Alkali-activated fly ash foams for narrow-trench reinstatement

Unlike with traditional earthfill, materials used in the reinstatement of narrow-trenching must satisfy certain engineering properties. Otherwise, the ongoing traffic and environ- mental condition will damage the trench, degrade the road pavement and damage the service-lines that were installed. This report identifies eight mixtures using Fly Ash as the alumino-silicate precursor to prepare alkali-activated foams, cast to densities between 600...