Waterproof and vibration-isolating microporous elastomer material for high-speed railway base and its structure

A microporous elastomer, waterproof and insulating technology, applied in building materials and application fields, can solve the problems of long-term waterproof and impermeability and insufficient vibration isolation performance, and achieve the effects of excellent support performance, few steps, and simple process

Active Publication Date: 2022-07-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a waterproof and vibration-isolation microporous elastomer material composited with waste rubber powder and polyurethane for high-speed railway foundation waterproof and vibration isolation with good water resistance, extensibility, weather resistance and processing performance, and its preparation is stipulated method, and provide a high-speed railway foundation waterproof and vibration isolation structure and layout method based on the microporous elastomer material, so as to solve the problem of insufficient long-term waterproof, anti-seepage and vibration isolation performance of the existing roadbed waterproof, vibration isolation materials and structures

Method used

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  • Waterproof and vibration-isolating microporous elastomer material for high-speed railway base and its structure
  • Waterproof and vibration-isolating microporous elastomer material for high-speed railway base and its structure
  • Waterproof and vibration-isolating microporous elastomer material for high-speed railway base and its structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A railway roadbed waterproof and vibration-isolating microporous elastomer material and structure composited with waste rubber powder and polyurethane, wherein the composite waterproof and vibration-isolating microporous elastomer material of waste rubber powder and polyurethane is composed of the following preparation raw materials in parts by weight :

[0035] 30 parts of waste rubber powder with particle size of 80 meshes, 34-40 parts of polyurethane binder A component whose main component is polyol, 30-35 parts B component of polyurethane binder whose main component is polyisocyanate, 0.8 parts of polyurethane defoamer share.

[0036] in:

[0037] The source of the waste rubber powder with a particle size of 80 meshes is: the purchased grade is Guangzhou Aiqi Technology Co., Ltd. Fine Energy Rubber Powder, 80 meshes, in line with the GB T 19208-2008 standard;

[0038] The source of the component A of the polyurethane binder whose main component is polyol is: the p...

Embodiment approach

[0045] This embodiment includes the following steps:

[0046](1) After building the soil foundation 1, the bottom layer 2 of the foundation bed and the surface layer 3 of the foundation bed, set a mold of a certain width and length according to the planning and construction design, and set the thickness of the waterproof and vibration isolation layer according to the service environment where the waterproof and vibration isolation layer is located. is 5 cm;

[0047] (2) According to the total construction amount and the above-mentioned raw material ratio, prepare and weigh the raw materials, place the waste rubber powder in an oven, stir and dry at 110 ° C for 2 hours;

[0048] (3) Weigh the polyurethane binders A and B and add them to the low-speed shearing mixer, control the rotation speed to be 60 rpm, shear and stir for 1 minute, then add the dry waste rubber powder, shear and stir for 1 minute, and then mix Add polyurethane defoamer, shear and stir for 0.5 minutes;

[0...

Embodiment 2

[0055] A waterproof and vibration isolation structure for high-speed railway base based on the composite waterproof and vibration isolation microporous elastomer material of waste rubber powder and polyurethane

[0056] This embodiment is roughly the same as the above-mentioned Embodiment 1, and the difference lies in this embodiment:

[0057] (1) According to the design, construction drawing design and the service environment where the waterproof vibration isolation layer is located, set the length, width and thickness of the waterproof vibration isolation layer prefabricated parts, and set the prefabricated mold;

[0058] (2) shearing and stirring to configure the mixture;

[0059] (3) pour the mixture into the prefabricated mould, let it stand for 1-2 days and then demould;

[0060] (4) After building the soil foundation 1, the bottom layer 2 of the foundation bed and the surface layer 3 of the foundation bed, install the prefabricated waterproof vibration isolation layer ...

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Abstract

The invention discloses a waterproof and vibration-isolating microporous elastomer material and its structure for high-speed railway foundation, and relates to the field of building materials and application. Microcellular elastomer material, raw materials are in parts by mass: 23-32 parts of waste rubber powder with a particle size of 12 mesh to 200 mesh, 34-40 parts of polyurethane binder A component whose main component is polyol, and main component is polyisocyanate 30-35 parts of the B component of the polyurethane binder and 0.6-1.0 parts of the polyurethane defoamer. The microporous elastomer material of the invention has high modulus, good mechanical properties and vibration damping and vibration isolation properties. Subgrade waterproofing and vibration isolation structure, when used for railway subgrade, includes soil foundation, subgrade bottom layer, subgrade surface layer, microporous elastomer waterproof vibration isolation layer, asphalt or cement concrete support layer and superstructure, which are laid in sequence from bottom to top. The layout method when the vibration isolation layer is used for on-site pouring: set the mold; shear and stir to configure the mixture; pour the waterproof vibration isolation layer. It is used for high-speed railway foundation, which makes the subgrade have good waterproof and vibration isolation performance, and can effectively slow down the degradation of the subgrade.

Description

technical field [0001] The invention relates to the field of building materials and applications, in particular to a waterproof and vibration-isolating microporous elastomer material and structure used for the composite of waste rubber powder and polyurethane for high-speed railway bases. Background technique [0002] Vibration loads and the increase in subgrade moisture content accompanying weather conditions such as rain, snow, and frost are two main factors that lead to the degradation of subgrade performance. Diseases such as silting, uneven settlement or frost heave will seriously reduce the service life of transportation infrastructure and cause traffic safety hazards. [0003] The introduction of high-performance subgrade waterproofing and vibration isolation structures is an effective measure to improve the durability of subgrades under long-term traffic loads and severe weather conditions. At present, the common high-speed railway-based waterproof structural layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L19/00E01B2/00E01B19/00
CPCC08L75/04E01B2/00E01B19/003E01B2204/01C08L19/003Y02W30/91
Inventor 肖飞鹏肖鑫王嘉宇李进宗启迪侯向导
Owner TONGJI UNIV
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