Preparation and homogeneity of polymer mud of underground diaphragm wall

Abstract

Abstract The preparation of homogeneous polymer mud has an important role in the underground diaphragm wall engineering. A homogeneous polymer mud of underground diaphragm wall was synthesized by a simple compounding method in this work. The prepared samples analyzed by infrared spectroscopy. The effects of different film-forming auxiliaries, thickening components and pH on the homogeneity of the diaphragm wall were studied through the measurement of viscosity and specific gravity. The results showed that the prepared polymer mud of underground diaphragm wall had the best homogeneity and stable viscosity in the following conditions: in the pH range of 8-10, the addition of bentonite as a filming auxiliary with 5 kg of puffing agent per ton, and the dosage of vegetable gum was about 10-20 kg in every 100 m3 of mud. The possible reasons of affected homogeneity were suggested.