The results obtained showed that the desulphurization residues containing a number of CaSO_3 may be used as a retarder,and be better by adding with gypsum.

• 研究结果表明:亚硫酸钙含量较多的脱硫灰可用作水泥的调凝剂,并且与二水石膏复掺后的效果更好。