Geopolymeric structural building units and methods of manufacture thereof
First Claim
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.
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Abstract
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.
11 Citations
20 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17, 18, 19, 20)
- Al atomic ratio of less than or equal to 1.3;
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10. A process for producing a geopolymeric cement 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. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- Al atomic ratio of less than or equal to 1.3;
Specification