논문 상세보기
pp.911-918
Waterworks sludge is currently disposed after being used in water treatment, spending enormous cost. In order to protect the environment and avoid wasting, this study aims to develop high-temperature clay bodies using waterworks sludge for art tiles. As starting materials, feldspar, clay, and waterworks sludge, in place of silica, were used by triangular coordinates. According to the results indicated, the 40% sludge contained bodies showed good results which have low water absorption and high fracture strength in physical properties and color for art tile. The result of analyses showed mainly mullite and anorthite were developed in the bodies. Addition of Ca volume or firing at the higher temperature promoted the formation of anorthite and improved the strengths of the body. When mullite and anorthite coexisted in the bodies, fracture strength and water absorption showed maximum value, but overuse of Ca caused growth in porosity and absorption. The body color was affected by color development of iron. When mullite was doped by Fe3+ hematite appeared red and then increase of anorthite by addition of Ca, the magnetite was detected in the body and they appeared from dark gray to black shade color. Bodies of art tiles using recycled waste materials and waterworks sludge showed comparative properties such as strength, absorption, and bending strength to those of traditional tiles.
