Self-repairing concrete having carbamide resin polymer micro-capsules and method for fabricating same
AssigneesShenzhen University, Feng Xing, Zhou Ni
InventorsFeng Xing, Zhuo Ni
Life of this patent
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Abstract
A self-repairing concrete includes carbamide resin polymer micro-capsules, in which the carbamide resin polymer micro-capsules are mixed for a fixed function of micro-cracks. The quality mixture ratio is: concrete/micro capsules/water=100:1-15:15-50. The manufacturing method is weighing a full amount of water in a container, adding carbamide resin polymer micro-capsules, stirring, until fully dispersed microcapsules; pouring the water into the mixing container, adding the corresponding quality of cement; stirring; adding sand and gravel filling materials, conducting worksite watering, ⅓ volume for each time, vibrating, and air exhausting; until the slurry filling mold.
Claims10
A self-repairing concrete comprising:
- cement, carbamide resin polymer micro-capsules, and water being mixed together to form a concrete structure, wherein a mass ratio of said cement, micro capsules, and water is 100:1-15:15-50, wherein each of said micro-capsules comprises a capsule wall and an adhesive received in said capsule wall, wherein when said capsule wall of one of said micro-capsules is cracked, said adhesive is released from said micro-capsule for flowing to a fracture surface of said concrete structure so as to repair said fracture surface thereof.
A method for fabricating a self-repairing concrete comprising the steps of:
- (1) weighing water, adding in an amount of carbamide resin polymer micro-capsules, then stirring until said micro-capsules are fully dispersed into said water, wherein each of said micro-capsules has a diameter size of 10-500 microns and comprises a capsule wall and an adhesive received in said capsule wall, wherein a mass ratio of said capsule wall and said adhesive is 100:40-80, wherein said capsule wall of said micro-capsule is made of carbamide resin polymer and has a thickness of 1-10 microns, wherein a mass ratio of said capsule wall and said adhesive is 100:40-80, wherein said capsule wall of said micro-capsule is made of carbamide resin polymer and has a thickness of 1-10 microns, wherein said adhesive is a single component adhesive selected from the group consisting of single-component carbamide adhesive, silicone anaerobic adhesives, acrylic adhesives and neoprene adhesives, and multi-component epoxy adhesive;
- (2) adding cement into said above mixture;
- (3) stirring said mixture with cement with a mixing speed in an increasing manner in order to form a concrete slurry;
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- (4) gradually adding said concrete slurry, each time at 1/3 of total dose, into a container and removing bubbles by vibration until all said concrete slurry being added to fill in said container.
A method for fabricating a self-repairing concrete comprising the steps of:
- (1) weighing water, adding in an amount of carbamide resin polymer micro-capsules into said water, then stirring until said micro-capsules are fully dispersed into said water, wherein each of said micro-capsules has a diameter size of 10-500 microns and comprises a capsule wall and an adhesive received in said capsule wall, wherein a mass ratio of said capsule wall and said adhesive is 100:40-80,wherein said capsule wall of said micro-capsule is made of carbamide resin polymer and has a thickness of 1-10 microns, wherein a mass ratio of said capsule wall and said adhesive is 100:40-80, wherein said capsule wall of said micro-capsule is made of carbamide resin polymer and has a thickness of 1-10 microns, wherein said adhesive is a single component adhesive selected from the group consisting of single-component carbamide adhesive, silicone anaerobic adhesives, acrylic adhesives and neoprene adhesives, and multi-component epoxy adhesive;
- (2) adding cement into said above mixture;
- (3) stirring said mixture with cement with a mixing speed in an increasing manner in order to form a concrete slurry;
- (4) removing bubbles in said concrete slurry and forming said concrete slurry into work pieces in molds;
- (5) putting the above mixture aside for 1-2 hours, scrapping excessive of said concrete slurry in said molds, and then placing said work pieces for another 21-26 hours;
- (6) removing said work pieces from said molds and placing said work pieces in a concrete conservation container for 25-31 days to form said self-repairing concrete.
Dependencies are inferred from the claim text.