适应于碱激发碳酸盐矿-矿渣胶凝材料的缓凝剂研究

长江科学院院报 ›› 2007, Vol. 24 ›› Issue (1): 36-39.

适应于碱激发碳酸盐矿-矿渣胶凝材料的缓凝剂研究

乔飞, 余其俊, 赵三银, 黄家琪, 殷素红, 文梓芸

出版日期:2007-02-01 发布日期:2012-03-05

Research on Retarder Available for Alkali ActivatedCarbonatite-Slag Cementitious Material

QIAO Fei, YU Qi-Jun, ZHAO San-Yin, HUANG Jia-Qi, YIN Su-Hong, WEN Zi-Yun

Online:2007-02-01 Published:2012-03-05

摘要/Abstract

摘要： 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。

Abstract: 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.

乔飞, 余其俊, 赵三银, 黄家琪, 殷素红, 文梓芸. 适应于碱激发碳酸盐矿-矿渣胶凝材料的缓凝剂研究[J]. 长江科学院院报, 2007, 24(1): 36-39.

QIAO Fei, YU Qi-Jun, ZHAO San-Yin, HUANG Jia-Qi, YIN Su-Hong, WEN Zi-Yun. Research on Retarder Available for Alkali ActivatedCarbonatite-Slag Cementitious Material[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2007, 24(1): 36-39.