Method for preparing ultralow cement artificial fishing reef concrete by waste concrete
A technology of waste concrete and artificial fish reef, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems that do not involve the utilization of waste concrete and seawater wet-drained fly ash, and achieve the reduction of preparation Cost, improvement of ecological environment, effect of improving pore structure
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[0027] Example 1
[0028] Step 1. Using step grinding, first dry the seawater wet ash to a moisture content ≤1%, and then grind to a specific surface area of 604m 2 / kg, the added specific surface area is 408m 2 / kg of slag powder, mixed with clinker and desulfurized gypsum dried to a moisture content of ≤1% to a specific surface area of 520m 2 / kg, get the gelled material. Among them, slag powder, seawater wet discharge fly ash, cement clinker, and desulfurized gypsum are 65%: 15%: 10%: 10% on a dry basis.
[0029] Step 2. The waste concrete is crushed, self-milled and sieved to obtain different proportions of coarse aggregates with a particle size in the range of 5 to 31.5 mm and fine aggregates with a particle size in the range of 0.16 to 5 mm.
[0030] Step 3. Set the specific surface area obtained in step 1 to 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size in the range of 5~31.5mm obtained in step 2, and the recycled fine aggregate w...
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[0032] Example 2
[0033] Step 1. Use cascade grinding, first dry the seawater wet ash to a moisture content ≤1%, and then grind to a specific surface area of 604m 2 / kg, the added specific surface area is 408m 2 / kg of slag powder, mixed with clinker and desulfurized gypsum dried to a moisture content of ≤1% to a specific surface area of 520m 2 / kg, get the gelled material. Among them, slag powder, seawater wet discharge fly ash, cement clinker, and desulfurized gypsum are 65%: 15%: 10%: 10% on a dry basis.
[0034] Step 2. The waste concrete is crushed, self-milled and sieved to obtain different proportions of coarse aggregates with a particle size in the range of 5 to 31.5 mm and fine aggregates with a particle size in the range of 0.16 to 5 mm.
[0035] Step 3. Set the specific surface area obtained in step 1 to 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size in the range of 5~31.5mm obtained in step 2, and the recycled fine aggregate ...
Example Embodiment
[0037] Example 3
[0038] Step 1. Use cascade grinding, first dry the seawater wet ash to a moisture content ≤1%, and then grind to a specific surface area of 604m 2 / kg, the added specific surface area is 408 m 2 / kg of slag powder, mixed with clinker and desulfurized gypsum dried to a moisture content of ≤1% to a specific surface area of 507m 2 / kg, get the gelled material. Among them, slag powder, seawater wet discharge fly ash, cement clinker, and desulfurized gypsum are 40%: 40%: 10%: 10% by mass.
[0039] Step 2. The waste concrete is crushed, self-milled and sieved to obtain different proportions of coarse aggregates with a particle size in the range of 5 to 31.5 mm and fine aggregates with a particle size in the range of 0.16 to 5 mm.
[0040] Step 3. Set the specific surface area obtained in step 1 to 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size in the range of 5~31.5mm obtained in step 2, and the recycled fine aggregate with a...
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