Studies on Manufacturing Possibility of Paper Sludge- Cement Board (I) -Measurement of Inhibitory Index by Hydration Reaction-

제지(製紙) Sludge-Cement Board의 제조가능성(製造可能性)에 관(關)한 연구(硏究)(I) -수화반응(水和反應)에 의(依)한 경화장해지수측정(硬化障害指數測定)-

This experiment was carried out to investigate the reaction of hydration of paper sludge during the setting of portland cement in a paper sludge, wood-cement-water mixturte. The percentage of paper sludge per cement is 7.5%, 15%, 30% respectively. The result indicated that the sludge of 7.5% had the most effect on reaction of hydration, and the sludge of 15% had moderately inhibitory effect but there is still possibility to make sludge-cement board. Paper sludge of 30%, Pinus koraiensis Sieb. et Zucc and Populus euramericana Guinier were proved to have the worst inhibitory effect on cement hydration, so pretreatment will be needed before making board with paper sludge-cement mixture.