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

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...

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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

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