes and making pavement block prototypes. The experimental design used for the most optimal pavement block composition was the ratio of aggregate to binder of 65:35 with 14M NaOH. The water absorption test for pavement blocks with a composition of 65:35 14M is included in class A quality for a curing time of 28 days (SNI 03-0691-1996) while the converted compressive strength value is included in the quality between A and B for a curing time of 28 days. Pavement block prototypes printed in the form of square pavement 20x20x8 cm or rectangle 22x11x6 cm require 1 hour of mixing time to finish printing. The results on manual prints are 4 square pavement and 4 rectangular pavement with 36 kilograms of material.