High-polymer self-compacting concrete for filling layer of ballastless track of steel truss girder

A technology of ballastless track and high polymer, which is applied in the field of building materials, can solve problems such as difficulty in ensuring project quality, achieve the effects of alleviating flow performance and stability performance, reducing porosity, and improving firmness

Inactive Publication Date: 2018-06-01
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the existing cement emulsified asphalt mortar technology and self-compacting concrete technology is difficult to guarantee the quality of the project

Method used

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  • High-polymer self-compacting concrete for filling layer of ballastless track of steel truss girder
  • High-polymer self-compacting concrete for filling layer of ballastless track of steel truss girder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: The weight ratio of each component of high polymer self-filling concrete is:

[0041]

[0042] The main properties of the polymer self-filling concrete are shown in Table 1.

[0043] Table 1 Main properties of polymer self-filling concrete

[0044]

[0045] It can be seen from Table 1 that the polymer self-filling concrete proposed by the present invention has high fluidity, good stability, high bonding strength, and excellent durability, and can be used for the filling layer structure of steel truss girder slab ballastless track.

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Abstract

The invention belongs to the technical field of materials and in particular relates to high-polymer self-compacting concrete for a ballastless track of a steel truss girder. The high-polymer self-compacting concrete is characterized by being prepared by mixing a dry material and a liquid material in a forced mixer according to a certain ratio, wherein the ratio of the dry material to the liquid material is 1:(0.08-0.25). The dry material is prepared from a cementitious component, an inert mineral admixture, an expansive component, coarse aggregates and fine aggregates; and the liquid materialis prepared from a polymer emulsion, a water reducer, a defoaming agent, an air entraining agent and water. The high-polymer self-compacting concrete has the characteristics of high flowability (slumpflow is 560-700mm), good stability, high cementing strength and excellent durability, is suitable for the ballastless track of the steel truss girder and is also suitable for bridges, civil buildingsas well as repairing and strengthening fields.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high polymer self-filling concrete used for the filling layer of steel truss girder ballastless track, and is suitable for the filling layer of steel truss girder ballastless track structure and other structures. Background technique [0002] At present, there are two main types of track slab filling layer materials used in my country's slab ballastless track, one is cement emulsified asphalt mortar used in CRTS Ⅰ and Ⅱ slab ballastless track systems, and the other is used in CRTS Ⅲ slab ballastless track systems self-compacting concrete. [0003] Cement emulsified asphalt mortar is composed of cement, sand, emulsified asphalt, admixture, water and various admixtures. It is an organic-inorganic composite material formed by the joint action of cement hydration hardening and asphalt demulsification and cementation. From the structural characteristics of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/06C04B28/34C04B111/20C04B111/76
CPCC04B28/00C04B28/04C04B28/06C04B28/34C04B2111/20C04B2111/76C04B18/08C04B18/141C04B18/146C04B14/106C04B22/064C04B22/066C04B22/142C04B14/02C04B14/06C04B14/068C04B18/12C04B24/26C04B2103/302C04B2103/50C04B2103/304
Inventor 李化建黄法礼易忠来
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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