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[1]窦尚,黎学润,沈晓冬.硫铝酸钙在低铁水泥熟料中的二次形成[J].南京工业大学学报(自然科学版),2017,39(02):16-22.[doi:10.3969/j.issn.1671-7627.2017.02.004]
 DOU Shang,LI Xuerun,SHEN Xiaodong.Secondary formation of C4A3$ in low iron cement clinker[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2017,39(02):16-22.[doi:10.3969/j.issn.1671-7627.2017.02.004]
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硫铝酸钙在低铁水泥熟料中的二次形成()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
39
期数:
2017年02期
页码:
16-22
栏目:
出版日期:
2017-03-20

文章信息/Info

Title:
Secondary formation of C4A3$ in low iron cement clinker
文章编号:
1671-7627(2017)02-0016-07
作者:
窦尚黎学润沈晓冬
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
DOU ShangLI XuerunSHEN Xiaodong
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
三氧化硫 硫铝酸钙 低铁水泥 形成过程
Keywords:
SO3 C4A3$ low iron cement formation progress
分类号:
TU528.042
DOI:
10.3969/j.issn.1671-7627.2017.02.004
文献标志码:
A
摘要:
主要研究硫铝酸钙(C4A3$)在低铁水泥熟料中的二次形成过程,以找到最佳配方及烧成制度,使得硫铝酸钙在低铁水泥体系中得以共存。利用X线衍射(XRD)结合Rietveld定量方法和热重-差示扫描量热(TG-DSC)分析,研究了SO3含量、烧成制度对硫铝酸钙形成的影响,以及熟料中各物相的形成过程。结果表明:在低铁情况下,C3S较难形成。由于一次烧成过程中硫的损失以及自身中间相含量低,难以结合硫,故不易形成C4A3$。而熟料掺CaSO4后进行二次热处理可获较好的效果。研究发现硫铝酸钙在低铁水泥体系中的形成温度区间为1 050~1 270 ℃,温度继续升高将会迅速分解,最佳处理制度是1 250 ℃保温处理1 h。
Abstract:
In order to obtain the best formulations and sintering process for 3CaO·3Al2O3·CaSO4(C4A3$)reformation,the reformation process of C4A3$ in the cement clinker with low iron content was explored.The influence of SO3 content and sintering process on the formation of C4A3$,and the evolution of the formation of clinker phases were examined using X-ray diffraction(XRD)Rietveld quantitative methods and differential scanning calorimetry and thermo-gravimetric(DSC-TG)analysis.Results showed that in the case of low iron clinker firing,it was difficult to form 3CaO·SiO2(C3S).Because of the loss of SO3 during the sintering and few amount of interstitial phases,it was difficult to form C4A3$.But the approach which clinker doped with S with a secondary heat treatment had a good effect.The formation temperature of C4A3$ in the low iron cement was about 1 050-1 270 ℃,beyond which it would rapidly decompose.The best firing system was annealed at 1 250 ℃ for 1 h.

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备注/Memo

备注/Memo:
收稿日期:2015-12-01
基金项目:江苏省高校优势学科建设工程; 国家高技术研究发展计划(863计划)(2015AA034701); 教育部创新团队项目(IRT_15R35); 江苏省博士后科研资助计划(1402059B)
作者简介:窦尚(1990—),男,江苏连云港人,硕士,主要研究方向为水泥熟料; 沈晓冬(联系人),教授,E-mail:xdshen@njtech.edu.cn.
引用本文:窦尚,黎学润,沈晓冬.硫铝酸钙在低铁水泥熟料中的二次形成[J].南京工业大学学报(自然科学版),2017,39(2):16-22..
更新日期/Last Update: 2017-03-20