利用天然石膏形态组成模拟钛石膏及其性能研究.pdf

第17卷第3期
建筑材料学报
Vol 17, No.3
学金
2014年6月
JOURNAL OF BUILDING MATERIALS
Jun,,2014
文章编号:1007-9629(2014)03-0511-06
利用天然石膏形态组成模拟钛石膏及其性能研究
杜传伟,李国忠,陈娟
(济南大学建筑材料制备与测试技术山东省重点实验室,山东济南250022)
摘要:利用天然石青模拟钛石膏的物理形态和化学组成,对比研究天然石膏、钛石膏以及模拟钛石
膏的物理性能.控制粉磨时间使天然石膏与钛石膏的比表面积、平均粒径以及颖粒級配情况基本
相同,掺加Fe(OH)等杂质使两者化学组成基本相同,通过系列性能研究寻求影响形态模拟钛石
膏物理性能的主要因素结果表明:比表面积对形态模拟钛石膏物理性能有一定影响,随着比表面
积增大,其标稠用水量增大,力学强度降低;Fe(OH)3对钛石膏物理性能彩响显著,随着Fe(OH)3
含量的增加,其标稠用水量显著增大,力学强度急剧降低
关键词:钛石膏;模拟钛石膏;天然石膏;比表面积;Fe(OH)3
中图分类号:TQ177.3
文献标志码:A
doi:10.3969/j.issn.1007-9629.2014.03.025
Simulation of Titanium Gypsum with Morphology and Composition
of Natural Gypsum and Its Property
DU Chuanwei, LI Guozhong, CHEN Juan
(Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
University of Jinan, Jinan 250022, China)
Abstract The physical morphology and chemical composition of titanium gypsum was simulated with natu
ral gypsum. The physical properties of natural gypsum, titanium gypsum and simulated titanium gypsum
were comparatively studied. The natural gypsum were prepared that had the same specific surface area, av
erage particle size and particle size distribution as those of titanium gypsum by controlling grinding time
The chemical compositions of natural gypsum and titanium gypsum were basically same by adding ferric
hydroxide into natural gypsum. The main factors which affect the physical properties of titanium gypsum
were found through a series of performance study. The results show that the specific surface area has a cer-
tain influence on the physical properties of titanium gypsum. The water for standard consistency of simula-
ted titanium gypsum increases and the mechanical strength decreases with the increase of specific surface
area. The amount of ferric hydroxide added has significant influence on the physical properties of titanium
gypsum. The water content for standard consistency increases significantly and a sharp decrease of the me
chanical strength occurs with increasing content of ferric hydroxide
Key words: titanium gypsum; simulated titanium gypsum; natural gypsum; specific surface area
ferric hydroxide
钛石膏是采用硫酸法生产钛白粉时,加入石灰膏含水率大、黏性大,而且含有其他杂质,活性低,水
以中和大量酸性废水而得到的以二水石膏为主要成化进程缓慢,强度不易得到发挥,难以有效利用,从
分的工业废渣.不经任何处理情况下,排放的钛石而长期作为一种固体废弃物被大量堆置.仅2012
收稿日期:2013-09-17;修订日期:2013-12-10
第一作者:杜传伟(1978-),女,山东济南人,济南大学硕士.E-mail:duchuanwei0815@126.com
通信作者:李国忠(1936-),男,山东济南人,济南大学教授,硕士生导师,硕士.E-mail:mse_ligz(@ujn.edu.cn