Modification method of basalt fiber in basalt fiber sprayed concrete for tunnel

A technology of basalt fiber and shotcrete, which is applied in the field of basalt fiber, can solve the problems of reducing the rebound rate of shotcrete, poor concrete fluidity, and reduced concrete fluidity, so as to enhance antistatic ability, enhance dispersion, and improve dispersion sexual effect

Active Publication Date: 2022-03-01
北京玄泽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After adding basalt fiber, it can effectively reduce the rebound rate of shotcrete, which in turn can increase the air pressure of the spray machine, improve the spray speed and construction quality, but due to the characteristics of the fiber itself, the fluidity of the concrete will deteriorate and reduce The fluidity of concrete itself slows down construction

Method used

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  • Modification method of basalt fiber in basalt fiber sprayed concrete for tunnel
  • Modification method of basalt fiber in basalt fiber sprayed concrete for tunnel
  • Modification method of basalt fiber in basalt fiber sprayed concrete for tunnel

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The modification method of the basalt fiber in the basalt fiber sprayed concrete for the tunnel of the present embodiment comprises the following steps:

[0048] Step 1: Heat the basalt fiber in an oven at 250°C for 2 hours, then soak it in acetone solution for 2 hours after cooling, take it out, rinse it with tap water several times until it is clean, and then dry it in the natural environment;

[0049] Step 2: soak it in silane coupling agent-absolute ethanol solution for 1 hour after drying, take it out, and then heat it in an oven at 120°C for 1 hour to make the basalt fiber and silane coupling agent completely react, and then use it after cooling .

[0050] In Step 2 of this embodiment, basalt fibers are used for heat improvement treatment before soaking in the silane coupling agent-absolute ethanol solution, and then placed in the surface modification solution for treatment.

[0051] The specific operation method of the thermal improvement treatment of the presen...

Embodiment 2

[0062] The modification method of the basalt fiber in the basalt fiber sprayed concrete for the tunnel of the present embodiment comprises the following steps:

[0063] Step 1: Heat the basalt fiber in an oven at 250°C for 2 hours, then soak it in acetone solution for 2 hours after cooling, take it out, rinse it with tap water several times until it is clean, and then dry it in the natural environment;

[0064] Step 2: soak it in silane coupling agent-absolute ethanol solution for 1 hour after drying, take it out, and then heat it in an oven at 120°C for 1 hour to make the basalt fiber and silane coupling agent completely react, and then use it after cooling .

[0065] In Step 2 of this embodiment, basalt fibers are used for heat improvement treatment before soaking in the silane coupling agent-absolute ethanol solution, and then placed in the surface modification solution for treatment.

[0066] The specific operation method of the thermal improvement treatment of the presen...

Embodiment 3

[0077] The modification method of the basalt fiber in the basalt fiber sprayed concrete for the tunnel of the present embodiment comprises the following steps:

[0078] Step 1: Heat the basalt fiber in an oven at 250°C for 2 hours, then soak it in acetone solution for 2 hours after cooling, take it out, rinse it with tap water several times until it is clean, and then dry it in the natural environment;

[0079] Step 2: soak it in silane coupling agent-absolute ethanol solution for 1 hour after drying, take it out, and then heat it in an oven at 120°C for 1 hour to make the basalt fiber and silane coupling agent completely react, and then use it after cooling .

[0080] In Step 2 of this embodiment, basalt fibers are used for heat improvement treatment before soaking in the silane coupling agent-absolute ethanol solution, and then placed in the surface modification solution for treatment.

[0081] The specific operation method of the thermal improvement treatment of the presen...

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Abstract

The invention discloses a modification method of basalt fibers in basalt fiber sprayed concrete for tunnels, which comprises the following steps: soaking the basalt fibers for 2 hours by using an acetone solution, completely washing the basalt fibers by using tap water, soaking the basalt fibers for 1 hour by using a silane coupling agent-absolute ethyl alcohol solution after the basalt fibers are dried, and taking out the basalt fibers; the preparation method comprises the following steps: 1, soaking basalt fibers in a silane coupling agent-absolute ethyl alcohol solution, heating the basalt fibers in a drying oven at 120 DEG C for 1 h to completely react the basalt fibers with the silane coupling agent, cooling the basalt fibers, and 2, carrying out thermal improvement treatment on the basalt fibers before soaking in the silane coupling agent-absolute ethyl alcohol solution, and treating the basalt fibers in a surface modification solution. Active groups of the KH560 type silane coupling agent can form hydrogen bonds or covalent bonds with the surface of basalt, and each unit group is subjected to dehydration condensation through a Si-O main chain and is paved on the surface of fiber to form a continuous new surface layer, so that defects on the surface of the fiber are repaired, filled and wrapped, and weak links of the KH560 type silane coupling agent are reduced.

Description

technical field [0001] The invention relates to the technical field of basalt fibers, in particular to a method for modifying basalt fibers in basalt fiber shotcrete for tunnels. Background technique [0002] Shotcrete is a kind of concrete formed by spraying a certain proportion of concrete at high speed onto the surface to be sprayed by using compressed air or other power by means of spraying machinery, which solidifies and hardens. The sprayed concrete construction is simple and fast, eliminating the need for formwork, pouring and formwork removal, and combining the conveying, pouring and vibration of concrete into one process, saving manpower and material resources, shortening the construction period, and the flexibility of sprayed concrete construction It is widely used in narrow space operation environments such as tunnel support and tunnel reinforcement. [0003] However, there are still some problems with sprayed concrete at present, such as the rebound rate (referr...

Claims

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Application Information

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IPC IPC(8): C04B20/04C04B20/02C04B14/46
CPCC04B20/04C04B20/023C04B14/4643
Inventor 刘丽丽郭林健张梓业郑彪
Owner 北京玄泽新材料科技有限公司
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