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Production method of durable lightweight concrete for vibration reduction and isolation track bed

A technology of lightweight concrete and its production method, which is applied in the fields of lightweight concrete and durable lightweight concrete, can solve the problems of limited service life, high price, and difficulty in achieving vibration reduction and vibration isolation effects, so as to reduce additional vibration or The effect of causing secondary vibration

Inactive Publication Date: 2018-08-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No vibration-reducing measures are adopted for the foundation ballast bed in the general section of the subway project, but only vibration-reducing facilities are used in the areas where hospitals, workshops, and government agencies that require vibration reduction are located, such as floating slab ballast bed and elastic short sleeper integral ballast bed Rails, rubber pads and other measures are used to reduce vibration, but these measures are difficult to achieve good vibration reduction and isolation effects, the vibration attenuation is 6-10 dB, the service life is limited, and the price is expensive

Method used

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  • Production method of durable lightweight concrete for vibration reduction and isolation track bed
  • Production method of durable lightweight concrete for vibration reduction and isolation track bed
  • Production method of durable lightweight concrete for vibration reduction and isolation track bed

Examples

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Effect test

Embodiment 1

[0018] The manufacturing method of durable lightweight concrete for a vibration-damping and vibration-isolated ballast bed described in this embodiment, the specific manufacturing method is as follows:

[0019] 1) The volume ratio of concrete and EPS particles is 7:3 (see Table 1 for the ratio of related materials), the strength grade of lightweight concrete reaches C35, the particle size of EPS particles is 2mm, and the bulk density of EPS particles is 14kg / m 3 ;

[0020] 2) Mix the concrete and EPS particles according to the ratio determined in step 1). In order to prevent the light concrete from cracking under the long-term vibration of the subway train, a certain amount of polyacrylonitrile fiber is added during the production process. The mixing ratio is 0.09% of the cement weight;

[0021] 3) Since EPS particles and acrylonitrile fibers are hydrophobic materials, in order to ensure that EPS particles and acrylonitrile fibers can be evenly mixed with concrete, it is nece...

Embodiment 2

[0026] The manufacturing method of durable lightweight concrete for a vibration-damping and vibration-isolated ballast bed described in this embodiment, the specific manufacturing method is as follows:

[0027] 1), the volume ratio of lightweight concrete and EPS particles is 3:1 (see Table 2 for the relevant material ratio), the strength grade of lightweight concrete reaches C40, the particle size of EPS particles is 1mm, and the bulk density of EPS particles is 12kg / m 3 ;

[0028] 2) Mix the concrete and EPS particles according to the ratio determined in step 1). In order to prevent the light concrete from cracking under the long-term vibration of the subway train, a certain amount of polyacrylonitrile fiber is added during the production process. The mixing ratio is 0.07% of the cement weight;

[0029] 3) Since EPS particles and acrylonitrile fibers are hydrophobic materials, in order to ensure that EPS particles and acrylonitrile fibers can be evenly mixed with concrete, ...

Embodiment 3

[0034] The manufacturing method of durable lightweight concrete for a vibration-damping and vibration-isolated ballast bed described in this embodiment, the specific manufacturing method is as follows:

[0035] 1), the volume ratio of concrete and EPS particles is 4:1 (see Table 3 for the ratio of related materials), the strength grade of lightweight concrete reaches C35, the particle size of EPS particles is 2mm, and the bulk density of EPS particles is 12kg / m 3 .

[0036] 2) Mix the concrete and EPS particles according to the ratio determined in step 1). In order to prevent the light concrete from cracking under the long-term vibration of the subway train, a certain amount of polyacrylonitrile fiber is added during the production process. The mixing ratio is 0.06% of the cement weight.

[0037] 3) Since EPS particles and acrylonitrile fibers are hydrophobic materials, in order to ensure that EPS particles and acrylonitrile fibers can be evenly mixed with concrete, it is nec...

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Abstract

The invention discloses a production method of durable lightweight concrete for vibration reduction and isolation track beds. A lightweight concrete material is prepared from the durable lightweight concrete formed by mixing an expandable polystyrene (EPS) particle lightweight material with stones, sand, cement and auxiliary additives according to a certain ratio; the composite track beds producedby pouring the lightweight concrete are prevented from cracking, long-term vibration reduction and isolation of a subway can be realized, and the defects of the existing subway vibration reduction and isolation product are overcome.

Description

technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a method for making durable lightweight concrete for vibration-reducing and isolating ballast beds. The lightweight concrete is made by mixing EPS particle lightweight materials with stones, sand, cement and some additives in a certain proportion. Using this kind of lightweight concrete to pour into subway vibration-reducing vibration-isolation track bed, and carry out relevant design and application. Background technique [0002] With the acceleration of my country's subway construction and the continuous increase of operating mileage, ensuring the safety of subway operation is not only an important livelihood project, but also a strategic project for urban development of green economy, which is related to everyone's travel safety. In fact, many potential safety hazards and hazards have appeared in the operation of subways in cities such as Shanghai and Nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E01B19/00E01B1/00C04B111/40C04B111/20
CPCC04B28/00C04B2111/0075C04B2111/20C04B2111/40E01B1/002E01B19/00C04B16/08C04B16/0658C04B24/045C04B14/06C04B14/02
Inventor 缪林昌
Owner SOUTHEAST UNIV
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