Crack self-repairing concrete and preparation and repairing method thereof
A repair method and concrete technology, which is applied in building maintenance, construction, building construction, etc., can solve the problems of slow calcium carbonate deposition rate and long self-repair period of cracks, so as to prevent expansion, improve impermeability performance, and increase deposition rate Effect
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[0022] Step 1: Select Bacillus pasteurii (Sporosarcina pasteurii, ATCC11859) with the function of mineralization and precipitation as the freeze-dried powder of the bacteria. Before use, the bacteria should be activated according to the microbial culture method. The specific process is as follows:
[0023] (1) Culture medium configuration. The content of each component in the medium is as follows: 1 L of ultrapure water, 5 g of peptone, 3 g of beef extract, 0.53 g of sodium carbonate, 0.42 g of sodium bicarbonate, and 18 g of agar powder.
[0024] (2) Sterilize the culture medium and utensils. Place the remaining utensils (glass plates, centrifuge tubes, pipette tips, etc.) and culture medium required for the experiment in a pressure cooker, and sterilize at 121° C. for 20 minutes.
[0025] (3) Invert the plate. Before the culture medium containing agar powder is cooled and solidified, an agar plate for activation of Bacillus is prepared in the ultra-clean bench according to...
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