EFFECT OF RICE HUSK ASH ON DURABILTY PROPERTIES OF GLASS CONCRETE

Abstract

Exploration of alternative materials to produce green concrete is in the rise. One promising material is pulverized waste glass (WG), but it is susceptible to alkali-silica reaction (ASR), requiring remediation with Supplementary Cementitious Materials (SCM) such as Fly ash, Volcanic Ash, Rice Husk Ash (RHA). However, most research efforts have focused on using Fly Ash instead of other SCMs particularly RHA. Concrete mixtures were prepared according to ASTM C1567 standard, incorporating pulverized soda lime waste glass and a blend of Portland cement and RHA as binders. Different levels of RHA replaced cement to assess its effectiveness in controlling ASR. The effect of RHA and WG on Durability properties of the concrete were determine using South African Durability Index Method. Results indicated the reduction of about 52% and 33% in chloride conductivity and oxygen permeability index respectively. Concrete containing high percentage of RHA has the ability to considerably decrease CCL values, indicating an increase ability to resist chloride ion transport in the concrete. The optimal replacement level of 12.5% RHA can be suitable for structural concrete. It is recommended that the developed concrete should be applied in areas where resistance to chloride ion penetration is needed.