Properties of cement compacts produced by isostatic compaction

This paper describes a method of producing compacts from cement mixes with extremely low water-cement ratios by isostatic compaction. The main advantage of this procedure is the fact that such compacts exhibit a greater uniformity in the degree of compaction than those produced by unidirectional pressing. The resultant strength increases with increasing pressure of compaction and is higher if high-strength, rather than ordinary Portland cement, is used as a starting material. The strength also increases if silica fume or natural wollastonite with acicular crystal morphology is added to the starting mix