STUDY THE EFFECT OF USING LOCAL MATERIALS AS REFRACTORY BONDING MORTAR IN IRAQI

Abstract

In this research, Iraqi bauxite was used as raw material, after preparation the producing a grog. The mix proportion was applied, (96:4), (93:7) and (90:10) as (bauxite grog: kaolin binding ), and the sodium silicate solution as adhesive material 5% by weight of the mix.The burning temperatures for specimens' producing were 1450 C. The physical investigation was carried such as (bulk density, specific gravity, apparent of porosity and water absorption). While the mechanical tests (compressive, bonding) strength, durability investigations such as (thermal shrinkage, reheating expansion and thermal shock). It was found the third group recorded the highest compression and bonding strength and thermal shock resistance and the best physical properties after burning at 1450 C, with mix proportion (90: 10).

Keywords

• refractory mortar
• local materials
• thermal shrinkage
• bonding strength
• compressive strength