Preparation method of light flame-retardant ecological island roadbed material

A roadbed material, flame-retardant technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of tediousness, design, and complex composition of foam lightweight soil, and achieve the effect of simple preparation process and ensuring flame-retardant performance.

Inactive Publication Date: 2021-02-02
TIANJIN UNIV MARINE TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of foam lightweight soil is complex, the ratio of various fillers and the design of particle gradation are cumbersome, and in order to achieve a good flame retardant effect, it is usually necessary to add a flame retardant as an additional filler

Method used

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  • Preparation method of light flame-retardant ecological island roadbed material

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Effect test

Embodiment 1

[0015] A method for preparing a lightweight flame-retardant ecological sea-island subgrade material, the preparation process comprising the following steps:

[0016] (1) Dissolve polycrystalline mullite fibers in water and shear them with a fiber grinder. The mass ratio of fibers to water is 1:30, and the shearing time is 4 minutes. The length is 600 μm and the aspect ratio is 60:1. Chopped mullite fiber;

[0017] (2) Add 0.6wt% polyacrylamide powder (surfactant) to the slurry obtained in step (1), and disperse for 3 minutes at a speed of 1500r / min;

[0018] (3) Remove the slurry obtained in step (2) from the mixer, pour it into a mold, and naturally settle and form it under the action of gravity;

[0019] (4) Demould the green body obtained after molding in step (3), and place it in an air-blast drying oven at 80°C for 4 hours to obtain a lightweight porous fiber-based composite material.

Embodiment 2

[0021] A method for preparing a lightweight flame-retardant ecological sea-island subgrade material, the preparation process comprising the following steps:

[0022] (1) Dissolve polycrystalline mullite fibers in water and shear them with a fiber pulverizer. The mass ratio of fibers to water is 1:50, and the shearing time is 8 minutes. The length is 400 μm and the aspect ratio is 40:1. Chopped mullite fiber;

[0023] (2) Add 0.4wt% polyacrylamide powder (surfactant) to the slurry obtained in step (1), and disperse at a speed of 1000r / min for 1min;

[0024] (3) Remove the slurry obtained in step (2) from the mixer, pour it into a mold, and naturally settle and form it under the action of gravity;

[0025] (4) Demould the green body obtained in step (3), and place it in a blast drying oven at 100°C for 2 hours to obtain a lightweight porous fiber-based composite material.

Embodiment 3

[0027] A method for preparing a lightweight flame-retardant ecological sea-island subgrade material, the preparation process comprising the following steps:

[0028] (1) Dissolve polycrystalline mullite fibers in water and shear them with a fiber pulverizer. The mass ratio of fibers to water is 1:40, and the shearing time is 6 minutes to obtain a fiber with a length of 500 μm and an aspect ratio of 50:1 chopped mullite fiber;

[0029] (2) Add 0.5wt% polyacrylamide powder (surfactant) to the slurry obtained in step (1), and disperse for 2 minutes at a speed of 1250r / min;

[0030] (3) Remove the slurry obtained in step (2) from the mixer, pour it into a mold, and naturally settle and form it under the action of gravity;

[0031] (4) Demould the green body obtained in step (3), and place it in a blast drying oven at 90°C for 3 hours to obtain a lightweight porous fiber-based composite material.

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Abstract

The invention relates to a preparation method of a light flame-retardant ecological island roadbed material. The preparation method comprises the following steps: selecting temperature-resistant and corrosion-resistant polycrystalline mullite fiber as a matrix, uniformly stirring by using a mechanical stirrer, and uniformly dispersing the fiber in water under the action of a surfactant polyacrylamide to obtain slurry with favorable flowability. After the slurry is poured into a mold and naturally molded, and then dried to obtain a light porous fiber-based composite material, and the obtained fiber product has excellent flame retardancy and corrosion resistance. The invention provides a potential novel roadbed material for construction of artificial ecological islands, and the possibility of growing vegetation on the material is proved through soilless culture experiments.

Description

technical field [0001] The invention belongs to the field of artificial ecological sea island construction, and mainly relates to a preparation method of a light flame-retardant ecological sea island subgrade material. Background technique [0002] Artificial ecological islands are unnaturally formed islands, a type of land reclamation, and one of the ways to use ocean space. They have great potential in solving problems such as coastal city congestion, traffic and air pollution. New artificial ecological islands have great potential. It has a long history, but it is also an emerging marine engineering in recent decades. [0003] On October 23, 2018, the Hong Kong-Zhuhai-Macao Bridge, which took nearly ten years to build, was officially opened in Zhuhai, Guangdong. After the official opening, it was called one of the "Seven Wonders of the Modern World" by The Guardian. All the ports of the Hong Kong-Zhuhai-Macao Bridge are inseparable from the construction of artificial isl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4209D04H1/70
CPCD04H1/4209D04H1/70
Inventor 刘家臣朱文军
Owner TIANJIN UNIV MARINE TECH RES INST
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