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Preparation of Cement Water-Reducer by Sulfonation Modifying of Wheat Straw Hydroxymethyl Ethanol Lignin

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Abstract:

Modified lignin cement water-reducer was prepared via hydroxymethylation followed sulfonation of wheat straw ethanol lignin. The optimum process conditions of sulfonation of wheat straw ethanol lignin were mainly investigated. Fourier transform infrared spectroscopy (FT-IR) was performed to characterize the chemical structure of mofified ethanol lignin. Its morphology was revealed by the scanning electron microscopy (SEM) observation. The application results showed that when the modified lignin dosage was 0.5% the fluidity of cement paste reached 208mm, water-reducing ratio was 14.9% which was 30.7% higher than using commercial Sodium Lignosulfonate; and with the addition of modified ethanol lignin, the 3 and 7 d compressive strengths of concrete are13.8 % and 9.9 % higher than using commercial Sodium Lignosulfonate respectively.

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Periodical:

Advanced Materials Research (Volumes 250-253)

Pages:

1011-1016

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.250-253.1011

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Online since:

May 2011

Authors:

Jin Bao Li, Mei Yun Zhang, Hui Juan Xiu, Jian Wu Cao

Keywords:

Cement Water-Reducer, Modification, Wheat Straw Ethanol Lignin

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

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