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减水剂对建筑石膏作用效果影响因素的研究
Study on the Factors of Influencing Water-reducing Effect of Superplasticizers in Building Gypsum
2006年第2期
建筑石膏;高效减水剂;细度;掺法;pH值
Building gypsum; Superplasticizers; Fineness; Addition method; pH value
2006年第2期
1000-4637(2006)02-08-03
国家自然科学基金资助项目(50078055)
彭家惠,操雪荣,瞿金东,张建新,谢厚礼
重庆大学建材系,400045

彭家惠,操雪荣,瞿金东,张建新,谢厚礼

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摘 要:为了提高建筑石膏中减水剂的使用效率,试验研究了建筑石膏比表面积、减水剂掺法、pH值等因素对建筑石膏分散性和强度的影响,并对其影响规律进行了分析。结果表明适当增加建筑石膏细度可提高减水剂的使用效率;不同掺法的减水剂作用效果存在较大差异,先掺法效果最好;pH值对减水剂分散效果有一定影响,在弱碱性条件下减水剂分散效果最好。 Abstract: In order to improve the water-reducing efficiency of superplasticizers, the influence of superplasticizer on the dispersion and strength of building gypsum was investigated from the point of specific surface area of gypsum particles, addition method of superplasticizers and pH value, and their influencing rules were also analyzed. The results indicate that appropriate increase in fineness of gypsum particles will improve the water-reducing efficiency of superplasticizers. And superplasticizers with different addition methods behave as a different way. Besides, the dispersion effect of superplasticizers is in the best when they are mixed into gypsum prior to adding the water and pH value also has the influence on the dispersion of superplasticizers which is in the best under weakly alkalescent environment.
英文名 : Study on the Factors of Influencing Water-reducing Effect of Superplasticizers in Building Gypsum
刊期 : 2006年第2期
关键词 : 建筑石膏;高效减水剂;细度;掺法;pH值
Key words : Building gypsum; Superplasticizers; Fineness; Addition method; pH value
刊期 : 2006年第2期
DOI :
文章编号 : 1000-4637(2006)02-08-03
基金项目 : 国家自然科学基金资助项目(50078055)
作者 : 彭家惠,操雪荣,瞿金东,张建新,谢厚礼
单位 : 重庆大学建材系,400045

彭家惠,操雪荣,瞿金东,张建新,谢厚礼

摘要
参数
结论
参考文献
引用本文

摘   要:为了提高建筑石膏中减水剂的使用效率,试验研究了建筑石膏比表面积、减水剂掺法、pH值等因素对建筑石膏分散性和强度的影响,并对其影响规律进行了分析。结果表明适当增加建筑石膏细度可提高减水剂的使用效率;不同掺法的减水剂作用效果存在较大差异,先掺法效果最好;pH值对减水剂分散效果有一定影响,在弱碱性条件下减水剂分散效果最好。

Abstract: In order to improve the water-reducing efficiency of superplasticizers, the influence of superplasticizer on the dispersion and strength of building gypsum was investigated from the point of specific surface area of gypsum particles, addition method of superplasticizers and pH value, and their influencing rules were also analyzed. The results indicate that appropriate increase in fineness of gypsum particles will improve the water-reducing efficiency of superplasticizers. And superplasticizers with different addition methods behave as a different way. Besides, the dispersion effect of superplasticizers is in the best when they are mixed into gypsum prior to adding the water and pH value also has the influence on the dispersion of superplasticizers which is in the best under weakly alkalescent environment.

关键词:
建筑石膏;高效减水剂;细度;掺法;pH值
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建筑石膏比表面积在8130cm2/g以内,减水剂吸附量、分散性与建筑石膏比表面积正相关,适当增加建筑石膏比表面积可提高提高减水剂的使用效率。减水剂先掺法效果最好,滞后掺次之,同掺法最差。pH值对减水剂分散效果有一定影响,在弱碱性条件下减水剂分散效果最好。

[1] Odler I,R??ler M.Relationships between pore structure and strength of set gypsum pastes, PartⅡ:Influence of chemical admixtures[J].Zement-Kalk-Gips,1989(10):266-268
[2] Koslowski TH,Ludwig U.The effect of admixtures in the production and application of building plasters[J].ZKG International,1999(5):274-285
[3] 陈健中. 混凝土减水剂对β-半水石膏性能的影响[J].新型建筑材料,1995(2):5-9
[4] Peng Jiahui,Qu Jindong,Zhang Jianxin,Chen Mingfeng,Wan Tizhi.Adsorption characteristics of water-reducing agents on gypsum surface and its effect on the rheology of gypsum plaster[J].Cement and Concrete Research,2005,35:527-531
[5] 彭家惠,张建新,陈明凤,瞿金东.石膏减水剂作用机理研究[J].硅酸盐学报,2003,31(11):1031-1036
[6] K. S. Birdi.Surface and Colloid Chemistry.CRC Press. Boca.New York.1997:594-597

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