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Geopolymer composite material, concrete surface strain gauge using same and preparation method

A technology of concrete surface and composite material, which is applied in electric/magnetic solid deformation measurement, cement production, electromagnetic measurement device, etc., can solve the problems of easy failure, asynchronous concrete deformation, poor weather resistance of polymer materials, etc. The effect of avoiding errors and not easy to fail

Active Publication Date: 2021-11-23
广东至道先进土木工程材料技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Traditional strain gauges use polymer materials as the covering layer and substrate. The polymer materials are generally not compatible with concrete structures, which will affect the performance of the concrete structures themselves; the weather resistance of polymer materials is poor. It is easy to fail under outdoor conditions, and it is impossible to make long-term observations on concrete structures;
[0005] 2. The traditional strain gauge is pasted on the concrete surface with an organic adhesive, which is prone to slippage and makes the measurement results inaccurate. Moreover, the organic adhesive is also prone to failure under outdoor conditions. The deformation of the strain gauge and the concrete is not synchronized, which greatly affects the measurement results, reducing the measurement accuracy of the concrete surface application meter

Method used

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  • Geopolymer composite material, concrete surface strain gauge using same and preparation method
  • Geopolymer composite material, concrete surface strain gauge using same and preparation method

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preparation example Construction

[0059] This technical solution further proposes a preparation method of a concrete surface strain gauge, which is used to prepare the above-mentioned concrete surface strain gauge, comprising the following steps:

[0060] (1) Mixing granulated blast furnace slag, fly ash and glass fiber according to the ratio to form powder;

[0061] (2) Stir the powder and the sodium base activator according to the proportioning ratio to form a composite material;

[0062] (3) The composite material is brushed on the surface of the concrete matrix 1 to be measured to form a base layer;

[0063] (4) placing the built-in electrode 3 connected with the external wire 4 on the surface of the base layer;

[0064] (5) The composite material is brushed on the surface of the base layer and the built-in electrode 3, and the concrete surface strain gauge is obtained after curing.

[0065] The technical scheme also proposes a preparation method of the concrete surface strain gauge, which has simple ste...

Embodiment 1

[0069] Embodiment 1-a kind of preparation method of concrete surface strain gauge

[0070] (1) 40 parts of S105 grade granulated blast furnace slag, 30 parts of first grade fly ash and 3 parts of glass fiber are mixed to form powder;

[0071] (2) 4 parts of powder and 2 parts of sodium silicate aqueous solution with a modulus of 3.3 and a concentration of 48% are stirred to form a composite material;

[0072] (3) The composite material is brushed on the surface of the concrete substrate to be measured to form a base layer;

[0073] (4) placing the built-in electrode connected with the external wire on the surface of the base layer;

[0074] (5) The composite material is brushed on the surface of the base layer and the built-in electrode, so that the built-in electrode is located inside the composite material, the external wire passes through the composite material and extends to the outside, and the concrete surface strain gauge is obtained after curing. Wherein, the cured c...

Embodiment 2

[0076] Embodiment 2-a kind of preparation method of concrete surface strain gauge

[0077] (1) 45 parts of S105 grade granulated blast furnace slag, 35 parts of first grade fly ash and 4 parts of glass fiber are mixed to form powder;

[0078] (2) 4 parts of powder and 3 parts of sodium silicate aqueous solution with a modulus of 3.4 and a concentration of 50% are stirred to form a composite material;

[0079] (3) The composite material is brushed on the surface of the concrete substrate to be measured to form a base layer;

[0080] (4) placing the built-in electrode connected with the external wire on the surface of the base layer;

[0081] (5) The composite material is brushed on the surface of the base layer and the built-in electrode, so that the built-in electrode is located inside the composite material, the external wire passes through the composite material and extends to the outside, and the concrete surface strain gauge is obtained after curing. Wherein, the cured c...

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Abstract

The invention discloses a geopolymer composite material, a concrete surface strain gauge using the geopolymer composite material, and a preparation method thereof. The geopolymer composite material includes powder and a sodium-based alkali activator, and according to the mass ratio, the powder and the sodium The mixing ratio of the base activator is (4-5): (2-3); according to the mass parts, the powder includes 40-50 parts of granulated blast furnace slag, 30-40 parts of fly ash and 3 parts of glass fiber ~5 servings. The geopolymer composite material proposed in this technical solution uses the geopolymer as the substrate, covering layer, adhesive and resistance of the strain gauge, which is not easy to fail during the measurement process and is conducive to long-term observation of the concrete structure. Furthermore, a concrete surface strain gauge using the above-mentioned geopolymer composite material is proposed, which has a simple structure and reliable performance, and its precision can reach submicron level. In addition, a preparation method of the above-mentioned concrete surface strain gauge is also proposed, which has simple steps and strong operability.

Description

technical field [0001] The invention relates to the technical field of semiconductor strain gauges, in particular to a geopolymer composite material, a concrete surface strain gauge using the same and a preparation method. Background technique [0002] Strain measurement on concrete surfaces is an important part of measurement operations in engineering or testing. [0003] However, the existing concrete surface strain gauges have the following problems: [0004] 1. Traditional strain gauges use polymer materials as the covering layer and substrate. The polymer materials are generally not compatible with concrete structures, which will affect the performance of the concrete structures themselves; the weather resistance of polymer materials is poor. It is easy to fail under outdoor conditions, and it is impossible to make long-term observations on concrete structures; [0005] 2. The traditional strain gauge is pasted on the concrete surface with an organic adhesive, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B12/00G01B7/16
CPCC04B12/005C04B28/006G01B7/18C04B14/42Y02P40/10
Inventor 潘一帆邝文辉孙长生张大康张玉露周光星邓波
Owner 广东至道先进土木工程材料技术研究有限公司
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