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Lightweight aggregate based on surface modification, preparation method of lightweight aggregate and lightweight concrete

A technology of surface modification and lightweight aggregate, which is applied in the field of lightweight concrete, can solve the problems of EPS concrete deficiency, retention of EPS concrete mix ratio design, etc., to increase hydrophilic performance, improve living comfort, and reduce building energy consumption Effect

Inactive Publication Date: 2021-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic and foreign R&D personnel have done a lot of research on EPS concrete, but most of them are still mainly in the design of EPS concrete mix ratio, while the research on the cementitious material matrix of EPS concrete is relatively lacking, and further research is needed. Improve the relevant basic theory and application technology

Method used

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  • Lightweight aggregate based on surface modification, preparation method of lightweight aggregate and lightweight concrete
  • Lightweight aggregate based on surface modification, preparation method of lightweight aggregate and lightweight concrete
  • Lightweight aggregate based on surface modification, preparation method of lightweight aggregate and lightweight concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Providing a lightweight assembly based on surface-modified, including the following steps:

[0039] 1) 15 parts of nano silica, 1000 parts of ordinary silicate cement and 3 parts of the water reducer, and stirred well in the mixer, and then add a standard consistency amount under room temperature under room temperature conditions, and continued to stir Evenly obtained modified light collector shell slurry material;

[0040] 2) Soak the EPS foam particles in tap water, and the wetting treatment 1 h reaches the saturated water-absorbent state, then placed in a sugar coating, then the modified light collector shell slurry material obtained in the EPS foam particles is discharged until the surface of the EPS foam particles The thickness is 2 mm, then the spherical blank is obtained by the causal process, and in the process of the cooker in the cooker, the surface of the blank is removed by hot air, resulting in a spherical blank of the surface, and the particles, and then at th...

Embodiment 2

[0043] Providing a lightweight assembly based on surface-modified, including the following steps:

[0044] 1) 30 parts of the nanosilica, 1000 parts of ordinary portland cement and 5 parts of water reducer, placed stir mixer, and then follow the normal consistency aqueous gel was added at room temperature over 0.4, stirring was continued until to obtain a uniform paste-modified shell lightweight aggregate material;

[0045] 2) The EPS foam particles immersed in tap water, wetting treatment After 1h saturated water absorption state is placed dragee pan, and then Step 1) of the modified housing of lightweight aggregate slurry material is sprayed until the surface of the particles in the EPS foam wrapping layer a thickness of 2mm, then through the process to obtain a spherical ball into a blank, and the balling process to a kettle of hot air on to remove surface moisture blank to give the surface a porous, spherical particles of uniform billet, and then at a temperature of 20 ± 3 ℃, ...

Embodiment 3

[0048] Providing a lightweight assembly based on surface-modified, including the following steps:

[0049] 1) The nano silica 15 parts, 1000 parts of ordinary portland cement and 5 parts of water reducer, placed stir mixer, and then follow the water-cement ratio was added 0.4 normal consistency at room temperature, stirring was continued until to obtain a uniform paste-modified shell lightweight aggregate material;

[0050] 2) The EPS foam particles immersed in tap water, wetting treatment After 1h saturated water absorption state is placed dragee pan, and then Step 1) of the modified housing of lightweight aggregate slurry material is sprayed until the surface of the particles in the EPS foam wrapping layer a thickness of 2mm, then through the process to obtain a spherical ball into a blank, and the balling process to a kettle of hot air on to remove surface moisture blank to give the surface a porous, spherical particles of uniform billet, and then at a temperature of 20 ± 3 ℃, ...

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Abstract

The invention discloses a lightweight aggregate based on surface modification, a preparation method of the lightweight aggregate and lightweight concrete. The lightweight aggregate based on surface modification comprises EPS foam particles and a coating layer covering the surfaces of the EPS foam particles, wherein the coating layer is prepared from the following raw materials in parts by mass: 1000 parts of ordinary Portland cement, 15-30 parts of nano silicon dioxide and 3-5 parts of a polycarboxylate water reducing agent, wherein the water-binder ratio is 0.35-0.4. The preparation comprises the steps: mixing the raw materials of the coating layer, spraying the mixture on the EPS foam particles subjected to water soaking treatment, granulating, removing moisture in the granulating process, and finally curing to obtain the lightweight aggregate with porous surface and uniform particles. The preparation is simple, and the operation is convenient; and the obtained lightweight aggregate increases the hydrophilic performance of the EPS foam particles, avoids layering of EPS, is high in strength and low in stacking density, has the characteristics of light weight, energy conservation, heat preservation, sound insulation, economy, environmental protection and the like when being used in the lightweight concrete, and is easy to popularize and apply.

Description

Technical field [0001] The present invention belongs to the technical field of building materials, and more particularly to surface modified lightweight aggregates and preparation methods and a lightweight concrete. Background technique [0002] According to statistics, there are hundreds of thousands of tons of privic polystyrene foam (EPS) every year in my country, which is used in commercial packaging, disposable cutlery or insulation materials, and partially consuming, it has been discarded, causing serious environmental pollution. Introducing waste EPS resource recovery into concrete, not only can effectively solve "white pollution" problem, but also achieve concrete light insulation, sound insulation noise reduction, seismic absorbing, reaching building materials function composite, improve indoor comfort and reducing architecture The purpose of energy consumption is also a hot spot in the field of building energy-saving fields, with great market competitive advantages and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B16/08C04B28/04C04B111/40
CPCC04B20/1077C04B16/08C04B20/1066C04B20/1029C04B28/04C04B2201/20C04B2201/50C04B2111/40
Inventor 戴绍斌尚丽诗杨航
Owner WUHAN UNIV OF TECH
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