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(11)    Patent No :    AP 2289   
(21)    Application No :    AP/P/2007/004042   
(22)    Filing Date :    20.12.2005   
(24)    Date of Grant &    21.10.2011   
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
AU    2004907195    20.12.2004

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW

(73) Applicant(s)

STICHTING DELTARES, Rotterdamseweg 185, 2629 HD

The Netherlands

(72) Inventors

AL-THAWADI Salwa Mutlaq Juma, Bahrain

CORD-RUWISCH Ralf, Australia

KUCHARSKI Edward Stanislaw, Australia

et al

(74) Representative



(51)    International  Classification   C04B24/00 (2006.01)

(54)    Title

Microbial biocementation

(57)    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

0.5-50mM urea hydrolysed.min-1.

(56)    Documents Cited :    US 2005/0029187    JP 08-169745


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