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Low-shrink anchorage sealing material for CRTS I type ballastless track slabs of high speed railway

A technology for ballastless track and high-speed railway, which is applied in the field of prefabricated box girder and T-beam prestressed steel bar end sealing treatment, high-speed railway CRTS I type ballastless track slab prestressed steel anchorage treatment field, and can solve the problem of sealing anchor materials Problems such as non-compactness, shrinkage cracking, and low bond strength can achieve the effects of improving impermeability and bond strength, improving impermeability, and high volume stability

Inactive Publication Date: 2011-04-06
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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Problems solved by technology

Since the CRTS I type ballastless track slab of the high-speed railway is the main and direct structure bearing the train load during train operation, its stress form is more complicated than that of the box girder, and the structure and size of its tension holes are the same as those of the prefabricated box girder. The holes are very different, so the prepared anchor material is not suitable for the anchor construction of high-speed railway CRTS I-type slab ballastless track slabs, and frequent occurrences of the anchor material being not dense, with holes, falling off, shrinkage cracking, and bonding Low strength and many other problems

Method used

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  • Low-shrink anchorage sealing material for CRTS I type ballastless track slabs of high speed railway
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  • Low-shrink anchorage sealing material for CRTS I type ballastless track slabs of high speed railway

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Embodiment Construction

[0015] The detailed description of the embodiments: the present embodiment is carried out under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0016] Low-shrinkage sealing and anchoring material for high-speed railway CRTS I type ballastless track slab, consisting of cement, expansion agent, limestone powder, metakaolin, fly ash, water reducing agent, latex powder, siliceous micropowder, reinforcing and compacting agent, sand , water according to a certain proportion, prepared by the following process: first weigh cement, expansion agent, limestone powder, metakaolin, fly ash, latex powder, silica micropowder according to the proportion, then add to the mixer and mix for 60s~ 240s; then add water reducing agent and reinforcing compacting agent in proportion and stir together for 120s ~ 300s; th...

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Abstract

The invention relates to a low-shrink anchorage sealing material for CRTS I type ballastless track slabs of a high speed railway, which is characterized by comprising the following components in proportion: 1 cement, 0.05-0.15 swelling agent, 0.1-0.3 limestone powder, 0.05-0.3 metakaolin, 0.1-0.3 coal ash, 0.01-0.05 water reducer, 0.02-0.05 emulsoid powder, 0.1-0.25 siliceous micropowder, 0.01-0.04 enhanced compacting agent, 1.0-2.0 sand, and 0.1-0.2 water. The material of the invention has the characteristics of low shrinkage rate, high compressive strength and cohesive strength, high osmosis resistance and low chloride ion content, and can be used for anchorage sealing of prestress tension holes of the CRTS I type ballastless track slabs of the high speed railway.

Description

technical field [0001] The invention relates to a low-shrinkage anchor sealing material for ballastless track slabs of high-speed railways, which is especially suitable for the treatment of anchorage ends of prestressed steel bars of CRTS I-type ballastless track slabs of high-speed railways, and can also be used for sealing prestressed steel bars of prefabricated box girders and T beams. end processing. Background technique [0002] The completion and operation of the Beijing-Tianjin Intercity Passenger Dedicated Line marks that my country's railway construction has entered a new stage, that is, a new era dominated by high-speed railway passenger dedicated lines. According to the "Medium and Long-Term Railway Network Plan (2008 Adjustment)" approved by the State Council in 2008, by 2020, my country will build 16,000km of high-speed railways with a speed of more than 250km per hour, forming the basic framework of a "four vertical and four horizontal" high-speed railway netwo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04
Inventor 谭盐宾李化建朱长华易忠来仲新华谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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