Geopolymeric structural building units and methods of manufacture thereof

摘要

The present invention provides a geopolymeric cement formed from a precursor having a relatively high alumina content (Si:Al atomic ratio of less than or equal to 1.3:1) to form an alkaline multiphase alumino-silicate material.;The precursor comprises basaltic rock in which kaolinization is at an advanced stage, preferably Interbasaltic material found in Northern Ireland.;The present invention also provides structural units for constructing a building, the structural units being manufactured using the geopolymeric cement of the invention.;The invention also provides a process for producing a geopolymeric cement comprising a precursor having a relatively high alumina content (Si:Al atomic ratio of less than or equal to 1.3:1) to form an alkaline alumino-silicate geopolymer material for manufacturing geopolymeric structural building units having compressive strengths of greater than 3 N/mm2 and preferably having compressive strengths in the range of 12-25 N/mm2.

主权项

1. A geopolymeric cement formed from a precursor having a Si:Al atomic ratio of less than or equal to 1.3:1 and an alkali metal hydroxide and alkali silicate solution to form an alkaline alumino-silicate material, and wherein the precursor comprises weathered basaltic rock which is comprised of between 20% to 80% w/w of kaolinite with the remaining 80% to 20% w/w made up of smectites, iron oxides, gibbsite and olivine residual materials.