Abstract: A composition is supplied for filling pot holes and other types of structural deterioration. The composition consist of hydraulic cement and an alkali metal silicate. The silicate includes a molar ratio of silican dioxide to alkali metal oxide from 0.4 to 4.0. The silicate is in a concentration ranging from 0.2 to 20 percent by weight of the cement. A method is also provided which comprises repairing a deteriorating structure by inserting therein a cementitious composition and controlling the rate of setting of the composition by the inclusion therein of sodium silicate in the molar ratio of silicon dioxide to sodium oxide of from 0.4 to 4.0.

Abstract: This invention relates to compositions, methods of production and uses of non-combustible nuclear radiation shields, with particular emphasis on those containing a high concentration of hydrogen atoms, especially effective for moderating neutron energy by elastic scatter, dispersed as a discontinuous phase in a continuous phase of a fire resistant matrix.