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Concrete-filled steel tube

A technology for steel pipe concrete and concrete regeneration, applied in the field of steel pipe concrete, can solve the problems of uneven distribution, damage, and detachment of steel pipe reinforcement effects, and achieve the effects of reducing local weak points, good fluidity, and good thixotropy

Inactive Publication Date: 2019-03-22
陕西天石实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the concrete will shrink during the curing process, the steel pipe concrete injected into the steel pipe will be partially separated from the inner wall of the steel pipe after curing, resulting in uneven distribution of the reinforcement effect on the steel pipe, resulting in local weak points of the steel pipe, which in turn makes the Steel pipes are prone to damage from weak points, so there is still room for improvement

Method used

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  • Concrete-filled steel tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of steel tube concrete, is made by following steps:

[0055] (1) Add 100kg of optically active polytrityl methacrylate and 45kg of silane coupling agent into the kneader, raise the temperature to 165°C, and stir at constant temperature for 180s to form a premix;

[0056] (2) Add 326kg of Portland cement, 16kg of water reducer and 175kg of water into the first stirring tank at a rotating speed of 80r / min, and stir for 10min to form cement slurry;

[0057] (3) Add 50kg of acetone in the second stirred tank, cool the premix to room temperature and then add it into the second stirred tank at a speed of 40r / min, and stir until the premix is ​​completely dissolved to form a premix solution;

[0058] Then add the premix solution into the cement slurry in the first stirred tank, and stir with a rotating speed of 120r / min through the first stirred tank, and stir for 15 minutes to stir evenly;

[0059] (4) Add 20kg of cobalt salt, 22kg of fumed silica and 40kg of expansion ...

Embodiment 2

[0070] A kind of steel tube concrete, is made by following steps:

[0071] (1) Add 102kg of optically active polytrityl methacrylate and 46kg of silane coupling agent into the kneader, raise the temperature to 165°C, and stir at constant temperature for 180s to form a premix;

[0072] (2) Add 326kg of Portland cement, 17kg of water reducing agent and 175kg of water into the first stirring tank at a rotating speed of 80r / min, and stir for 10min to form cement slurry;

[0073] (3) Add 51kg of acetone in the second stirred tank, cool the premix to room temperature and then add it into the second stirred tank at a speed of 40r / min, and stir until the premix is ​​completely dissolved to form a premix solution;

[0074] Then add the premix solution into the cement slurry in the first stirred tank, and stir with a rotating speed of 120r / min through the first stirred tank, and stir for 15 minutes to stir evenly;

[0075] (4) Add 22kg of cobalt salt, 23kg of fumed silica, and 44kg of ...

Embodiment 3

[0086] A kind of steel tube concrete, is made by following steps:

[0087] (1) Add 106kg of optically active polytrityl methacrylate and 48kg of silane coupling agent into the kneader, raise the temperature to 165°C, and stir at constant temperature for 180s to form a premix;

[0088] (2) Add 326kg of Portland cement, 18kg of water reducing agent and 175kg of water into the first stirring tank at a rotating speed of 80r / min, and stir for 10min to form cement slurry;

[0089] (3) Add 53kg of acetone in the second stirred tank, cool the premix to room temperature and then add it into the second stirred tank at a speed of 40r / min, and stir until the premix is ​​completely dissolved to form a premix solution;

[0090] Then add the premix solution into the cement slurry in the first stirred tank, and stir with a rotating speed of 120r / min through the first stirred tank, and stir for 15 minutes to stir evenly;

[0091] (4) Add 24kg of cobalt salt, 24kg of fumed silica and 48kg of e...

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Abstract

The invention relates to the technical field of concrete materials, and provides a concrete-filled steel tube to solve the problem that a steel tube has local weak points. The concrete-filled steel tube is characterized by being prepared from the following components in parts by mass: 320 to 350 parts of Portland cement, 60 to 70 parts of fly ash, 55 to 65 parts of slag powder, 40 to 50 parts of an expansion agent, 1,665 to 1,695 parts of a concrete regeneration filler, 16 to 19 parts of a water reducing agent and 20 to 25 parts of cobalt salt. Due to the addition of the expansion agent, the volume expansion caused by the expansion agent during solidification of the concrete-filled steel tube counteracts the volume shrinkage generated by the concrete-filled steel tube during the solidification to reduce the separation of the concrete-filled steel tube from the inner wall of the steel tube and reduce the occurrence of the local weak points of the steel tube; the concrete regeneration filler is used to reduce waste of used concrete and reduce the treatment cost of concrete regeneration.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a steel tube concrete. Background technique [0002] Concrete filled steel pipe is to pour concrete into the steel pipe and compact it to increase the strength and rigidity of the steel pipe. [0003] Since the concrete will shrink during the curing process, the steel pipe concrete injected into the steel pipe will be partially separated from the inner wall of the steel pipe after curing, resulting in uneven distribution of the reinforcement effect on the steel pipe, resulting in local weak points of the steel pipe, which in turn makes the Steel pipes are prone to breakage from weak points, so there is still room for improvement. Contents of the invention [0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a concrete filled steel tube, which has the advantage of uniform reinforcing effect. [0005] To achieve the...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B24/26C04B24/42C04B18/08C04B2103/302C04B24/008C04B2103/0013C04B14/06C04B2103/0068C04B18/141C04B18/16C04B40/0028
Inventor 刘鹏张峰
Owner 陕西天石实业有限责任公司
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