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Special concrete for railway sleeper and railway sleeper poured by using concrete

A technology for railway sleepers and concrete, which is applied in the field of railway sleepers and special concrete for railway sleepers. It can solve problems such as the reduction of bearing capacity of railway sleepers, the influence of vehicle operation, and cracks on the surface of railway sleepers. It achieves enhanced compactness, enhanced bearing capacity, and improved resistance Osmotic effect

Inactive Publication Date: 2022-04-26
广东华南混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, railway sleepers are poured with special concrete. However, because the railway sleepers bear the load of the vehicle weight for a long time, cracks appear on the surface of the railway sleepers, which in turn reduces the bearing capacity of the railway sleepers, thus affecting the operation of the vehicles.

Method used

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  • Special concrete for railway sleeper and railway sleeper poured by using concrete
  • Special concrete for railway sleeper and railway sleeper poured by using concrete
  • Special concrete for railway sleeper and railway sleeper poured by using concrete

Examples

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Effect test

Embodiment 1-4

[0054] This embodiment discloses a special concrete for railway sleepers, which includes the following components by weight:

[0055] Portland cement; sand; recycled gravel; polypropylene fiber; polyamide epichlorohydrin resin; silica powder; admixture; water reducer; water.

[0056] This embodiment also discloses a method for preparing concrete for railway sleepers, comprising the following steps:

[0057] Step (1): According to the ratio in Table 2, add polypropylene fiber, polyamide epichlorohydrin resin and silicon micropowder into the stirring tank, stir at a speed of 120r / min for 20min, and mix evenly to obtain a mixture;

[0058] Step (2): While stirring, add Portland cement, sand, recycled gravel, admixtures, water reducer and water to the mixture, stir at a speed of 100r / min for 30min, and mix well to obtain concrete. Compound;

[0059] Step (3): Evenly pour the concrete mixture into the mold, and cure and shape to obtain concrete (for railway sleepers).

[0060] T...

Embodiment 5

[0065] The difference from Example 4 is that the length of the polypropylene fiber is 12mm.

Embodiment 6

[0067] The difference from Example 4 is that the length of the polypropylene fiber is 16mm.

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Abstract

The invention relates to the field of concrete, and particularly discloses special concrete for railway sleepers, which comprises the following components in parts by weight: 256-275 parts of Portland cement; 788 to 974 parts of sand; 896 to 1145 parts of regenerated broken stone; 10 to 22 parts of polypropylene fiber; 14 to 23 parts of polyamide epichlorohydrin resin; 8-14 parts of silica powder; 11 to 21 parts of an admixture; 4-9 parts of a water reducing agent; and 125 to 136 parts of water. The invention further discloses a railway sleeper formed by pouring the concrete. The railway sleeper has the effect that the railway sleeper is not prone to cracks.

Description

technical field [0001] The application relates to the field of concrete, and more specifically, it relates to a special concrete for railway sleepers and railway sleepers poured with the concrete. Background technique [0002] Railway sleepers are the basic materials used for laying railway lines and are an indispensable and important material for railway superstructures. Railway sleepers are generally used to fix the gauge of railway tracks, carry the weight load of rails and vehicles, so that the track pressure load can be evenly dispersed and transmitted to the subgrade, and the line can be kept stable and smooth. [0003] Generally, railway sleepers are poured with special concrete. However, because the railway sleepers bear the load of the vehicle weight for a long time, cracks appear on the surface of the railway sleepers, which in turn reduces the bearing capacity of the railway sleepers, thereby affecting the operation of the vehicles. Therefore, there is still room...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E01B3/28
CPCC04B28/04E01B3/28C04B2111/0075C04B2201/50C04B2201/52C04B14/06C04B14/062C04B18/167C04B16/0633C04B24/287C04B24/26C04B18/145C04B24/18
Inventor 付清峰
Owner 广东华南混凝土有限公司
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