Abstract: Selective dissolution method and nonlinear fitting method were used to measure the hydration degree of three raw materials ( coal gangue , slag and cement ) in coal gangue-slag-cement ternary blended systems , respectively .The drying shrinkage and compressive strength of pastes which incorporated with coal gangue and slag of different mix proportions were determined and analyzed .The results show that the blended cement paste containing 5%coal gangue and 25% slag can meet the composite material which has small drying shrinkage , high compressive strength .

Key words: coal gangue;slag;selective dissolution method;drying shrinkage;compressive strength