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超塑化剂对水泥早期水化影响的灰值分析
Gray Value Analysis for Effect of Superplasticizers on the Early Hydration of Cement
2009年第2期
混凝土外加剂;减水剂;水泥水化;背散射电子图像
Concrete admixture; Water reducer; Cement hydration;Backscattered electron image
2009年第2期
1000-4637(2009)02-21-03
张思佳,陈 龙,邢晓明,蒋亚清
河海大学材料科学与工程学院,南京210098

张思佳,陈 龙,邢晓明,蒋亚清

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摘 要:对掺萘磺酸盐缩合物减水剂和两种聚羧酸减水剂的水泥浆体水化24h的微观形貌进行了背散射电子图像测试及灰度值分析,发现超塑化剂对水泥早期水化具有重要影响,掺不同超塑化剂的水泥早期水化产物有所区别。试验同时还得出可利用灰度值来表征掺超塑化剂水泥的早期水化产物的结论。 Abstract:By using backscattered electron images for testing and analysing the grey value of the microstructure of cement pastes with respectively adding naphthalene formaldehyde condensate and two kinds of polycarboxylate type superplasticizers, cured for 24 hours, were tested. It is found that superplasticizers may strongly effect early hydration of cement, and there are some differences for early hydrates of cement when different superplasticizers are used. Grey value can be used to express the different hydration products of cement with superplasticizers at the early age.
英文名 : Gray Value Analysis for Effect of Superplasticizers on the Early Hydration of Cement
刊期 : 2009年第2期
关键词 : 混凝土外加剂;减水剂;水泥水化;背散射电子图像
Key words : Concrete admixture; Water reducer; Cement hydration;Backscattered electron image
刊期 : 2009年第2期
DOI :
文章编号 : 1000-4637(2009)02-21-03
基金项目 :
作者 : 张思佳,陈 龙,邢晓明,蒋亚清
单位 : 河海大学材料科学与工程学院,南京210098

张思佳,陈 龙,邢晓明,蒋亚清

摘要
参数
结论
参考文献
引用本文

摘   要:对掺萘磺酸盐缩合物减水剂和两种聚羧酸减水剂的水泥浆体水化24h的微观形貌进行了背散射电子图像测试及灰度值分析,发现超塑化剂对水泥早期水化具有重要影响,掺不同超塑化剂的水泥早期水化产物有所区别。试验同时还得出可利用灰度值来表征掺超塑化剂水泥的早期水化产物的结论。

Abstract:By using backscattered electron images for testing and analysing the grey value of the microstructure of cement pastes with respectively adding naphthalene formaldehyde condensate and two kinds of polycarboxylate type superplasticizers, cured for 24 hours,  were tested. It is found that superplasticizers may strongly effect early hydration of cement, and there are some differences for early hydrates of cement when different superplasticizers are used. Grey value can be used to express the different hydration products of cement with superplasticizers at the early age.

关键词:
混凝土外加剂;减水剂;水泥水化;背散射电子图像
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(1)超塑化剂对水泥早期水化具有一定影响。萘磺酸盐缩合物促进水泥水化,但不改变水化物结构,聚羧酸盐则使水泥水化物结构发生改变。
(2)利用BSE图像和灰度值分析,可定性表征水泥早期水化。
[1] 蒋亚清.混凝土外加剂应用基础[M].北京:化学工业出版社,2004. 
[2] Y.Q. Jiang, M. Z. Gong. Effect of superplasticizer type on early age hydration of cement [A]. In: Wei Sun, K. van Breugel, Changwen Miao etal. Proceedings of the first International Conference on Microstructure Related Durability of Cementitious Composites [C]. Paris, France: RILEM Publications S.A.R.L., 2008. Vol. 1: 153-160.
[3] W. Prince, M. Espagne, P. C. Aitcin. Ettringite formation: A crucial step in cement superplasticizer compatibility [J]. Cement and Concrete Research, 2003, 33 (5): 635–641.
[4] J. Plank, Ch. Winter. Competitive adsorption between superplasticizer and retarder molecules on mineral binder surface [J]. Cement and Concrete Research, 2008, 38 (5): 599–605.
[5] Karen L. Scrivener. Backscattered electron imaging of cementitious microstructures: understanding and quantification [J]. Cement & Concrete Composites, 2004, 26 (8): 935–945.
[6] Dale P. Bentz, Paul E. Stutzman. Curing, Hydration, and Microstructure of Cement Paste [J]. ACI Materials Journal, 2007, 103(5): 348-356.
[7] M. Ben Haha, E. Gallucci, A. Guidoum, K.L. Scrivener. Relation of expansion due to alkali silica reaction to the degree of reaction measured by SEM image analysis [J]. Cement and Concrete Research, 2007, 37 (8): 1206–1214.
[8] Johann Plank, Christian Hirsch. Impact of zeta potential of early cement hydration phases on superplasticizer adsorption [J]. Cement and Concrete Research, 2007, 37 (4): 537–542.

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