Preparation method of regenerated concrete
A technology for recycled concrete and recycled aggregates, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of reducing recycled concrete aggregate, changing the particle size and gradation of recycled aggregate, fine It can solve the problems of exceeding the fineness modulus of the material, and achieve the effect of solving the problem of recycling and reuse, reducing the crushing value of the aggregate, and reducing the water absorption rate of the aggregate.
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Embodiment 1
[0020] Prepare microbial culture medium, adjust the pH value to 7-9 by dropping NaOH solution, sterilize and cool to room temperature, inoculate Bacillus sarcina, add urea solution at the same time, shake culture at 25°C; medium consists of peptone 4g / L. Beef extract 2g / L and deionized water, or composed of soybean peptone 5g / L, casein peptone 15g / L and deionized water; the sterilization conditions are: sterilization at 125°C for 25min ; Bacteria were shaken for 15 hours, and the bacterial cell concentration was 223cell / mL.
[0021] Add regenerated aggregates to the bacterial culture solution and continue shaking culture; the regenerated aggregates are obtained after passing through a 0.075mm standard sieve and washed with water, the particle size is 0.075mm-4.75mm, and the ratio of the bacterial culture solution is 150g: 250mL; regenerated fine bone The material is added to the bacterial solution prior to the mixed solution of calcium source urea, and the oscillation is main...
Embodiment 2
[0028] Prepare microbial culture medium, adjust the pH value to 7-9 by adding NaOH solution dropwise, sterilize and cool to room temperature, inoculate Bacillus sarcina, add urea solution at the same time, shake culture at 37°C; medium consists of peptone 6g / L. Beef extract 4g / L and deionized water, or composed of soybean peptone 5g / L, casein peptone 15g / L and deionized water; the sterilization conditions are: sterilize at 125°C for 25min ; The bacteria were shaken for 20 hours, and the bacterial cell concentration was 625cell / mL.
[0029] Add regenerated aggregates to the bacterial culture solution and continue shaking culture; the regenerated aggregates are obtained after passing through a 0.075mm standard sieve and washing with water, the particle size is 0.075mm-4.75mm, and the ratio of the bacterial culture solution is 150g: 250mL-300g: 250mL ; The regenerated fine aggregate was added to the bacterial solution prior to the mixed solution of calcium source urea, and the o...
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