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Assembly-type pre-stress hollow deck slab and preparation method thereof

A prestressed, hollow bridge technology, applied in the field of hollow bridge decks, can solve the problems of weak brittleness, unsuitable for production requirements, such as self-weight, etc., to improve wear resistance, improve life cycle, overcome brittle structure and poor impact resistance. Effect

Active Publication Date: 2015-09-09
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fly ash, slag, nano-calcium carbonate and nano-silicon dioxide of this invention can react with cement hydration products to form a gel, which can be filled in the voids of concrete and improve the compactness of the concrete structure, but the patent crushed stone and river Sand is the main component, so it is not suitable for the production of hollow bridge decks that require low self-weight and weak brittleness.

Method used

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  • Assembly-type pre-stress hollow deck slab and preparation method thereof
  • Assembly-type pre-stress hollow deck slab and preparation method thereof
  • Assembly-type pre-stress hollow deck slab and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] An assembled prestressed hollow bridge deck is poured with ultra-high-performance powder concrete, and the ultra-high-performance powder concrete includes the following components in parts by weight:

[0067] 800 parts of 42.5 grade ordinary Portland cement with an average particle size of 30-60 μm;

[0068] 150 parts of micro-silicon powder with an average particle size of 5-20 μm and a SiO2 content of ≥85%;

[0069] 150 parts of limestone powder with an average particle size of 10-30 μm;

[0070] 30 parts of nanometer calcium carbonate powder;

[0071] 850 parts of river sand with particle size below 1.63mm;

[0072] 18 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;

[0073] 4 parts of self-curing agent;

[0074] 175 parts of water;

[0075] 120 copper-plated fibers with an average diameter of 0.20 mm and a length of 12 to 15 mm;

[0076] 60 steel fibers with an average diameter of 0.28mm and a length of 14-18mm;

[007...

Embodiment 2

[0089] Except that the parts by weight of the components of the ultra-high performance powder concrete are different, the others are the same as in Example 1;

[0090] An assembled prestressed hollow bridge deck is poured with ultra-high-performance powder concrete, and the ultra-high-performance powder concrete includes the following components in parts by weight:

[0091] 1,000 parts of 42.5 grade ordinary Portland cement with an average particle size of 30-60 μm;

[0092] 200 parts of micro-silicon powder with an average particle size of 5-20 μm and a SiO2 content of ≥85%;

[0093] 200 parts of limestone powder with an average particle size of 10-30 μm;

[0094] 50 parts of nanoscale calcium carbonate powder;

[0095] 1000 parts of river sand with particle size below 1.63mm;

[0096] 25 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;

[0097] 6 parts of self-curing agent;

[0098] 230 parts of water;

[0099] 120 copper-plat...

Embodiment 3

[0105] Except that the parts by weight of the components of the ultra-high performance powder concrete are different, the others are the same as in Example 1;

[0106] The ultra-high performance powder concrete includes the following components in parts by weight:

[0107] 850 parts of 42.5 grade ordinary Portland cement with an average particle size of 30-60 μm;

[0108] 170 parts of micro-silicon powder with an average particle size of 5-20 μm and a SiO2 content of ≥85%;

[0109] 170 parts of limestone powder with an average particle size of 10-30 μm;

[0110] 35 parts of nanoscale calcium carbonate powder;

[0111] 900 parts of river sand with particle size below 1.63mm;

[0112] 20 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;

[0113] 4 parts of self-curing agent;

[0114] 195 parts of water;

[0115] 120 copper-plated fibers with an average diameter of 0.20 mm and a length of 12 to 15 mm;

[0116] 60 steel fibers with ...

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Abstract

The present invention discloses an assembly-type pre-stress hollow deck slab and a preparation method thereof. According to the present invention, ultra-high performance powder concrete is used to cast, suitable amounts of silicon powder and nano-scale calcium carbonate powder are added to improve impact resistance, and suitable amounts of PVA fibers and basalt fibers are added to improve wear resistance.

Description

technical field [0001] The invention relates to a hollow bridge deck, in particular to an assembled prestressed hollow bridge deck and a preparation method thereof. Background technique [0002] The prefabricated bridge deck on the bridge surface is usually constructed with ordinary concrete prefabricated or cast-in-place bridge deck, and generally adopts steel prestressed post-tensioning method for construction and connection, and the design thickness of the bridge deck is generally 200-300 mm. This traditional process mainly uses the post-tensioning method to control the stress, which often causes cracks on the deck surface. The stress control is unstable and the original tension vacancies need to be grouted. Thickening increases the self-weight of the bridge deck, so the design needs to increase the foundation of the bridge pier and the diameter of the bridge pier, etc. After opening to traffic, due to the strong brittleness of the concrete itself, it is easy to crack aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/48C04B14/38
Inventor 刘福财李斌王贻远肖敏陈桂祥李斯思孙俊阳黄贺明张信祯
Owner 黄贺明
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