Abstract: Shaped articles with a coherent matrix which comprises homogeneously arranged inorganic solid particles (A) of a size of from about 50 .ANG. to about 0.5 micron, such as silica dust particles, and densely packed solid particles (B) having a size of the order of 0.5-100 micron and being at least one order of magnitude larger than the respective particles A, such as Portland cement particles, the particles A being homogeneously distributed, especially densely packed, in the void volume between the particles B, are made from an easily flowable composite material containing a very low amount of liquid and an extremely high amount of a dispersing agent, such as a concrete superplasticiser.

Abstract: A compact reinforced composite comprising a matrix (A) with a reinforcement (B) embedded therein, the matrix (A) being a composite structure comprising a base matrix (C) which is reinforced with reinforcing bodies (D) in the form of fibers. The transverse dimension of (B) being at least 5 times as large as the transverse dimension of (D).

Abstract: Densified systems and articles made therefrom which contain a composite material comprising a coherent matrix of homogeneously arranged inorganic particles (A) of a size of from about 50 .ANG. to about 0.5 3/4, such as silica dust, and densely packed particles (B) having a size of from 0.5-100 .mu. such as Portland Cement and which are at least one order of magnitude larger than the particles A, and embedded in the matrix, solid particles C made from material having a strength exceeding that of ordinary sand and stone used for ordinary concrete, such as refractory grade bauxite and a surface active dispersing agent. Particles A are homogeneously distributed and especially densely packed, in the void volume between the particles B and are made from an easily flowable composite material containing a very low amount of liquid such as water and an extremely high amount of a dispersing agent such as a concrete superplastisizer.