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Precast ultra-high-performance concrete steel bridge deck pavement structure and preparation method

An ultra-high performance, concrete technology, used in bridges, bridge parts, bridge construction, etc., can solve problems such as difficult flatness control, rivet welding damage, etc., to achieve reliable pavement quality, improve toughness, and delay fatigue damage.

Active Publication Date: 2020-01-21
JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a prefabricated ultra-high performance concrete steel bridge deck pavement structure and preparation method, to reduce fatigue cracking of steel bridge deck pavement, overcome rivet welding damage in the prior art, and ultra-high performance concrete construction steel bridge deck For problems such as difficult control of flatness and long construction period affecting traffic operation, the full bonding method of high-toughness resin contact surface can be used to reinforce the steel bridge deck and avoid stress damage to the steel plate caused by conventional welded rivet connections. The mechanical properties of the pavement are improved, and it is also convenient for the maintenance and repair of the pavement layer

Method used

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  • Precast ultra-high-performance concrete steel bridge deck pavement structure and preparation method
  • Precast ultra-high-performance concrete steel bridge deck pavement structure and preparation method

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preparation example Construction

[0059] The prefabricated ultra-high performance concrete steel bridge deck pavement structure and preparation method in the embodiment of the present invention include the following steps:

[0060] S1. Use threaded ribbed steel bars with a diameter of 8-10mm to make steel mesh sheets, set the horizontal and vertical steel bar spacing to 50-100mm, place them in a fixed mold to form high-density fiber concrete prefabricated panels, and control the thickness of the steel mesh protective layer by welding trapezoidal steel bars. ~20mm;

[0061] S2. Weigh 25-30 parts of Portland cement, 6-10 parts of silica fume, 8-12 parts of quartz powder, 30-35 parts of quartz sand with particle size ≤ 1mm, 2-4 parts of composite chopped steel fiber and 4-8 parts of basalt fiber, 8-12 parts of water, 1-2 parts of polycarboxylate high-efficiency water reducer, use a horizontal mixer to stir the dry mixture at a rate of 25-35 rpm for 1 min, and then add basalt fiber and steel fiber, then add water...

Embodiment 1

[0072] A prefabricated ultra-high performance concrete steel bridge deck pavement structure and a preparation method thereof, comprising the following steps:

[0073] S1. Use threaded ribbed steel bars with a diameter of 8mm to make steel mesh sheets, set the horizontal and vertical steel bar spacing to 50mm, place them in a fixed mold to form high-density fiber concrete prefabricated panels, and control the thickness of the steel mesh protective layer by welding trapezoidal steel bars to 20mm;

[0074] S2. Weigh 25 parts of Portland cement, 8 parts of silica fume, 12 parts of quartz powder, 35 parts of quartz sand with particle size ≤ 1mm, 4 parts of composite chopped steel fiber, 6 parts of basalt fiber, 8 parts of water, Carboxylic acid high-efficiency water reducer 2 parts, use a horizontal mixer to stir the dry mixture at a rate of 35 rpm for 1 minute, add basalt fiber and steel fiber in turn, then add water reducer and mixing water, and wet mix for 8 minutes to prepare ne...

Embodiment 2

[0090] A prefabricated ultra-high performance concrete steel bridge deck pavement structure and a preparation method thereof, comprising the following steps:

[0091] S1. Use threaded ribbed steel bars with a diameter of 10mm to make steel mesh sheets, set the horizontal and vertical steel bar spacing to 75mm, place them in a fixed mold to form high-density fiber concrete prefabricated panels, and control the thickness of the steel mesh protective layer by welding trapezoidal steel bars to 15mm;

[0092] S2. Weigh 27 parts of Portland cement, 10 parts of silica fume, 10 parts of quartz powder, 33 parts of quartz sand with particle size ≤ 1mm, 3 parts of composite chopped steel fiber, 5 parts of basalt fiber, 10 parts of water, and Carboxylic acid high-efficiency water reducer 2 parts, use a horizontal mixer to stir the dry mixture at a rate of 35 rpm for 1 minute, add basalt fiber and steel fiber in turn, then add water reducer and mixing water, and wet mix for 6 minutes to pre...

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Abstract

The invention relates to the technical field of steel bridge deck pavement, in particular to a precast ultra-high-performance concrete steel bridge deck pavement structure and a preparation method. The precast ultra-high-performance concrete steel bridge deck pavement structure sequentially comprises, from bottom to top, a steel slab base layer, a high-toughness resin waterproof bonding layer withthe thickness of 5-10 mm, a high-density fiber concrete precast pavement layer with the thickness of 4-6 cm and an epoxy gravel antiskid wearing layer with the thickness of 3-5 mm. The high-density fiber concrete precast pavement layer consists of high-density fiber concrete precast slabs; the high-density fiber concrete precast slabs internally comprise sparsely-distributed reinforcing mesh; each of the high-density fiber concrete precast slabs is provided with grouting holes and hole bottom dispersion openings in advance; opposite sides of each of the high-density fiber concrete precast slabs are equipped with a locking groove and a locking fastener; and the bottoms of the precast slabs are provided with high-elastic cushion rubber during pavement of a steel bridge deck. The precast ultra-high-performance concrete steel bridge deck pavement structure and the preparation method utilize a high-toughness resin contact surface full bonding manner, and can reinforce the steel bridge deck, thereby avoiding the stress damage to steel slabs caused by conventional welding rivet connection, improving mechanical properties of the pavement structure layer, and facilitating later maintenanceand repair of the pavement layer.

Description

technical field [0001] The invention relates to the technical field of steel bridge deck pavement, in particular to a prefabricated ultra-high performance concrete steel bridge deck pavement structure and a preparation method. Background technique [0002] Orthotropic steel bridge decks are prone to fatigue cracking and pavement damage due to their own structural characteristics, long-term driving loads, and temperature changes. Ultra-high-performance concrete has good fatigue durability and resistance to deformation under load, which can increase the stiffness of steel bridge decks and play a certain role in reinforcement; when used as steel bridge deck pavement materials, it is often passed on steel bridge deck Welding shear rivets to achieve an effective connection with the steel bridge deck. However, when welding rivets, it will cause a certain degree of damage to the steel bridge deck and cause a greater safety hazard, and the setting of the studs will also cause seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/12C09J163/00C09J11/08C09J11/04
CPCC09J11/04C09J11/08C09J163/00E01D19/125C08L9/02C08K3/36C08L71/00
Inventor 张志祥张辉潘友强陈李峰罗瑞林崔磊关永胜
Owner JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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