Although most of the work with expansive cement remains in the laboratory, interest is rising about expansive cements. Expansive cements are a mixture of portland cement, sulfo-aluminous cement and a stabilizer. These cements put together exert a expansive force. The degree of expansion depends on the type. Non-shrinking cements expand about .03 to .04 percent. Expansive cement proper extend 1 to 2.5 percent. Expansion affects concrete in the following ways. One is expansive cements have a somewhat lower initial strength but strength is equal at the end of the period to where it finally surpasses portland cement. The impermeability of the concrete is definitely superior but the cements themselves are very sensitive to moisture. Resistance to sulfates in water is also low. Applications it might be used for are bridges and foundations, pavement construction and roof slabs and road slabs.