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Precast beam maintaining apparatus and maintaining method

A technology of prefabricated beams and curing covers, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems of unfavorable structural durability, unfavorable concrete maintenance, untimely covering maintenance, etc., achieve obvious durability effects, improve construction efficiency, and hoist convenient effect

Inactive Publication Date: 2008-08-20
CHINA RAILWAY HI TECH IND CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the whole process of prefabricated beam temperature maintenance is divided into four stages: static stop period, heating period, constant temperature period, and cooling period. The main stage of early strength development, but there will always be a constant temperature control temperature in the control is higher or lower, which is extremely unfavorable to concrete curing
The strength of the concrete develops too fast, and the strength of the concrete does not develop or even decreases in the later stage, or the temperature of the concrete rises too fast. Inside the concrete, temperature cracks appear on the surface to varying degrees, which is extremely unfavorable to the durability of the structure.
The protective device is covered with tarpaulin, the process is cumbersome and the effect is not high, resulting in untimely covering and maintenance, and it is easy to cause damage to the concrete surface during the covering process, which brings difficulties to subsequent construction

Method used

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  • Precast beam maintaining apparatus and maintaining method
  • Precast beam maintaining apparatus and maintaining method
  • Precast beam maintaining apparatus and maintaining method

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Embodiment Construction

[0025] Such as figure 1 , 2 , 3, the prefabricated beam maintenance device of the present invention comprises a curing cover composed of a steam curing scaffold 3 and a three-proof tarpaulin 2 with fire prevention, heat preservation and rainproof covering around the scaffold, the size of the curing cover and the box girder The size of the pedestal is matched, and the scaffolding includes a rigid skeleton 6. The skeleton of this embodiment is 50 meters long and 18.6 meters wide. Each unit uses 3 trusses 7 with a spacing of 2.35m and a truss height of 600mm. The upper chord is made of 14# industrial steel, the lower chord is made of 50×50×5 angle steel, and the diagonal is made of 30×30×4 angle steel. The truss is equipped with a cover plate 8 made of 50mm color steel plate with thermal insulation function, and a 60cm wide sail tarpaulin is hung around the color steel plate, which is convenient to connect and close with the canvas around the model. "Anti-proof" canvas is cover...

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Abstract

The invention relates to a curing device for a precast beam, which is characterized in that: a steaming shelf and a piece of tarpaulin covering around the shelf together form a curing shield; the shelf comprises a rigid framework and a cover plate, and a temperature control device and a humidifying device are arranged in the curing shield; the temperature control device comprises a temperature regulating device and a temperature measuring device. The invention also relates to the curing method for the precast beam, which is characterized in that: the moisture and temperature preservation curing temperature should be controlled between 30 and 35 DEG C, and water can be splashed on the concrete surface to maintain the moisture. The curing device and method for the precast beam in the invention has the advantages of convenient hoisting and mounting, small temperature difference inside and outside the concrete during curing, desirable development of the concrete strength, earlier time for removing the internal mold, faster construction speed, better construction efficiency, assurable precast quality of the box girder, and lower costs.

Description

technical field [0001] The invention relates to a prefabricated beam maintenance device and a maintenance method thereof. Background technique [0002] At present, the whole process of prefabricated beam temperature maintenance is divided into four stages: static stop period, heating period, constant temperature period, and cooling period. The main stage of early strength development, but there will always be a high or low temperature in the control, which is extremely unfavorable to concrete curing. As a result, the strength of concrete develops too fast, and the strength of concrete does not develop or even decreases in the later stage, or the temperature of concrete rises too fast, and temperature cracks appear on the surface to varying degrees inside the concrete, which is extremely unfavorable to the durability of the structure. The protective device is covered with tarpaulin, which has cumbersome procedures and low efficacy, resulting in untimely covering and maintena...

Claims

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Application Information

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IPC IPC(8): B28B11/24
Inventor 刘阳李友明晏洪陈建军郑杰元
Owner CHINA RAILWAY HI TECH IND CORP LTD
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