Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Concrete for railway switch base filling layer and pouring method

A technology of concrete and filling layers, applied in the direction of track, road, track maintenance, etc., can solve the problems that cannot guarantee the quality of concealed key engineering parts, cannot fully adapt to various construction environments, and is not conducive to the continuity of dense concrete pouring, etc. Achieve excellent self-filling performance, improve the construction environment and the surrounding environment of the site, and achieve the effects of excellent fluidity

Active Publication Date: 2012-08-01
ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of conventional construction methods is not conducive to ensuring the continuity of self-compacting concrete pouring; second, the construction efficiency is low, the transfer bucket is relatively heavy, inconvenient to move, construction machinery such as cranes move frequently, and the total construction time is long; third, it cannot fully adapt to multiple Various construction environments, such as narrow sites, high-altitude operations, etc.
Due to the complex internal structure of the turnout filling layer, the thickness is only 180mm, and the distance required for concrete self-leveling is as high as 6.7m. Ordinary concrete is easy to segregate, bleed, and has poor wrapping properties under high fluidity, which cannot guarantee the quality of concealed key engineering parts. , unable to meet the construction requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Concrete for railway switch base filling layer and pouring method
  • Concrete for railway switch base filling layer and pouring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Railway turnout base filling layer 1M according to the present invention 3 Concrete (self-leveling concrete) is made by mixing the following raw materials: specific surface area ≤ 350 m 2 / kg P 042.5 ordinary Portland cement 370kg; S95 type, specific surface area 350-500 m 2 90 kg of slag powder per kg; Class I, fly ash with a fineness of ≤12% 90 kg; ANF concrete expansion agent 44 kg; Sand in Zone II 866 kg; 5-10mm continuously graded crushed stone 738 kg; 184 kg of water; 7.7 kg of AN4000 polycarboxylate superplasticizer.

[0018] In order to ensure the pouring quality of the filling layer of the railway turnout base, the materials used should also pay attention to the following points:

[0019] (1) Portland cement or ordinary Portland cement should be used for cement, and early-strength cement should not be used, in which free calcium oxide ≤ 1.0%, alkali content ≤ 0.80%, C in clinker 3 A≤8%,CL - Content ≤0.06%, SO 3 Content≤3.5%.

[0020] (2) Mineral admixture...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses concrete for a railway switch base filling layer. The concrete is mixed by raw materials including 370 parts of cement, 180 parts of mineral mixtures, 44 parts of expanding agent, 866 parts of river sand, 738 parts of broken stones, 184 parts of water and 7.7 parts of polycarboxylic copolymer according to 1M3 filling quantity standard. When the railway switch base filling layer is poured, a leveling blanket and switch slabs are constructed according to a conventional method at first, a pouring mode by the aid of a pump truck, a transfer hopper and a chute is adopted, and each switch slab is poured at one step. As the concrete has excellent mobility and a self-filling performance, the concrete can pass through an engineering portion with compact reinforcements and the complex structural section, is dense in filling, does not segregate or leak water, and has high homogeneity, engineering quality is guaranteed, durability of a concrete structure is improved, the problem that pouring of vibration operation components is not easy to be applied or cannot be applied is resolved, pouring speed is improved, a construction process of the concrete structure is simplified, construction efficiency and construction quality are improved, and construction period is shortened.

Description

technical field [0001] The invention relates to a preparation method and pouring method of self-leveling concrete for railway construction, in particular to a concrete for a filling layer of a railway turnout base, and a method for pouring the filling layer of a railway turnout base using the concrete. Background technique [0002] The high-speed railway turnout base is composed of leveling layer, filling layer and turnout slab from bottom to top. The track is laid on the top of the turnout slab. The conventional construction method is to first carry out steel bar binding construction and insulation test, and then use the crane bucket to cooperate with the transfer bucket. Self-compacting concrete pouring construction. The use of conventional construction methods is not conducive to ensuring the continuity of self-compacting concrete pouring; second, the construction efficiency is low, the transfer bucket is relatively heavy, inconvenient to move, construction machinery such...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04E01B29/00
Inventor 赵红伟张文格王治方黄伟周英于伟超
Owner ZHENGZHOU ENG CO LTD CHINA RAILWAY SEVENTH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products