Title:
Adsorption of Lignosulphonates on Cement and the Hydration Products of Cements
Author(s):
B.O. Myrvold
Publication:
Symposium Paper
Volume:
239
Issue:
Appears on pages(s):
285-296
Keywords:
adsorption; cement; clinker; hydration products; lignosulphonates
DOI:
10.14359/18385
Date:
10/1/2006
Abstract:
The adsorption of sodium lignosulphonate onto cement was investigated. The cement has either been pre-hydrated or hydrated with the lignosulphonate present. The pre-hydrated cement particles grow with time, thus a larger surface is created and the plateaus in the adsorption isotherms increase. With lignosulphonate present there is hardly any growth of new surface. It is found that, a lignosulphonate that adsorbs strongly to the surface causes, less retardation than weakly adsorbed lignosulphonates. This can be explained by different interactions with the different minerals present.