concrete admixture lignin cement additives
Lignin
CAS #: 8068-05-1
The alkali lignin, a natural polymer prepared from alkaline papermaking black liquor through concentration, filtration and spray and drying, has good physical and chemical properties such as cohesiveness, dilution, dispersibility, adsorptivity, permeability, surface activity, chemical activity, bioactivity and so on.
Indicators:
Appearance: Black or brown powder
Reducing substance: NMT 8%
Moisture: NMT 7%
pH value: 11.5 -13.5
Water insolubles: NMT 2.0%
Inorganic salt (NaSO4): NMT 5.0%
Total content of Ca and Mg: NMT 1.5%
Lignin: 45% - 60%
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