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浙江大学学报(工学版)
J4  2009, Vol. 43 Issue (7): 1302-1306    DOI: 10.3785/j.issn.1008-973X.2009.
材料与化学工程     
TiO2对高C3S熟料烧成的影响
陈胡星
（浙江大学 材料与化工学院,浙江 杭州 310027）
Effect of TiO2 on formation of clinker with high C3S
CHEN Hu-xing
（College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou 310027, China）
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摘要：

通过外掺TiO2来改善高C3S熟料的烧成.配制7个生料样品,其潜在矿物组成均为w(C3S)=75%、w(C3A)=7%、w(C4AF)=18%,TiO2掺量分别为0、05%、10%、15%、20%、25%、30%,在设定的高温下煅烧成熟料,通过化学分析、XRD、SEM/EDS等方法,研究了TiO2对熟料易烧性、矿相形成、C3S晶体形貌和熟料强度等的影响.结果表明,掺入少量TiO2明显提高了熟料的易烧性；当TiO2掺量小于2%时,f-CaO随TiO2掺量的增加而显著降低；当TiO2掺量超过2%后,f-CaO随TiO2掺量的变化不大；当TiO2掺量达到3%时,在1 350和1 400 ℃温度煅烧的熟料中均发现了CaO·TiO2新相；掺2%TiO2在1 400℃煅烧条件下的熟料,TiO2在C3S中的固溶量约1.7%；掺入适量的TiO2,熟料中C3S结晶比较完整、均匀,熟料强度较高.适当掺入TiO2对改善高C3S熟料的烧成和提高其强度都是有利的.
Abstract:

The effect of TiO2 on the formation of clinker with high C3S was investigated. 7 cement raw meals introduced 0, 0.5%, 1.0%,1.5%, 2.0%, 2.5% and 3% TiO2 respectively were prepared, with potential phases components, i.e., w(C3S)=75%, w(C3A)=7%, and w(C4AF)=18%. After being calcined, the f-CaO content and paste strength of clinkers were determined. The phases and its microstructure features, the solubility of TiO2 in C3S were further analyzed by X-ray diffraction (XRD), scanning electron microscope and energy dispersive spectroscopy (SEM/EDS). The results showed that f-CaO content of clinker decreased significantly as the addition of TiO2 increased when the addition was below 2%, but it remained unchanged when beyond 2%, and a new phase CaO·TiO2 could be found when the addition of TiO2 was up to 3% at both 1 350 and 1 400 ℃, the limit of solubility of TiO2 in C3S at 1 400 ℃ was about 1.7% when the addition of TiO2 was 2%, with suitable addition of TiO2, C3S crystal was well-formed in clinker and the strength of clinker was higher than the controlled one. It was concluded that suitable addition of TiO2 in raw meal would improve the burnability and the strength of the clinker with high C3S．
出版日期: 2009-07-01
:  TQ172  
基金资助:

国家科技支撑计划资助项目(2006BAF02A24).
作者简介: 陈胡星(1964-),男,浙江磐安人,副教授,从事水泥材料的研究.
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引用本文:

陈胡星. TiO2对高C3S熟料烧成的影响[J]. J4, 2009, 43(7): 1302-1306.

CHEN Hu-Xing. Effect of TiO2 on formation of clinker with high C3S. J4, 2009, 43(7): 1302-1306.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.    或    http://www.zjujournals.com/eng/CN/Y2009/V43/I7/1302

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