Effect of ozone treatment on softwood soda lignin-based water reducer performance for concrete

A lignin-based water reducer for concrete was prepared from softwood soda lignin. The lignin and the lignin-polyethylene glycol (PEG) derivative were modified with ozone to improve their performance as reducers. of ozone-treated superior than untreated commercial lignosulfonate-type reducers in mortar flow test. treated a high charge showed better low charge. treatment improved lignin-PEG well. longer PEG chain length that shorter chain. zeta potential cement suspension higher negative value data analysis suggested electrostatic repulsion force particles would be larger