Influence of Adding Jordanian Scoria on the Properties of Clay-based Geopolymer

Abstract

This work aims to investigate the influence of adding Jordanian scoria on the characteristics of clay-based geopolymer. The clay deposit and scoria were gotten from north-east Jordan. The chemical, mineralogical, and microstructural properties of the used materials were examined. Scoria was added to clay-based geopolymer mixtures in different ratios: 0%, 10%, 20%, 30%, 40%, and 50%. Comprehensive experimental tests were conducted to assess the effect of adding scoria on the properties of the produced geopolymer. The results revealed decreased compressive strength and dry density, whereas porosity, water absorption, cation exchange capacity, and specific surface area increased as the ratio of scoria increased. The mineralogical and microstructural analysis of the geopolymers after adding scoria indicates the formation of mineral phases, namely hydroxy-sodalite and hydroxy-cancrinite in addition to the gel phase.