A shaped article, at least one domain of which has a three-dimensionally reinforced 
composite structure comprising of a matrix and a reinforcing 
system (2, 4, 5, 6), the reinforcing 
system comprising bodies such as bars, wires, cables, or plates embedded in the matrix and extending three-dimensionally in first (4, 5) second (2) and third (6) dimensions therein, the reinforcing 
system being tension interlocked in at least one dimension in that reinforcement components extending in the first and / or second dimension are tension interlocked to reinforcement components extending in the same dimension(s), but at a transverse distance therefrom, by 
transverse reinforcement components extending in a dimension transverse, to a plane or surface defined by the reinforcement in the first and / or second dimension. The matrix is preferably a dense 
cement-based matrix prepared from 
cement, microsilica, a concrete superplaticiser and water, or a metallic matrix. The shaped articles are capable of absorbing 
high energy with retention of a substantial degree of internal coherence, e.g. under 
exposure to 
high velocity impact.