Microbial biocementation
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United States of America Patent
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May 22, 2012
Grant Date -
Oct 9, 2008
app pub date -
Dec 20, 2005
filing date -
Dec 20, 2004
priority date (Note) -
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Abstract
A method of forming a high strength cement in a permeable starting material, the method comprising the step of combining the starting material with effective amounts of (i) a urease producing micro-organism; (ii) urea; and (iii) calcium ions and wherein the effective amount of the urease producing organism provides a urea hydrolysis rate, under standard conditions, of 0.5-50 mM urea hydrolysed.min−1.
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