Manufacturing process for coarse aggregate active powder concrete prefabricated bridge panel

A kind of active powder and preparation technology, which is applied in the direction of clay preparation equipment, manufacturing tools, bridges, etc., can solve the problems of low shrinkage, and achieve the effects of low shrinkage, air bubble elimination and excellent durability

Active Publication Date: 2019-02-01
南京市公共工程建设中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this prefabricated construction method has higher requirements on the strength of the bridge deck. At present, the common concrete and reactive powder concrete to manufacture prefabricated bridge decks cannot meet the requirements in terms of materials and processes. A new component and new Advanced technology to meet the characteristics of high strength, high toughness and low shrinkage of prefabricated bridge deck

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiment:

[0020] A kind of coarse aggregate active powder concrete prefabricated bridge deck preparation process, comprising the following steps: a, binding bridge deck steel mesh in the mold: before the steel bars are bound, the two ends of the steel bars are wire-rolled and pre-reliably connected to the sleeve, and the steel bars The two ends connected with the sleeve are 3mm-5mm smaller than the width of the actual bridge deck at the corresponding position, and rubber gaskets are installed at the junction of the sleeve and the mold; Install the lower reinforcement mesh of the base reinforcement mesh symmetrically from the center to both sides or from both sides to the middle. The two ends of the reinforcement in the lower reinforcement mesh are fixed and tensioned with bolts and edge positioning tension plates. The tension force is 4kN±0.5kN. The lower reinforcement mesh; according...

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Abstract

The invention relates to the technical field of bridge panel manufacturing, and discloses a manufacturing process for a coarse aggregate active powder concrete prefabricated bridge panel. The manufacturing process comprises the following steps of: a, bundling a bridge panel reinforcing mesh in a mould; b, preparing materials: b1, sampling and detecting; b2, preparing coarse aggregate active powderconcrete; c, automatically distributing; d, covering the plastic film with a stripe which completes flat plate vibration; and e, curing. A prefabricated panel manufactured by the process has the characteristics of being ultra-high in strength, high in toughness, high in elastic modulus, low in shrinkage and excellent in durability; and the whole process can realize standard operation, and qualityof the prefabricated bridge panel is stable.

Description

technical field [0001] The invention relates to the technical field of bridge deck preparation, in particular to a preparation process for a prefabricated bridge deck made of coarse bone meal active powder concrete. Background technique [0002] The current bridge is formed by direct pouring of reactive powder concrete and steel bars, which has high overall strength and good compressive performance. However, there are many problems in pouring the bridge deck at the construction site, such as difficult installation of equipment and long pouring period. Therefore, in order to reduce construction Period, reduce construction cost. Currently, some bridge decks are manufactured by prefabrication. These prefabricated bridge decks can be manufactured in the factory through molds, and then transported to the bridge for construction, assembly, and connection. On the one hand, the factory manufactures , the quality is easy to control, and the inspection is convenient. On the other hand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/02B28C5/00B28B13/02B28B1/04B28B11/24E01D19/12
CPCB28B1/045B28B11/245B28B11/246B28B13/027B28B23/02B28C5/003E01D19/125
Inventor 崔冰武焕陵夏辉赵灿晖郭志明尤琦
Owner 南京市公共工程建设中心
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