Malan loess is a special water content sensitive geological deposit

of which the physico-mechanical and hydraulic properties change with obvious patterns under the softening action of water. Based on the test data of a large number of Malan loess carried out in Utrecht University of Netherlands and Lanzhou city of Gansu Province with different methods; here

we study the physico-mechanical properties of Malan loess. According to the results of loess tests in laboratory and in-situ

the geotechnical properties

some laws of water sensitivity and shear strength properties of Malan loess are discussed emphatically; and some important critical indices of Malan loess are put forward.