Preparation method of hollow slab beam for bridge

A technology for hollow slab girders and bridges, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as corrosion, and achieve the effects of improving comprehensive performance, excellent mechanical properties, good strength and stiffness

Active Publication Date: 2015-09-23
山东聚源玄武岩纤维股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a method for preparing a hollow slab girder for a bridge. The hollow slab girder prepared by the preparation method replaces the steel bar with basalt fiber bars, fully utilizes the excellent performance of basalt fibers, and can not only solve the problem of steel bar corrosion It can also improve the strength and other properties of the hollow slab girder, thereby improving the performance and service life of the hollow slab girder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A method for preparing a hollow slab girder for a bridge, comprising the following steps:

[0027] 1) Using several basalt fiber connecting rings to connect several basalt fiber reinforcements into a basalt fiber reinforcement cage;

[0028] 2) Install the outer template and the core template, and smear the release agent on the outer template and the core template, then place the basalt fiber reinforcement cage obtained in the step 1) in the space between the outer template and the core template cavity;

[0029] 3) pouring concrete into the cavity;

[0030] 4) curing the concrete;

[0031] 5) The outer formwork and core formwork are removed to obtain a hollow slab girder.

[0032]The invention provides a method for preparing a hollow slab girder for a bridge. A basalt fiber reinforcement cage is used as the skeleton of the hollow slab girder instead of a steel reinforcement cage. Since the basalt fiber reinforcement is made of basalt fiber and a binder, the basalt fi...

Embodiment 1

[0052] 1) controlling the mass percentage of basalt fiber with a diameter of 0.6 μm to 0.9 μm in the raw material to be 60%, and the mass percentage of basalt fiber with a diameter of 3 μm to 5 μm to be 40%, processing the above basalt fiber into basalt fiber yarn, and then The basalt yarn is processed into a basalt fiber rod-shaped fabric with a network structure; the inner surface of the mold is sprayed with silicone oil, and the above-mentioned basalt fiber rod-shaped fabric is placed in the mold; then filled with epoxy resin powder in the basalt fiber rod-shaped fabric, wherein the mass percentage is 70% The particle size of the epoxy resin powder is greater than or equal to 325 mesh; the mold starts to heat, melts the epoxy resin powder into a liquid, and then keeps the epoxy resin liquid at 220°C for 20 minutes; after the heat preservation is completed, The heating of the mold is stopped, the epoxy resin liquid cools and solidifies naturally, then the mold is removed to o...

Embodiment 2

[0061] 1) Control the mass percentage of basalt fiber with a diameter of 0.6 μm to 0.9 μm in the raw material to be 65%, and the mass percentage of basalt fiber with a diameter of 3 μm to 5 μm to be 35%, process the above basalt fiber into basalt fiber yarn, and then The basalt yarn is processed into a basalt fiber rod-shaped fabric with a network structure; the inner surface of the mold is sprayed with silicone oil, and the above-mentioned basalt fiber rod-shaped fabric is placed in the mold; then the basalt fiber rod-shaped fabric is filled with phenolic resin powder, wherein the mass percentage is 75% The particle size of the epoxy resin powder is greater than or equal to 325 mesh; the mold starts to heat, melts the phenolic resin powder into a liquid, and then heats the phenolic resin liquid, the heat preservation temperature is 240 ° C, and the heat preservation time is 30 minutes; after the heat preservation is completed, the mold stops heating , the phenolic resin liquid...

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Abstract

The invention discloses a preparation method of a hollow slab beam for a bridge. A basalt fiber reinforcement cage replaces a reinforcement cage and serves as a framework of the hollow slab beam, the problem of reinforcement corrosion is solved, and the mechanical property, the physical property and high-temperature stability of the hollow slab beam are improved. Basalt fiber reinforcements are connected into a stereoscopic basalt fiber reinforcement cage framework by a basalt fiber connecting ring, basalt fiber connectors do not deform or collapse and are simple in structure, convenient and rapid, binding or welding is omitted, connectors made of second materials are not led in, practicability of the basalt fiber reinforcement cage is improved, the service performance of the hollow slab beam is improved, and the service life of the hollow slab beam is prolonged.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a method for preparing a hollow plate girder for a bridge. Background technique [0002] Hollow slab girder is one of various types of bridge span structures in bridge engineering. It is made of poured concrete with a steel cage as the skeleton and a hollow core structure inside to fully reduce the self-weight of the hollow slab girder. The steel cage is made of several steel bars bundled or welded. The steel bars are generally ordinary carbon steel with average acid and alkali resistance. After a long period of use, they will gradually corrode, resulting in a gradual decrease in the mechanical properties of the steel bars and gradually losing their skeleton functions. The corrosion products accumulated in the connection between the steel bar and the concrete destroy the tight connection between the steel bar and the concrete, thereby reducing the strength and other pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/00B28B1/30E04C5/07E01D2/00
CPCB28B1/14B28B1/30B28B23/00B28B23/0006E01D2/00E01D2101/266E04C5/07E04C5/073
Inventor 杨岩林漓张中海
Owner 山东聚源玄武岩纤维股份有限公司
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