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A kind of rubber asphalt-based material for expansion joints of concrete structure and preparation method thereof

A technology of concrete structure and rubber asphalt, which is applied in the direction of building insulation materials, building components, building structures, etc., can solve the problems of difficult to achieve the expected performance of materials, unsatisfactory use effect, poor sealing effect of expansion joints, etc.

Active Publication Date: 2019-11-19
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, high performance will inevitably lead to high price, and at the same time, the actual application effect of the above-mentioned sealing materials on the expansion joints of high-speed rail structures is not satisfactory
There are many reasons. One is the material factor. These products have good performance, but the requirements for the construction environment are too high. For example, the concrete must be dry and clean without laitance; or the primer or surface treatment must be added. , otherwise the interface will crack due to poor bonding; the ambient temperature should not be too high or too low, otherwise it will affect the curing of the resin, and then affect the performance of the resin matrix and bonding performance; the second is construction factors. During on-site construction, the surface Poor handling or working with water will lead to poor curing and bonding of the sealant, making it difficult to achieve the expected performance of the material; in addition, various factors such as bidding and on-site quality management will lead to poor actual sealing effect of the expansion joint

Method used

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  • A kind of rubber asphalt-based material for expansion joints of concrete structure and preparation method thereof
  • A kind of rubber asphalt-based material for expansion joints of concrete structure and preparation method thereof
  • A kind of rubber asphalt-based material for expansion joints of concrete structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1: Preparation of rubber asphalt-based material for concrete structure expansion joints according to the present invention

[0060] 1. The raw materials and dosage: asphalt 41.7g, third-line furfural-reduced oil 22.9g, SBS 2.1g, SBR 13.0g, DOS 4.2g, terpene resin 5.2g, PB2400 polyisobutylene 5.1g, POE 4.2g, Honeywell Titan Special asphalt additive 1.6g;

[0061] 2. Preparation method:

[0062] (1) Add the base asphalt heated to 130°C into the mixing pot, raise the temperature to 170°C, start the electric mixer to stir, and the speed is 100-200rpm;

[0063] (2) In the system of step (1), add the third-line furfural-extracted oil, SBS and SBR in sequence, and continue heating and stirring at 170° C., with a rotating speed of 50-100 rpm, until there are no infusible particles;

[0064] (3) In the system of step (2), add DOS, terpene resin, POE, polyisobutylene, special asphalt additives, etc. in sequence, raise the temperature to 180°C, continue heating and s...

Embodiment 2

[0065] Embodiment 2: Preparation of rubber asphalt-based material for concrete structure expansion joints according to the present invention

[0066] 1. The raw materials and dosage: 41.7g of asphalt, 22.0g of furfural-reduced third-line extract oil, 2.1g of SBS, 13.0g of SBR, 2.1g of Fischer-Tropsch wax, 5.2g of DOS, 3.1g of terpene resin, 6.2g of PB2400 polyisobutylene, POE 3.2g, Honeywell Titan special asphalt additive 1.4g;

[0067] 2. Preparation method:

[0068] (1) Add the base asphalt heated to 130°C into the mixing pot, raise the temperature to 170°C, start the electric mixer to stir, and the speed is 100-200rpm;

[0069] (2) In the system of step (1), add the third-line furfural-extracted oil, SBS and SBR in sequence, and continue heating and stirring at 170° C., with a rotating speed of 50-100 rpm, until there are no infusible particles;

[0070] (3) In the system of step (2), add Fischer-Tropsch wax, DOS, terpene resin, POE, polyisobutylene, special asphalt add...

Embodiment 3

[0071] Embodiment 3: Preparation of rubber asphalt-based material for concrete structure expansion joints according to the present invention

[0072] 1. The raw materials and dosage: asphalt 41.0g, third-line furfural-reduced oil 22.0g, SBS 2.1g, SSBR 14.0g, paraffin 2.1g, DOS 5.2g, terpene resin 2.1g, PB2400 polyisobutylene 6.0g, POE2. 0g, vinyltrimethoxysilane 1.5g, Honeywell Titan special asphalt additive 2.0g;

[0073] 2. Preparation method:

[0074] (1) Add the base asphalt heated to 130°C into the mixing pot, raise the temperature to 170°C, start the electric mixer to stir, and the speed is 100-200rpm;

[0075] (2) In the system of step (1), add the third-line furfural-extracted oil, SBS and SSBR in sequence, and continue heating and stirring at 170° C., with a rotating speed of 50-100 rpm, until there are no infusible particles;

[0076] (3) In the system of step (2), add paraffin wax, DOS, terpene resin, POE, polyisobutylene, vinyltrimethoxysilane, special asphalt ...

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Abstract

The invention provides a rubber asphalt-based material used for concrete structured expansion joints. The rubber asphalt-based material comprises by mass, 35-45% of asphalt, 20-30%of softening oil, 10-20% of a modifier, 0-5% of a polyolefin elastomer, 0-6% of a plasticizer, 5-15% of tackifying resin, 0-3% of a viscosity adjuster, 0-5% of an interface agent and 0-3% of a special asphalt additive. Compared with silicone rubber and urethane room temperature sealants, the rubber asphalt-based material provided by the invention has the advantages of low requirements of bases, good wet interface cohesiveness, good weatherability, good durability, extremely excellent sealing effect and low price.

Description

technical field [0001] The invention belongs to the field of railway waterproof materials, and in particular relates to a rubber asphalt-based material for expansion joints of concrete structures and a preparation method thereof. Background technique [0002] my country's high-speed railway mainly adopts ballastless track structure, mainly including CRTS type I, type II, type III slab ballastless track and CRTS type I, type II double-block ballastless track. Among them, for the concrete structure (base plate, supporting layer or double-block pouring layer) that is continuously poured on site, expansion joints are provided at regular intervals so that the main structure can expand and contract freely under different temperature conditions and prevent irregularities in the structure. At the same time, in order to prevent the entry of rainwater and sundries and ensure the long-term realization of the expansion and contraction function, the expansion joints must be treated. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/00C08L53/02C08L9/08C08L45/00C08L23/20C08L23/08C08L91/06C08K5/11E01B1/00
CPCC08L95/00C08L2205/02C08L2205/035E01B1/002E01B2204/09C08L91/00C08L53/02C08L9/08C08L45/00C08L23/22C08L23/0815C08K5/11C08L91/06
Inventor 贾恒琼李海燕吴韶亮王涛魏曌杜玮张琪王炳岩
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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