Emulation concrete(EC) is a kind of concrete with low elastic modulus and low strength and used to perform the dynamic failure test on simulation model. Since emulation concrete is quite brittle, a series of tests were carried out to evaluate two methods of improving the brittleness of the material with adding clay and fine rubber particles in emulation concrete. The test results of clay emulation concrete with different clay contents are compared with those of standard emulation concrete, and it is found that clay mixed in emulation concrete can improve its brittleness and the deformability. The mathematical model is established to well estimate the mechanical parameters for any clay emulation concrete with respect to clay content. The functions presented are helpful in establishing the targeted basic engineering properties of the clay emulation concretes for the mix design purposes. According to that, the researchers can find the mix proportion of the clay emulation concrete for the need of the test. Another way to improve brittleness of emulation concrete is to add fine rubber particles in the emulation forming rubberized concrete. By analyzing test results of rubberized emulation concrete, it is found that the material shows good deformation compatibility in fracturing process of specimens. The specimens do not show brittle fracture under the maximum load, but rather show ductile failure with large plastic deformation.