Effect of Composition of Calcium Lignosulfonate on Setting of Portland Cement with Anhydrite

Abstract:

Calcium lignosulfonate (CL) was separated into three fractions with different molecular weight by using ultrafiltration membranes, and the effect of the composition of commercial CL on the setting time of Portland cement with anhydrite was studied in this paper. Results show that the CL fraction with the cut-off molecular weight of less than 150 (CL-A) shortens setting time most. Further analysis indicates that the content of reducing sugar in CL-A reaches to 15.3%, including mannose, glucose, galactose, xylose and arabinose, and these five kinds of monosaccharides are found to be the main components of inducing quick set of cement. Ultrafiltration is an effective method to remove most of the reducing sugar in CL and weaken the quick set of Portland cement with anhydrite.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 877-882
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.877
• Online since: July 2012
• Authors: Xiao Ping Wang, Yu Xia Pang, Dong Jie Yang, Hong Ming Lou, Xue Qing Qiu
• Keywords: Calcium Lignosulfonate, Portland Cement, Quick Set, Reducing Sugar

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