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A kind of concrete with vibration damping function for sleepers

A technology of concrete and concrete composition, which is applied in the field of cement building materials and can solve problems such as high damping ratio and poor vibration reduction effect of sleepers

Active Publication Date: 2019-02-22
CHINA ROAD & BRIDGE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete with the porous gravel as the coarse aggregate has a high damping ratio, thereby solving the problem of poor vibration damping effect of conventional prestressed concrete sleepers

Method used

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  • A kind of concrete with vibration damping function for sleepers
  • A kind of concrete with vibration damping function for sleepers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 A kind of concrete composition and fresh concrete prepared therefrom

[0051] The composition of the concrete composition of this embodiment is shown in Table 1.

[0052] The fresh concrete described in this embodiment is prepared by the following method:

[0053] (1) take the weight of the cementitious material (cement and fly ash) as a benchmark, prepare water that accounts for 28% of its weight;

[0054] (2) Add the concrete composition and water into the mixer, and stir for 120 seconds to obtain.

Embodiment 2

[0079] Example 2 A kind of concrete composition and fresh concrete prepared therefrom

[0080] The composition of the concrete composition of this embodiment is shown in Table 2.

[0081] The freshly mixed concrete of the present embodiment is prepared by the following method:

[0082] (1) based on cement weight, prepare water that accounts for 28% of its weight;

[0083] (2) First add the concrete composition except the water reducer to the mixing equipment and stir for 15 seconds, then add the water reducer and water and stir for 135 seconds to obtain the product.

Embodiment 3

[0084] Example 3 A kind of concrete composition and fresh concrete prepared therefrom

[0085] The composition of the concrete composition of this embodiment is shown in Table 2.

[0086] The fresh concrete of this example was prepared by the same method as Example 2, except that the weight of water was 50% of the weight of cement.

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Abstract

The present invention relates to use of a porous broken stone in preparation of vibration damping function concrete; and the porous broken stone is selected from any one or a variety of porous broken stones in any weight ratio of porous basalt broken stone, porous limestone broken stone and porous granite broken stone. The invention also provides a concrete composition using the porous broken stone as a coarse aggregate and application thereof in preparation of prestressed concrete sleepers. The concrete composition comprises 100 parts by weight of cement, 5-50 parts by weight of fly ash, 100-200 parts by weight of a fine aggregate, 200-380 parts by weight of the coarse aggregate, 0.05-2 parts by weight of a viscosity modifier, 0.05-2 parts by weight of a pore refiner and 0.8-4.0 parts by weight of a water reducing agent. After hardening of fresh mixed concrete prepared from the concrete composition, internal pore distribution is reasonable, strength requirements are met, and at the same time, the fresh mixed concrete has a high damping ratio so as to solve the poor vibration effect problems of conventional prestressed concrete sleepers.

Description

technical field [0001] The invention belongs to the field of cement building materials, and in particular relates to concrete used for preparing prestressed sleepers for passenger or freight railway ballast. The concrete provided by the invention can improve the damping performance of the prestressed sleeper. Background technique [0002] The sleeper is one of the necessary accessories for the construction of a ballasted railway. It not only supports the rail, but also maintains the position of the rail, and also transmits the huge pressure transmitted by the rail to the ballast bed. Therefore, the sleeper must have a certain degree of flexibility and elasticity: when the train passes by, the sleeper can be properly deformed to buffer the pressure; after the train passes, it must be restored to its original shape as much as possible. According to the material, sleepers can be divided into wooden sleepers, steel sleepers, prestressed concrete sleepers, etc. Among them, prest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/14C04B14/28C04B14/04C04B28/04C04B38/08C04B111/20
CPCC04B14/048C04B14/14C04B14/28C04B28/04C04B2111/2046C04B2201/50C04B18/08C04B14/068C04B24/383C04B24/34C04B2103/302C04B38/08
Inventor 孟晓鹏冯云龙杨芳娃徐俊东高波唐祖阳冷冬崔振东古俊晓陈勇华徐鑫王涛管强马记刘子科李洪刚吴振兴贾恒琼周晶华郭勇李启发宋照军
Owner CHINA ROAD & BRIDGE
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