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Method for repairing brick and stone masonries through oyster shells and microorganisms

A technology based on oyster shells and microorganisms, applied in the field of building repairs, can solve problems such as poor repair effects and low strength of repair materials

Active Publication Date: 2017-08-22
广州新城建筑设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a method for repairing masonry by using oyster shells and microorganisms in view of the defects that the strength of the repair material is low and the shrinkage and cracking during the hardening process lead to poor repair effect in the currently commonly used methods for repairing masonry. masonry method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Weigh 1 kg of fresh oyster shells, wash them with deionized water for 3 times, and then grind them with a sand wheel to remove the 1 mm thick impurity layer on the outside of the oyster shells. The shell fragments and water were mixed at a mass ratio of 1:5, then ultrasonically oscillated and impregnated for 3 hours. After the impregnation, the oyster shell fragments were taken out and sprayed with liquid nitrogen to freeze for 3 minutes, then transferred to a mortar for grinding for 20 minutes, and passed through a 200-mesh sieve after grinding. To get oyster shell powder, take 10 pumpkins, use a puncher to dig out a round hole with a radius of 5cm, and then hollow out the pulp inside the pumpkin to get a hollow pumpkin and use it as the center of the circle. Fermentation container, take pig manure and tea leaves and mix them at a mass ratio of 3:1 to obtain a fermentation substrate, then mix the fermentation substrate and biogas liquid at a mass ratio of 1:1, and then ...

example 2

[0019] Weigh 2 kg of fresh oyster shells, wash them with deionized water for 4 times, and then use a sand wheel to grind to remove the 2 mm thick impurity layer on the outside of the oyster shells. Put the polished oyster shells into a jet mill for 35 minutes, and grind the oyster shells The shell fragments and water were mixed at a mass ratio of 1:5, then ultrasonically oscillated and impregnated for 4 hours. After the impregnation, the oyster shell fragments were taken out and sprayed with liquid nitrogen to freeze for 4 minutes, then transferred to a mortar for grinding for 25 minutes, and passed through a 200-mesh sieve after grinding. To get oyster shell powder, take 13 pumpkins, use a puncher to dig out a round hole with a radius of 5cm, and then hollow out the pulp inside the pumpkin to get a hollow pumpkin and use it as the center of the circle. Fermentation container, take pig manure and tea leaves and mix them at a mass ratio of 3:1 to obtain a fermentation substrate,...

example 3

[0021] Weigh 2 kg of fresh oyster shells, wash them with deionized water for 5 times, and then grind them with a sand wheel to remove the 2 mm thick impurity layer on the outside of the oyster shells. The shell fragments and water were mixed at a mass ratio of 1:5, then ultrasonically oscillated and impregnated for 5 hours. After the impregnation, the oyster shell fragments were taken out and sprayed with liquid nitrogen to freeze for 5 minutes, then transferred to a mortar and ground for 30 minutes, and passed through a 200-mesh sieve after grinding. To obtain oyster shell powder, take 15 pumpkins, use a puncher to dig out a round hole with a radius of 5cm, and hollow out the pulp inside the pumpkin to obtain a hollow pumpkin and use it as the center of the circle. Fermentation container, take pig manure and tea leaves and mix them at a mass ratio of 3:1 to obtain a fermentation substrate, then mix the fermentation substrate and biogas liquid at a mass ratio of 1:1, and then inj...

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Abstract

The invention relates to a method for repairing brick and stone masonries through oyster shells and microorganisms and belongs to the technical field of building repair. According to the method, water immerges into cracks of the oyster shells at first and is subjected to liquid nitrogen freezing to form ice crystals, accordingly, the size is enlarged, and the oyster shells burst open; oyster shell powder is obtained by grinding the oyster shells, fermentation liquor with the rich microorganisms is prepared through fermentation, the oyster shell powder, the fermentation liquor and collagen gel are mixed with the collagen gel as a nutrient substance and injected into cracks of the brick and stone masonries, and the microorganisms absorb carbon dioxide and heat generated in the metabolism process of the nutrient substance; and during maintenance, sprayed water, calcium carbonate in the oyster shells and carbon dioxide react to produce soluble calcium bicarbonate which immerges into the cracks of the masonries, the calcium bicarbonate forms dense calcium carbonate crystals again under the action of heat so as to block the cracks of the brick and stone masonries, and thus the purpose that the masonries are repaired is achieved. According to the method, the calcium carbonate crystals generated after repairing are compact in structure, high in intensity and free of shrinkage cracking, the aging resistance of the calcium carbonate crystals is superior to that of organic materials, and the application prospects are broad.

Description

technical field [0001] The invention relates to a method for repairing masonry by using oyster shells and microorganisms, and belongs to the technical field of building repair. Background technique [0002] As a traditional structural form, masonry structure occupies an important position in the field of ancient architecture. The main architectural forms of masonry structures include: military buildings such as city walls and watchtowers, religious buildings such as pagodas and temples, and residential buildings such as palaces and buildings. However, the brittleness of masonry materials determines that the seismic performance of masonry structures is not good, and the strength of ancient masonry mortars is generally not high, and is easily affected by physical weathering, brittleness, alkali, etc. Acid rain and other chemical weathering and biological corrosion have further reduced the bond strength of materials, and it is urgent to adopt certain technological means to str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/02C04B26/02C04B111/72
Inventor 孙祎林晨
Owner 广州新城建筑设计院有限公司
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