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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

Inactive Publication Date: 2013-01-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent has innovations in low alkalinity, it does not involve the utilization of waste concrete and seawater wet-drained fly ash

Method used

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  • Method for preparing ultralow cement artificial fishing reef concrete by waste concrete

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Experimental program
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Effect test

Embodiment 1

[0028] Step 1. Use cascade grinding, first dry the seawater wet ash to a moisture content of ≤1%, and then grind it until the specific surface area is 604m 2 / kg, adding a specific surface area of ​​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 to obtain 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. Crushing, self-grinding and sieving the waste concrete to obtain coarse aggregate with a particle size in the range of 5-31.5 mm and fine aggregate with a particle size in the range of 0.16-5 mm.

[0030] Step 3. The specific surface area obtained in step 1 is 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size within the range of 5-31.5mm and the recycled fine aggregate with a particle size within the range of 0.16-...

Embodiment 2

[0033] Step 1. Use cascade grinding, first dry the seawater wet ash to a moisture content of ≤1%, and then grind it until the specific surface area is 604m 2 / kg, adding a specific surface area of ​​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 to obtain 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. Crushing, self-grinding and sieving the waste concrete to obtain coarse aggregate with a particle size in the range of 5-31.5 mm and fine aggregate with a particle size in the range of 0.16-5 mm.

[0035] Step 3. The specific surface area obtained in step 1 is 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size within the range of 5-31.5mm and the recycled fine aggregate with a particle size within the range of 0.16-...

Embodiment 3

[0038] Step 1. Use cascade grinding, first dry the seawater wet ash to a moisture content of ≤1%, and then grind it until the specific surface area is 604m 2 / kg, adding a specific surface area of ​​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 to obtain the gelled material. Among them, slag powder, seawater wet discharge fly ash, cement clinker, and desulfurized gypsum are in a mass ratio of 40%: 40%: 10%: 10%.

[0039] Step 2. Crushing, self-grinding and sieving the waste concrete to obtain coarse aggregate with a particle size in the range of 5-31.5 mm and fine aggregate with a particle size in the range of 0.16-5 mm.

[0040] Step 3. The specific surface area obtained in step 1 is 408 m 2 / kg cementitious material and the recycled coarse aggregate with a particle size within the range of 5-31.5mm and the recycled fine aggregate with a particle size within the range of ...

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Abstract

The invention relates to a method for preparing ultralow cement artificial fishing reef concrete and belongs to the field of comprehensive utilization of solid waste. The method for preparing ultralow cement artificial finishing reef concrete is characterized by including grinding dried seawater wet discharge ash until the specific surface area is 500-700m<2> / kg, adding slag powder of the specific surface area of 350-410m<2> / kg, mixedly grinding clinker and desulfurized gypsum until the specific surface area is 450-550m<2> / kg and obtaining binding materials; smashing, autogenously grinding and screening the waste concrete to obtain regenerable crude aggregate and regenerable fine aggregate; according to doping quantity proportion per cubic meter of 300-350kg / m<3> of the binding materials, 800-1300kg / m<3> of the regenerable crude aggregate, 500-800kg / m<3> of the regenerable fine aggregate and 1-3.5kg / m<3> of efficient water reducer and water binder ratio of 0.35-0.5, preparing low-alkalinity concrete fishing reef. By the method for preparing ultralow cement artificial fishing reef concrete, solid concrete is utilized as main raw materials to prepare the ultralow cement artificial fishing reef concrete, preparation cost of the fishing reef is evidently reduced; and further, since the pH (potential of hydrogen) value of prepared fishing reef concrete solution is similar to that of sea water, the ecological environment of aquatic lives around the fishing reef is thoroughly improved.

Description

technical field [0001] The invention relates to the technical field of waste concrete and seawater wet-drained fly ash, and in particular provides a method for preparing ultra-low cement artificial fish reef concrete from waste concrete. Background technique [0002] In recent years, the decline of fishery resources has become a worldwide problem. Countries all over the world have generally recognized the threat of the decline of fishery resources and have stepped up efforts to protect fishery resources. Japan first put forward the idea of ​​marine ranching. In the past 20 years, many coastal countries have put in artificial reefs to build marine ranching. The use of artificial reef materials with good marine ecological compatibility and scientific reef and reef design plays an important role in protecting the marine ecological environment, purifying seawater and multiplying marine biological resources. [0003] Japan invests 60 billion yen in fish reef construction every y...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/16
CPCY02W30/91
Inventor 倪文伏程红王中杰吴辉范敦城李瑾
Owner UNIV OF SCI & TECH BEIJING
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