Preparation method of high-strength carbonized artificial aggregate

An artificial aggregate and high-strength technology, applied in the field of concrete, can solve the problems of volume expansion, poor volume stability, and the inability to directly use concrete, etc., and achieve the effects of reducing carbon dioxide concentration, reducing poor stability, and reducing use and mining

Active Publication Date: 2020-03-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel slag is hard and contains CaO, SiO 2 Oxides with potential volcanic ash reactivity, but the content of f-CaO and f-MgO is relatively high, because the hydration reaction of f-CaO and f-MgO in the

Method used

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  • Preparation method of high-strength carbonized artificial aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the high-strength artificial aggregate of the present embodiment may further comprise the steps:

[0033] 1) Preparation of raw materials. Collect the discarded fresh concrete and the residual concrete in the mixer truck and after the production test from the mixing station, and filter them to test their moisture content: first move the quantitative filter paper into the oven and dry it at 105°C for half an hour, then take it out and place it in the oven. Cool to room temperature in a desiccator and weigh it. Repeat drying, cooling, and weighing until the weight difference between the two weighings is ≤0.2 mg, and record the weight of the quantitative filter paper at this time as W 1 . Place the filter paper of constant weight in the tray of the balance. Take about 20g of the wet waste residue after pressure filtration and place it on the filter paper. After the balance reading is stable, record the data as W 2 , then the weight of the wet ...

Embodiment 2

[0039] The preparation method of the high-strength artificial aggregate of the present embodiment may further comprise the steps:

[0040] 1) Preparation of raw materials. Collect the discarded fresh concrete and the residual concrete in the mixer truck and after the production test from the mixing station, and filter them to test their moisture content: first move the quantitative filter paper into the oven and dry it at 105°C for half an hour, then take it out and place it in the oven. Cool to room temperature in a desiccator and weigh it. Repeat drying, cooling, and weighing until the weight difference between the two weighings is ≤0.2 mg, and record the weight of the quantitative filter paper at this time as W 1 . Place the filter paper of constant weight in the tray of the balance. Take about 20g of the wet waste residue after pressure filtration and place it on the filter paper. After the balance reading is stable, record the data as W 2 , then the weight of the wet ...

Embodiment 3

[0046] The preparation method of the high-strength artificial aggregate of the present embodiment may further comprise the steps:

[0047] 1) Preparation of raw materials. Collect the discarded fresh concrete and the residual concrete in the mixer truck and after the production test from the mixing station, and filter them to test their moisture content: first move the quantitative filter paper into the oven and dry it at 105°C for half an hour, then take it out and place it in the oven. Cool to room temperature in a desiccator and weigh it. Repeat drying, cooling, and weighing until the weight difference between the two weighings is ≤0.2 mg, and record the weight of the quantitative filter paper at this time as W 1 . Place the filter paper of constant weight in the tray of the balance. Take about 20g of the wet waste residue after pressure filtration and place it on the filter paper. After the balance reading is stable, record the data as W 2 , then the weight of the wet ...

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Abstract

The invention discloses a preparation method of a high-strength carbonized artificial aggregate, and the method comprises the following steps: collecting residual concrete, carrying out filter pressing to obtain wet waste residues, crushing, drying and grinding steel slag to obtain steel slag powder, and sufficiently stirring and mixing the wet waste residues and the steel slag powder to obtain amixture; then putting the mixture into a disc granulator for granulation to obtain an artificial coarse aggregate green body; and maintaining the obtained artificial coarse aggregate green body, and carbonizing to obtain the high-strength carbonized artificial aggregate. The high-strength carbonized artificial aggregate prepared by the invention is high in single-particle strength and low in waterabsorption rate; the high-strength aggregate completely meets various performance requirements of a high-strength aggregate, can replace a natural aggregate to be used as a raw material of concrete,greatly reduces the use and exploitation of a natural gravel aggregate, can effectively protect mines and save natural resources, provides a sustainable development production method for the concreteconstruction industry, and has important significance.

Description

technical field [0001] The invention belongs to the technical field of concrete and relates to a preparation method of high-strength artificial aggregate. Background technique [0002] Concrete is made from cement, aggregate, mixing water, mineral admixtures and some admixtures. Among them, aggregate (mainly including some sand and stone) accounts for about 60% to 70% of the total weight of concrete. With the over-exploitation of mines, natural sand and gravel aggregate resources are increasingly scarce. It is of great significance to find artificial aggregates that can replace natural sandstone aggregates. [0003] Mixing plant waste is a bulk solid waste generated during the operation and maintenance of the ready-mixed concrete (mixing plant) industry. For every cubic meter of concrete produced, an average of 0.04 tons of waste residue from the mixing plant will be generated. If these waste residues are not disposed of properly, it will not only waste a lot of manpower...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B18/30C04B40/02
CPCC04B18/30C04B28/10C04B2201/20C04B2201/50C04B18/16C04B18/142C04B40/0231Y02W30/91
Inventor 刘云鹏杨超胡曙光王发洲朱明刘志超胡传林
Owner WUHAN UNIV OF TECH
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