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Show Lignin Stabilizer Successful experiments have been made. in Quebec with lignin extract as a stabilizing material in road construction. con-struction. Lignin is a byproduct of the pulp and paper industry. Heretofore Here-tofore it has been regarded largely as a waste. In the Quebec experiment, experi-ment, lignin extract In powder form is mixed with gravel and clay, whereupon the mixture Is spread in layers and rolled. Lignin increases the bonding power of the clay to make a stabilized and semi-permanent mat. |