The basalt fiber is expected to become a trend for industrial fibers as they have better properties of heat-resistant, non-combustion, absorbent, soundproof, moistureproof, lightweight, corrosion resistant, and high strength properties. Also, the fiber is found to be non-toxic and harmless to the human body. Therefore, in this study, we analyzed the chemical and mineral compositions of powdered sludge of basalt produced at seven sites on Jeju Island for the development of fire resistance insulating material for a building. The results showed that the basalt stone sludge is made from only sodium calcium aluminum silicate and ferridioside components unlike the basalt rock.

A pink-colored china body has a feeling of warmth was manufactured using basalt sludge and white clay. Mechanicalproperties and microstructure of fired bodies were investigated by XRD, SEM and UV spectroscopic. The china bodycontaining 60wt% of basalt sludge fired at 1050oC for 30 min showed a bulk density of 1.76g/cm3, water absorption of16.25% and bending strength of 5.25N/mm2, and value of CIE L*, a*, b* is 67.64, 7.82, 8.17 respectively. A phase ofPiustite and maghemite included in basalt sludge transferred to phase of Hematite with a pink color under oxydationatmosphere, over 1,000oC. It appeared black when the firing temperature was higher than 1,100oC.