Method for preparing functional permeable material from multi-source solid waste

A water-permeable material and functional technology, applied in the fields of concrete, artificial stone or ceramic products, and mortar, can solve the problems of high cost, damage to the environment, and low strength, and achieve the effects of increasing strength and hardness, improving pore structure, and increasing strength

Pending Publication Date: 2022-02-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some problems in the above research, for example: the unfired ceramsite prepared by mud base uses a large amount of cementitious materials, the cost is high, and the dissolution of organic matter in the sludge is not considered, and the dissolution of organic matter will affect the strength of unfired ceramsite
The resource utilization of iron tailings uses a large amount of cementitious materia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] A method of utilizing multi-source solid waste to prepare functional water-permeable material (the following consumptions are mass parts), the concrete steps are as follows:

[0053] 1) 1500 parts of sludge were pretreated with 70 parts of potassium polyacrylate and 60 parts of water-based epoxy resin, and mixed uniformly to obtain high-activity sludge;

[0054] 2) 900 parts of iron tailings are ball-milled to a particle size of ≤48 μm, and then mixed with 70 parts of sodium hydroxide solution (1 mol / L) and 120 parts of water glass to prepare a strong alkali solution to obtain high-activity iron tailings powder. ;

[0055] 3) 200 parts of coal gangue were heated to 700°C at a heating rate of 10°C / min in a muffle furnace, kept for 2 hours for calcination, then cooled naturally, and then ball-milled into coal gangue powder with a fineness of ≤17.05 μm;

[0056] 4) adding the above-mentioned high-activity sludge, high-activity iron tailing powder, coal...

Example Embodiment

[0058] Example 2

[0059] A method of utilizing multi-source solid waste to prepare functional water-permeable material (the following consumptions are mass parts), the concrete steps are as follows:

[0060] 1) utilize 70 parts of potassium polyacrylates and 60 parts of water-based epoxy resins to carry out mixing pretreatment to 1500 parts of silts to obtain highly active silts;

[0061] 2) 900 parts of iron tailings are ball-milled to a particle size of ≤48 μm, and then mixed with 70 parts of sodium hydroxide solution (1 mol / L) and 120 parts of water glass to prepare a strong alkali solution to obtain high-activity iron tailings powder. ;

[0062] 3) 190 parts of coal gangue were heated to 700°C at a heating rate of 10°C / min at room temperature, kept for 2 hours for calcination, then cooled naturally, and then ball-milled into coal gangue powder with a fineness of ≤17.05 μm;

[0063] 4) adding the above-mentioned high-activity sludge, high-activity iron tailing powder, co...

Example Embodiment

[0065] Example 3

[0066] A method of utilizing multi-source solid waste to prepare functional water-permeable material (the following consumptions are mass parts), the concrete steps are as follows:

[0067] 1) utilize 70 parts of potassium polyacrylates and 60 parts of water-based epoxy resins to carry out mixing pretreatment to 1500 parts of silts to obtain highly active silts;

[0068] 2) 900 parts of iron tailings are ball-milled to a particle size of ≤48 μm, and then mixed with 70 parts of sodium hydroxide solution (1 mol / L) and 120 parts of water glass to prepare a strong alkali solution to obtain high-activity iron tailings powder. ;

[0069] 3) 180 parts of coal gangue were heated to 700°C at a heating rate of 10°C / min at room temperature, kept for 2 hours for calcination, then cooled naturally, and then ball-milled into coal gangue powder with a fineness of ≤17.05 μm;

[0070] 4) adding the above-mentioned high-activity sludge, high-activity iron tailing powder, co...

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PUM

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Abstract

The invention relates to a method for preparing a functional permeable material by using multi-source solid waste, which comprises the following specific steps: fully and uniformly stirring high-activity sludge, high-activity iron tailing powder, coal gangue powder, blast furnace slag, gypsum, ammonium bicarbonate and medical stone powder, then preparing into spheres with the particle size of 4.75-9.5 mm by using a pelletizer, and curing to obtain unfired aggregate; adding the unfired aggregate and part of water into a stirrer, uniformly stirring and mixing, then adding the cement, magnesium fluosilicate and sodium silicate, fully stirring, finally adding the water reducing agent, redispersible latex powder and residual water, uniformly mixing, taking out the obtained mixture, compacting, and curing to obtain the functional permeable material. The functional permeable material is prepared from the low-carbon unfired aggregate, the solid waste resource utilization rate is high, the preparation cost is low, the energy consumption in the preparation process is low, the preparation process is simple, and the functional permeable material has great application prospects in sponge city construction.

Description

technical field [0001] The invention belongs to the technical field of porous mortar, concrete, artificial stone or ceramic products, and relates to a method for preparing functional permeable materials by using multi-source solid waste. Background technique [0002] During the development of urbanization in my country, the discharge of waste such as silt and iron tailings is very large. In most areas of my country, silt is usually stored in a centralized manner, and it will be restored after natural evaporation, consolidation and settlement to form the land. secondary pollution. Similarly, the stockpiling of iron tailings not only takes up a lot of land resources, but also destroys the local ecological environment. [0003] The resource utilization of silt and iron tailings to prepare permeable concrete and other materials can be used to build a "sponge city" with natural accumulation, natural infiltration, and natural purification, and solve problems such as rainstorm wat...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00284C04B2201/20C04B2201/50C04B12/04C04B22/126C04B2103/0057C04B2103/302C04B18/0436C04B18/12C04B18/141C04B14/365C04B14/36C04B22/10C04B24/2641C04B24/281Y02W30/91
Inventor 蹇守卫王威振魏博成诚李相国谭洪波吕阳黄健
Owner WUHAN UNIV OF TECH
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