Properties of Cement Compacts Prepared by High-Pressure Compaction.

Abstract

The purpose of this investigation was to determine the combined effects of fly ash as a partial replacement for portland cement and the use of high-pressure compaction in reducing the porosity and increasing the compressive strength of *prepared miniature compacts. Ac,,ordinq to current practice and theory, for specialized uses, portland cem:ent concrete materials with strengths approaching 20,000 psi (140 MPa) may be produced by reducing the amount of porosity present in the microstructure of the ". paste-natrix material. To accomplish this, both high-pressure coripaction and increased formation of c entitious products from a pozzolanic reaction have provided excellent results. However, judging from an extensive literature survey, the effect of conbining the two has not been examined.