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A kind of RPC cover plate of tunnel cable trench and preparation method thereof

A tunnel cable and cover plate technology, applied in the field of building materials, can solve the problems of limiting the use of cable trench RPC cover plates, demanding impermeability requirements, low tensile strength, etc., achieving fewer defects, increased fluidity, and improved strength Effect

Active Publication Date: 2022-04-26
JIANGXI LONGZHENG SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application of reactive powder concrete in engineering structures can solve the shortcomings of current high-strength and high-performance concrete such as insufficient tensile strength, high brittleness and poor volume stability, and can also solve the problems of high investment and easy corrosion of steel structures
The existing tunnel cable trench RPC cover plate has low strength, poor stability and poor durability, the surface is prone to cracks, and the impermeability requirements are relatively strict, which limits the use of cable trench RPC cover plate

Method used

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  • A kind of RPC cover plate of tunnel cable trench and preparation method thereof
  • A kind of RPC cover plate of tunnel cable trench and preparation method thereof
  • A kind of RPC cover plate of tunnel cable trench and preparation method thereof

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preparation example Construction

[0044] The preparation method of the tunnel cable trench RPC cover plate in the above-mentioned embodiment comprises the following steps:

[0045] (1) Add cement, mineral powder, fly ash, quartz sand, modified steel fiber, flame retardant, modified rubber particles and osmotic crystallizer into the mixer and mix at a speed of 255r / min for 15 minutes, then Add water reducer and water, stir evenly to get concrete slurry;

[0046] (2) Inject the concrete slurry into the mold, let it stand at room temperature for 5 hours, and then put it into the curing room with a temperature of 20°C and a relative humidity of 95% or more. Steam is introduced and the temperature is raised at a rate of 10°C / h until When the temperature reaches 35°C, take it out after curing for 20 hours, and cool it at room temperature;

[0047] (3) After the specimen is removed from the mold, it is moved into a high-temperature curing room, and the temperature is slowly and uniformly raised to 300°C within 6 hou...

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Abstract

The invention provides a tunnel cable trench RPC cover plate and a preparation method thereof. The cover plate comprises the following components in parts by weight: 100-200 parts of cement, 150-200 parts of mineral powder, 100-120 parts of fly ash, 2 ‑26 parts of quartz sand, 1‑3 parts of modified steel fiber, 0.2‑0.8 part of water reducer, 0.3‑0.5 part of flame retardant, 0.1‑0.4 part of penetrating crystallizer, 0.5‑1 part of modified rubber particles and 120‑ 200 parts of water; the specific dosage of the modified steel fiber in the present invention is designed according to the flexural strength, so that the strength of the concrete is significantly improved, and the test piece is cracked and not scattered when it is damaged, and the ductility is good, so the thin and short steel fiber improves The bending strength of concrete is improved, thereby effectively overcoming the high brittleness of ordinary concrete; the invention can effectively reduce the self-weight of the structure cover plate, and improve the durability, fire resistance, high strength and high toughness of the structure cover plate, etc. features.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a tunnel cable trench RPC cover plate and a preparation method thereof. Background technique [0002] Reactive powder concrete slabs are composed of high-strength cement and admixtures, and can be widely used in cable duct covers, steel structures and stair treads in construction projects, and are the focus of engineering materials. The application of reactive powder concrete in engineering structures can solve the shortcomings of current high-strength and high-performance concrete such as insufficient tensile strength, high brittleness, and poor volume stability. It can also solve the problems of high investment and easy corrosion of steel structures. The existing tunnel cable trench RPC cover plate has low strength, poor stability and poor durability, and the surface is prone to cracks, and the impermeability requirements are relatively strict, which limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B20/02C04B14/48C04B111/27
CPCC04B28/04C04B20/023C04B14/48C04B2201/50C04B2111/27C04B18/141C04B18/08C04B14/06C04B2103/302C04B2103/63C04B18/22C04B22/10C04B12/04
Inventor 容七英
Owner JIANGXI LONGZHENG SCI & TECH DEV
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