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Cement-based modified composite material and preparation method thereof

A composite material and cement-based technology, applied in the field of concrete construction, can solve the problems of excessive heavy metal precipitation and performance degradation, and achieve the effects of improving the performance of molecular structure, reducing shrinkage and excellent performance indicators.

Inactive Publication Date: 2021-03-16
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a cement-based modified composite material and its preparation method, aiming to solve the problems of excessive precipitation of heavy metals and performance decline in cement-based composite materials containing domestic waste incineration fly ash in the prior art

Method used

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  • Cement-based modified composite material and preparation method thereof
  • Cement-based modified composite material and preparation method thereof
  • Cement-based modified composite material and preparation method thereof

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preparation example Construction

[0052] The second aspect of the embodiment of the present application provides a method for preparing a cement-based modified composite material, comprising the following steps:

[0053] S01. Performing a first mixing treatment on Portland cement, slag, incineration fly ash, water-absorbing polymer and polycarboxylate superplasticizer to obtain a first mixture;

[0054] S02. performing a second mixing process on the first mixture and water to obtain a second mixture;

[0055] S03. The second mixture is subjected to a standing treatment, and then a third mixing treatment is performed to obtain a cement-based modified composite material.

[0056] The preparation method of the cement-based modified composite material provided in the second aspect of the present application, the preparation method provides the components of the cement-based modified composite material, mixes the solid components, and then adds water for mixing to obtain the cement-based modified composite material...

Embodiment 1

[0063] Cement-based modified composite material and preparation method thereof

[0064] Cement-based Modified Composite Materials

[0065] The cement-based modified composite material comprises the following components in the following parts by weight:

[0066]

[0067] Among them, the grade of Portland cement is selected from 42.5R;

[0068] The particle size of incineration fly ash is selected from 1 to 110 microns, taking the mass of incineration fly ash as 100%, the mass percentage of incineration fly ash with a particle size of 3 microns or less is 22 wt%, and the particle size is 3 to 32 microns The mass percentage of incineration fly ash is 58 wt%, the mass percentage of incineration fly ash with a particle size of 32 to 65 microns is 15 wt%, and the mass percentage of incineration fly ash with a particle size of 65 microns or more is 5wt%;

[0069] Polycarboxylate water reducer selected from SK-67;

[0070] The water-absorbing polymer is selected from crossli...

Embodiment 2

[0077] Cement-based modified composite material and preparation method thereof

[0078] Cement-based Modified Composite Materials

[0079] The cement-based modified composite material comprises the following components in the following parts by weight:

[0080]

[0081] Among them, the grade of Portland cement is selected from 42.5R;

[0082]The particle size of incineration fly ash is selected from 1 to 110 microns, taking the mass of incineration fly ash as 100%, the mass percentage of incineration fly ash with a particle size of 3 microns or less is 22 wt%, and the particle size is 3 to 32 microns The mass percentage of incineration fly ash is 58 wt%, the mass percentage of incineration fly ash with a particle size of 32 to 65 microns is 15 wt%, and the mass percentage of incineration fly ash with a particle size of 65 microns or more is 5wt%;

[0083] Polycarboxylate water reducer selected from SK-67;

[0084] The water-absorbing polymer is selected from crosslin...

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Abstract

The invention provides a cement-based modified composite material. The cement-based modified composite material comprises the following components in parts by weight: 300-550 parts of Portland cement;200-400 parts of slag; 50-500 parts of incineration fly ash; 1-7 parts of a polycarboxylate superplasticizer; 0.5-1 part of a water-absorbing polymer; and 192-580 parts of water; according to the cement-based modified composite material, Portland cement, slag and incineration fly ash are used as main components and cooperate with a water-absorbing polymer and a polycarboxylate superplasticizer, so that heavy metal ions are effectively absorbed into the water-absorbing polymer and retained in the water-absorbing polymer, the curing effect is achieved, and meanwhile, the leaching process of theheavy metal ions is slowed down; the precipitation concentration of heavy metals in the composite material is greatly reduced by the water-absorbing polymer, and the performance of the molecular structure of the cement-based modified composite material is improved, so that the cement-based modified composite material reaches the use standard of building materials.

Description

technical field [0001] The application belongs to the technical field of concrete construction, and in particular relates to a cement-based modified composite material and a preparation method thereof. Background technique [0002] In recent years, with the advancement of urbanization, the annual recycling volume of domestic waste has reached tens of millions of tons. Taking 2013 as an example, it reached 41.499 million tons. Leaded CRT glass containing heavy metals accounts for 85% of waste electronic products. [0003] Among them, in order to reduce the landfill volume, reduce the damage to the natural environment, and improve the efficiency of domestic waste treatment, high-temperature 1000-1500 ° C incineration technology is widely used in domestic waste treatment. This technology can reduce the volume of domestic waste by up to 90%. Due to the large base, there is still a large amount of residual ash after incineration. Among them, in the municipal solid waste inciner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2103/0051C04B2111/00017C04B2201/50C04B18/141C04B18/08C04B2103/302C04B24/2652
Inventor 龙武剑郑淑仪彭俊凯古宇存李金林邢锋董必钦
Owner SHENZHEN UNIV
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