Preparation of Cement Water Reducer of Modified Lignosulfonate

被引：8

作者：

Wu, Xiuwen ^{[1
]}

Zhang, Heng ^{[2
,3
]}

机构：

[1] Dongguan Univ Technol, Coll Chem & Environm Engn, Dongguan 523808, Guangdong, Peoples R China

[2] Qingdao Univ Sci & Technol, Sch Chem Engn, Qingdao 266042, Shandong, Peoples R China

[3] Nanjing Forestry Univ, Key Lab Pulp & Paper Sci & Technol, Nanjing 210037, Jiangsu, Peoples R China

来源：

ADVANCES IN BUILDING MATERIALS, PTS 1-3 | 2011年 / 168-170卷

关键词：

Lignosulfonate; water reduction agent; synthesis;

D O I：

10.4028/www.scientific.net/AMR.168-170.541

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this paper, the cement water reduction agent from modified lignosulfonate was synthesizd using a new process consisting of pre-oxidation, hydroxymethylation and sulfonation. The optimum synthesis conditions were identified: the oxidizing agent dosage is 15%, reaction temperature is 80-90 degrees C, the dosage of formaldehyde is 30%, reaction temperature is about 95 degrees C, pH is about 9.5. Fluidity of cement paste can be measured under the conditions of the addition of 0.25%, and the water-cement ratio is 0.4%. The results showed the modified lignosulfonate prepared under the above conditions had the better slushing performance. The fluidity of cement paste can reach 178 mm that is close to the high efficiency water reduction agent requirements.

引用

页码：541 / +

页数：2