研究了一些常用于碱矿渣水泥的缓凝剂，如硝酸铅、硝酸锌和氯化钠等对碱激发碳酸盐矿-矿渣胶凝材料凝胶时间的影响。结果表明：硝酸铅、硝酸锌在掺量大于3％时可以延长凝胶时间；氯化钠、硼酸钠可延长凝胶时间，但延长幅度小。研究发现外加剂BS对碱激发碳酸盐矿-矿渣胶凝材料具有很好的缓凝效果，可使浆体保持良好的流动性能，且有利于胶砂体强度性能的提高，其缓凝机理为BS与水玻璃快速反应并在矿渣表面形成一层保护膜。

The effect of some chemical retarders,often used for alkali activated cement such as Pb(NO₃)₂,Zn(NO₃)₂, and NaCl etc.,on the gelation time of alkali-activated carbonatite slag cementitious material (AACSCM) was investigated. The results are as follows: Pb(NO₃)₂ or Zn(NO₃)₂ has retarding effect when its addition is not less than 3% of blast furnace slag, and for NaCl or Na₂B₇O₄ the addition should not be less than 8%; chemical reagent BS can efficiently retard the gelation of AACSCM paste and improve the strength of AACSCM mortars. In addition, the fluidity of AACSCM paste can be kept constantly for 4 hours. The retarding effect of BS is mainly attributed to the formation of a protective layer on the surface of slag grain due to the reaction between BS and water glass.