Hollow recycled concrete component prepared by utilizing waste fiber and preparation method for hollow recycled concrete component
A technology for recycled concrete and waste concrete, which is used in manufacturing tools, ceramic molding machines, etc., can solve the problems of high water absorption of recycled concrete and low tensile strength of recycled concrete, and achieves increased ultimate elongation, compact structure, and reduced interface. The effect of porosity
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Embodiment 1
[0030] In this embodiment, a hollow regenerated concrete member prepared by using waste fibers includes concrete and a steel pipe for containing the concrete. The concrete is 100 parts of waste concrete, 40 parts of 42.5 grade ordinary Portland cement, and 40 parts of fly ash. , 3 parts by weight of modified waste plant fibers and 50 parts by weight of water;
[0031] The recycled concrete is poured into the steel pipe and centrifuged to form a columnar hollow attached to the inner wall of the steel pipe, and then the recycled concrete is reacted with carbon dioxide to form a hollow recycled concrete member;
[0032] The preparation method of the modified waste plant fiber is as follows: firstly, the waste plant fiber is washed and dedusted, dried and crushed into short fibers with a diameter of 3mm, soaked in 1mol / L sodium hydroxide solution, and the soaking temperature is at 60°C, soak for 6 hours, wash with water, dry for later use, then prepare γ-aminopropyltriethoxysilane...
Embodiment 2
[0041] In this embodiment, a hollow regenerated concrete member prepared by using waste fibers includes concrete and a steel pipe for containing the concrete. The concrete is 100 parts of waste concrete, 30 parts of 42.5 grade ordinary Portland cement, and 30 parts of fly ash. , 2 parts of modified waste plant fibers and 30 parts of water in parts by weight of recycled concrete
[0042] The recycled concrete is poured into the steel pipe and centrifuged to form a columnar hollow attached to the inner wall of the steel pipe, and then the recycled concrete is reacted with carbon dioxide to form a hollow recycled concrete member;
[0043] The preparation method of the modified waste plant fiber is as follows: firstly, the waste plant fiber is washed and dust-removed, dried and crushed into short fibers with a diameter of 2 mm, soaked in 0.5 mol / L sodium hydroxide solution, and soaked The temperature is 40°C, the soaking time is 8 hours, washed with water, dried for later use, and...
Embodiment 3
[0052] In this embodiment, a hollow regenerated concrete member prepared by using waste fibers includes concrete, and also includes a columnar matrix for containing the concrete. The concrete is 100 parts of waste concrete, 50 parts of 42.5 grade ordinary Portland cement, and 50 parts of pulverized coal. Ash, 5 parts of modified waste plant fibers and 60 parts of recycled concrete prepared by weight of water, also including steel pipes to accommodate the concrete;
[0053] The recycled concrete is poured into the steel pipe and centrifuged to form a columnar hollow attached to the inner wall of the steel pipe, and then the recycled concrete is reacted with carbon dioxide to form a hollow recycled concrete member;
[0054] The preparation method of the modified waste plant fiber is as follows: firstly, the waste plant fiber is washed and dedusted, dried and crushed into short fibers with a diameter of 5mm, soaked in 2mol / L sodium hydroxide solution, the temperature of the soakin...
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