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Once integral-molded bamboo sleeper and preparation method thereof

A technology of integral molding and sleepers, which is applied in new materials for urban rail transit and in the field of railways. It can solve the problems of high carbon consumption affecting the environment, poor insulation, and difficulty in recycling, and achieve outstanding economic benefits, good insulation, and environmental friendliness.

Active Publication Date: 2019-05-10
HUNAN TAOHUAJIANG BAMBOO SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, ballasted tracks in railways and urban rail transit mostly use wooden sleepers, concrete sleepers, steel sleepers, composite material sleepers, etc. After a long period of engineering application, it is found that: short life, easy to wear, wooden sleepers are susceptible to biological erosion, different wood sleepers There are differences in the mechanical properties of sleepers. Chemicals such as creosote oil required for the anticorrosion treatment of wooden sleepers are harmful to the environment and human health, and other problems in the application of sleepers; concrete sleepers, train loads due to their high rigidity produce large dynamic stress damage to railway tracks , poor insulation, high brittleness, poor elasticity, there is a risk of impact damage, low stability, heavy weight, difficult to replace, difficult to recycle, high cost of waste disposal, high carbon consumption affects the environment; steel sleepers also have non-insulation, driving Disadvantages such as high noise, high rigidity, easy to rust, high carbon consumption and environmental impact; composite sleepers are also found to be light in weight, fasteners and bolts have poor nail holding ability, and the strength of the bonding layer is uneven, and it is easily affected by the environment and becomes brittle wait for not enough

Method used

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  • Once integral-molded bamboo sleeper and preparation method thereof
  • Once integral-molded bamboo sleeper and preparation method thereof
  • Once integral-molded bamboo sleeper and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 (take a 1800mm long, 200mm wide, 140mm thick bamboo sleeper as an example)

[0042] Such as figure 1 As shown, the preparation method of the integrally formed bamboo sleeper of the present embodiment specifically comprises the following steps:

[0043] (1) Select 4-year-old Moso bamboo, cut it off, and each section is 1900mm±10mm to obtain round bamboo sections.

[0044] (2) Break the bamboo rounds into bamboo units, remove 100% of the bamboo green and bamboo yellow, cook in ammonia water with a pH value of 8.5 for 30 minutes, wash with water, and then mechanically grind them into filamentous bamboo units.

[0045] (3) The filamentary bamboo unit is dried in superheated steam with a dry bulb temperature of 150°C and a superheated degree of 30°C to a moisture content of about 13%, to obtain a dried and modified filamentary bamboo unit. High-temperature hydrothermal modification treatment can kill microorganisms and insect pests, and can also decompose star...

Embodiment 2

[0060] This embodiment is roughly the same as Embodiment 1, except that the high-frequency assisted high-temperature hot-pressing process is replaced by bi-directional pressure-bi-directional heating forming technology, and the specific steps are as follows:

[0061] Assemble the blanks to obtain a slab, put the slab on the backing plate, apply pressure and heat treatment to the upper and lower sides of the slab for 70 minutes, and solidify the slab to obtain a bamboo sleeper blank, wherein the center of the slab is The pressure is 20MPa and the temperature is 130°C.

Embodiment 3

[0063] This embodiment is roughly the same as Embodiment 1, except that the high-frequency assisted high-temperature hot-pressing process is replaced by room-temperature cold-press mold clamping-high-temperature curing molding technology, and the specific steps are as follows:

[0064] Place the billet in the cold pressing mold, and use the cold press to compress the billet in the mold. After the compression reaches 140mm, lock the mold and the billet, and then send the mold loaded with the billet into a high-temperature drying kiln at a temperature of 130°C In the middle, it lasts for 5 hours to fully solidify the slab. After the curing is completed, let the mold and the slab gradually cool in the indoor environment. When the temperature of the slab is 40°C higher than the indoor temperature, remove the mold, and the bamboo sleeper slab is solidified and formed. Obtain bamboo sleeper blanks.

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Abstract

The invention discloses a once integral-molded bamboo sleeper. The once integral-molded bamboo sleeper uses bamboo units as raw materials for drying and modification in overheated water vapor with a superheat degree of 10-80 DEG C, impregnation, whirl coating, curing, dopamine solution treatment, mould-proof and / or antiseptic and / or insect-proof treatment and fastening to obtain a finished product; and the density of the once integral-molded bamboo sleeper is 0.9-1.5 g / cm3. The invention further provides a preparation method of the bamboo sleeper. The prepared bamboo sleeper is proper in elastic modulus and suitable for ballast tracks of railways and urban railway systems.

Description

technical field [0001] The invention relates to the field of new materials for railways and urban rail transit, in particular to a one-time integrally formed bamboo sleeper and a preparation method thereof. Background technique [0002] At present, ballasted tracks in railways and urban rail transit mostly use wooden sleepers, concrete sleepers, steel sleepers, composite material sleepers, etc. After a long period of engineering application, it is found that: short life, easy to wear, wooden sleepers are susceptible to biological erosion, different wood sleepers There are differences in the mechanical properties of sleepers. Chemicals such as creosote oil required for the anticorrosion treatment of wooden sleepers are harmful to the environment and human health, and other problems in the application of sleepers; concrete sleepers, train loads due to their high rigidity produce large dynamic stress damage to railway tracks , poor insulation, high brittleness, poor elasticity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M3/14B27M1/08B27K3/12B27K3/16B27K3/38B27K5/00B27K9/00B27J1/00E01B3/02
CPCB27J1/00E01B3/02B27J1/003B27N3/203B27N3/002E01B3/44E01B3/46B27M3/0026B27M3/0046B27N1/00B27N3/02B27N3/18B27K9/002B27K3/12B27K3/16E01B3/42E01B3/26
Inventor 胡进波彭坚曾卫红熊艳辉刘迪钦薛志成李贤军吴志平苌姗姗刘贡钢李婷
Owner HUNAN TAOHUAJIANG BAMBOO SCI & TECH CO LTD
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