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Flame-retardant lignin fiber for roads and preparation method thereof

A lignin fiber, road technology, applied in the direction of roads, roads, buildings, etc., can solve problems such as threatening the safety of tunnels and users, and achieve the effect of reducing flammability and obvious economic and social benefits

Inactive Publication Date: 2010-09-15
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when it is applied in a tunnel, because the asphalt material itself has obvious flammability, and produces a large amount of smoke and harmful gas during combustion, which seriously threatens the safety of the tunnel and users, how to reduce the flammability and safety of the asphalt concrete pavement in the tunnel Combustion emissions have become the focus of research and attention by road professionals

Method used

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  • Flame-retardant lignin fiber for roads and preparation method thereof

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Effect test

Embodiment 1

[0028] 30 parts of red phosphorus, 50 parts of crystal water aluminum hydroxide, and 20 parts of hydrated magnesium silicate are thoroughly mixed and evenly prepared to prepare an inorganic flame retardant. And produce flame-retardant lignin fiber according to the following steps.

[0029] (1) Stock preparation: select oil absorption rate 6~8 times of material deadweight, the newsprint that ash content is less than 8% is used as the raw material of producing lignin fiber;

[0030] (2) cutting: cutting the prepared newsprint into fragments with a width of 9-11 mm;

[0031] (3) Pulverization: the pieces are added into the pulverization device, and lignin fibers are formed after pulverization, and the passing rate of the lignin fibers when passing through a 0.15mm sieve is 70 ± 10%,;

[0032] (4) Stirring: Add lignin fiber: 60%, leavening agent: 10%, and inorganic flame retardant: 30% into the stirring device according to weight percentage, so that leavening agent and inorganic ...

Embodiment 2

[0035] 50 parts of red phosphorus, 25 parts of crystal water aluminum hydroxide, and 30 parts of hydrated magnesium silicate are thoroughly mixed to prepare an inorganic flame retardant. And produce flame-retardant lignin fiber according to the following steps.

[0036] (1) Stock preparation: select oil absorption rate 6~8 times of material deadweight, the newsprint that ash content is less than 8% is used as the raw material of producing lignin fiber;

[0037] (2) cutting: cutting the prepared newsprint into fragments with a width of 9-11 mm;

[0038] (3) Pulverization: the pieces are added into the pulverization device, and lignin fibers are formed after pulverization, and the passing rate of the lignin fibers when passing through a 0.15mm sieve is 70 ± 10%,;

[0039] (4) Stirring: Add lignin fiber: 80%, leavening agent: 5%, and inorganic flame retardant: 15% into the mixing device according to weight percentage, so that leavening agent and inorganic flame retardant are eve...

Embodiment 3

[0042] 40 parts of red phosphorus, 35 parts of crystal water aluminum hydroxide, and 40 parts of hydrated magnesium silicate are thoroughly mixed to prepare an inorganic flame retardant. And produce flame-retardant lignin fiber according to the following steps.

[0043] (1) Stock preparation: select oil absorption rate 6~8 times of material deadweight, the newsprint that ash content is less than 8% is used as the raw material of producing lignin fiber;

[0044] (2) cutting: cutting the prepared newsprint into fragments with a width of 9-11mm;

[0045] (3) Pulverization: the pieces are added into the pulverization device, and lignin fibers are formed after pulverization, and the passing rate of the lignin fibers when passing through a 0.15mm sieve is 70 ± 10%,;

[0046] (4) Stirring: Add lignin fiber: 70%, leavening agent: 7.5%, and inorganic flame retardant: 22.5% into the stirring device according to weight percentage, so that leavening agent and inorganic flame retardant ar...

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Abstract

The invention discloses flame-retardant lignin fiber for roads and a preparation method thereof. The flame-retardant lignin fiber provided by the invention consists of the following materials in percentage by weight: 60 to 80 percent of lignin fiber, 5 to 10 percent of leavening agent and 15 to 30 percent of inorganic flame retardant. The preparation method comprises the following steps of: preparing the materials, cutting and crushing the materials to form the lignin fiber, then stirring the lignin fiber, the leavening agent and the inorganic flame retardant uniformly, and finally, compressing the mixture to form a finished product and packing the product under vacuum. The method for producing the flame-retardant lignin fiber for the roads by using waste newspaper and adopting a dry method utilizes the waste, accords with the era background of cyclic economy, does not generate harmful substances during production, has no any influence on the surrounding environment, and has the advantages of simple process flow, easy control and high production efficiency; and the product has good road performance, can effectively prevent the combustion of the lignin fiber and the bituminous mixture, and has obvious economic and social benefits.

Description

technical field [0001] The invention relates to a road-use flame-retardant lignin fiber and a preparation method thereof, in particular to a road-use lignin fiber with good flame-retardant effect and environmental friendliness and a preparation method thereof. Background technique [0002] Tunnels are an important part of highways, especially in mountainous and hilly areas, and often become the throat of the entire highway system due to their irreplaceability. Due to the relative closure of large tunnels, once a fire occurs, it will not only cause serious damage to the tunnel facilities and tunnel structure, cause traffic congestion or even interruption to varying degrees, but also threaten the personal safety of users, causing serious economic and social impacts. [0003] Asphalt concrete pavement is widely used in road engineering because of its good driving comfort, low noise, high visibility, and convenient maintenance. However, when it is applied in a tunnel, because t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08K3/26C08K3/02C08K3/22C08K3/34E01C7/26
Inventor 于新戴锋李英涛
Owner HOHAI UNIV