EVALUATION OF WATER ABSORPTION PERFORMANCE OF VARIOUS PS ASHES PRODUCED WITH DIFFERENT INCINERATION METHODS AND ITS APPLICABILITY FOR MUD IMPROVEMENT

Abstract

 PS (Paper Sludge) ashes are discharged from paper mills. In this study, to efficiently utilize them for the treatment of sludge or construction waste soil, a simple testing method is developed to measure the water absorption performance of PS ash. From the test, the performance index named as water absorption ratio wab can be obtained. By using the index, water absorption characteristics of various PS ashes produced with different incineration methods can be evaluated. Furthermore, in order to obtain more stable and higher water absorption performance from the various PS ashes, several treatment methods considering the incineration conditions were also developed. Then a mixture design method which consider the consistency characteristics of mud and water absorption performance of PS ash simultaneously, is proposed for the mud modification. Finally, the effects of particle crushing of PS ashes on the water absorption performance are investigated.