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Modified lignosulfonate superplasticizer and preparation method thereof
The invention discloses a modified lignosulfonate superplasticizer. The modified lignosulfonate superplasticizer comprises components in parts by weight as follows: 30-35 parts of alkali lignin, 0.1-0.2 parts of manganese dioxide, 1-2 parts of hydrogen peroxide, 5-8 parts of sodium sulfite, 0.1-0.2 parts of cetyl alcohol and 54.6-63.8 parts of water, and the sum of parts of the components is 100. The modified lignosulfonate superplasticizer further comprises an appropriate amount of concentrated sulfuric acid. Meanwhile, the invention further discloses a preparation method of the superplasticizer. The modified lignosulfonate superplasticizer and the preparation method have the advantages that the modified lignosulfonate superplasticizer can be independently used as a water reducer to be added to concrete to be used, the water reduction rate can be higher than 20%, the setting time can be prolonged by 0.5h, the gas content can be increased by 0.3%, the working performance of concrete is improved, alkali lignin serving as a main raw material comes from wheat straw pulp, accordingly, waste is recycled, and good economic benefits and social benefits are achieved.
Modified lignosulfonate superplasticizer and preparation method thereof
The invention discloses a modified lignosulfonate superplasticizer. The modified lignosulfonate superplasticizer comprises components in parts by weight as follows: 30-35 parts of alkali lignin, 0.1-0.2 parts of manganese dioxide, 1-2 parts of hydrogen peroxide, 5-8 parts of sodium sulfite, 0.1-0.2 parts of cetyl alcohol and 54.6-63.8 parts of water, and the sum of parts of the components is 100. The modified lignosulfonate superplasticizer further comprises an appropriate amount of concentrated sulfuric acid. Meanwhile, the invention further discloses a preparation method of the superplasticizer. The modified lignosulfonate superplasticizer and the preparation method have the advantages that the modified lignosulfonate superplasticizer can be independently used as a water reducer to be added to concrete to be used, the water reduction rate can be higher than 20%, the setting time can be prolonged by 0.5h, the gas content can be increased by 0.3%, the working performance of concrete is improved, alkali lignin serving as a main raw material comes from wheat straw pulp, accordingly, waste is recycled, and good economic benefits and social benefits are achieved.
Modified lignosulfonate superplasticizer and preparation method thereof
DENG MINGCHAO (author) / ZANG JUN (author) / QI YINXING (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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