A cementitious dry lay mixture

摘要

A process for producing a hard material from a cementitious mixture includes the stops of blending together a cement constituent and a filler constituent whilst in a dry condition to provide a compactable homogeneous mixture, laying the dry mixture onto a substrate, sparingly applying water to the surface of the mixture to dampen the surface layer of the mixture for causing setting of the cement in said layer and subsequently applying more water for causing setting and hardening of the remainder of the cement. In the compactable homogeneous mixture, the relative proportions and grading of the constituents are such that the bulk compacted volume of finer particles exceeds the volume of voids between compacted coarser particles as determined in the absence of the finer particles and certain other relationships between the volumes of voids present are specified.