SILICA ENCAPSULATION OF UREOLYTIC BACTERIA FOR SELF-HEALING OF CEMENT-BASED COMPOSITES
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Sep 13, 2017
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Sep 14, 2016
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One aspect of the present invention is directed to a method of preparing encapsulated ureolytic cells. This method includes blending freeze dried ureolytic cells and an aqueous solution to form a base mixture; mixing the base mixture with a silicate-forming compound to form a blend comprising silica encapsulated ureolytic cells; and freeze drying the silica encapsulated ureolytic cells. The present invention also relates to a method of producing a self-healing concrete. This method comprises providing silica encapsulated freeze-dried ureolytic cells; mixing the silica encapsulated freeze-dried ureolytic cells with cement to form a mixture; and blending the mixture with a calcium salt and a urea solution to form a concrete mixture. Also disclosed are silica encapsulated ureolytic cells, a method of making a concrete form, and a cured concrete product.
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