HU Fei ^1,2, XIONG Wei ^{1, 3}

(1. The National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333001; 2. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen,Jiangxi 333403; 3. School of Business Administration, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403)

Abstract: The deflocculation of the sodium-base bentonite by water-reduce agents were experimentally studied. Results show that the inorganic water -reducing agent sodium tripolyphosphate (STPP) can reduce the water content to about 47% ;sodium metasilicate nonahydrate can reduce the water content to 52%, and the polymer water-reducing agent GYLA can reduce the water content to about 53%. The compound of STPP and pc-67 has a good effect on sodium-based bentonite, reducing its water content to about 41% with the clay flow velocity of 18s. But the result could not repeat for calcium-base bentonite.

Key words:  ceramic water-reducing agent; polymer water-reducing agent; bentonite; deflocculation; clay