Abstract: With the rapid development of society, foundation soil pollution caused by vast waste water discharge has arising as a severe geoenvironmental problem. The changes in engineering properties of remolded loess polluted by hydrochloric acid and sodium hydroxide solutions are investigated via geotechnical test and resistivity test. The solutions are prepared at five different pH values. Result demonstrates that with the increase of acidity of the solution, the liquid limit,plasticity index, permeability coefficient, cohesive force and internal frication angle gradually increased, while electrical resistivity decreased; with the increase of alkalinity of the solution, the clay content, cohesive force, internal friction angle, and permeability coefficient increased, while liquid limit, plasticity index and electrical resistivity gradually decreased. Researching the effect of pH value of pore solution on properties of loess would offer reference for geoenvironmental practice.

Key words: remolded loess, geoenvironmental problem, acid-base pollution, pH value of pore solution, engineering property