Nytt resirkulert tilslag produsert fra grave- og byggavfall

Abstract

Recycled aggregate produced from excavation and construction waste is an important resource. This is because increased use of recycled aggregate will contribute to reduce the amount of waste delivered to landfill, which is an important environmental benefit. Recycled aggregate will replace some of the application areas of natural crushed aggregate, this will reduce the extraction of primary raw materials. The focus of this master thesis is to investigate and document variations in mechanical properties of recycled aggregate produced from excavation mass. The purpose of this is to document the stability of mechanical properties and examine how changes in the source material will affect test results. Stable mechanical properties will contribute to an extended use of excavation mass, instead of being delivered as landfill. In order to investigate variations in recycled aggregate there is used methods like Los-Angeles, micro-Deval, petrographic analysis and x-ray diffraction (XRD). To get an overview of existing research on recycled aggregate and variations in mechanical properties, a literature review is conducted. In conclusion, the methods used shows consistently good results. Recycled aggregate is a well-suited material for road projects, and as filler in pipe trenches.