Method for recovering and reinforcing concrete aggregate
A concrete aggregate and concrete technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. It can reduce the crushing value of the aggregate, reduce the water absorption rate of the aggregate, and reduce the porosity.
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Embodiment 1
[0016] Pass the waste concrete discharged from the cleaning mixer truck of the concrete mixing plant through an iron sieve with a hole diameter of 10mm, and after the coarse aggregate is screened out, the waste concrete is concentrated in the sedimentation tank for sedimentation, and the clear water is discharged into the clear water tank.
[0017] Use a water-absorbing device or water-absorbing material to absorb the excess water in the waste concrete, and then add 0.5wt% of the waste concrete to the finely ground quicklime powder and mix evenly as needed, and use the principle of a large amount of water required for the hydration of the quicklime to further absorb the water in the concrete For excess water, the amount of quicklime is added so that there is no excess free water in the concrete aggregate, and recycled aggregate is obtained.
[0018] Calcium hydroxide solution or calcium salt plus calcium treatment: Take recycled fine aggregate prepared from construction waste a...
Embodiment 2
[0022] Pass the waste concrete discharged from the cleaning mixer truck of the concrete mixing plant through an iron sieve with a hole diameter of 10mm, and after the coarse aggregate is screened out, the waste concrete is concentrated in the sedimentation tank for sedimentation, and the clear water is discharged into the clear water tank.
[0023] Use a water-absorbing device or water-absorbing material to absorb the excess water in the waste concrete, and then add 0.5wt% of the waste concrete to the finely ground quicklime powder and mix evenly as needed, and use the principle of a large amount of water required for the hydration of the quicklime to further absorb the water in the concrete For excess water, the amount of quicklime is added so that there is no excess free water in the concrete aggregate, and recycled aggregate is obtained.
[0024] Calcium hydroxide solution or calcium salt plus calcium treatment: Take recycled fine aggregate prepared from construction waste a...
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