Multifunctional concrete structure steel bar corrosion ratio detector

Abstract

The invention relates to a multifunctional concrete structure steel bar corrosion ratio detector. The multifunctional concrete structure steel bar corrosion ratio detector is characterized in that a host is composed of a human-computer interface operation module, a data collecting, processing and storing module, a temperature, humidity and carbon dioxide measuring and sensing module and a power module; according to a composite type signal collecting device, a plurality of half-cell electrodes of the same type are designed in a disc-shaped box at equal interval to form mutual compensation circuits so that non-destruction corrosion quantitative determination can be achieved; according to the detector, the faraday's law, a linear polarization method and potentiometry are comprehensively utilized for measuring the corrosion average cross section loss ratio, the corrosion current density and the position, range and degree of a corrosion pit, and therefore a corrosion average cross section loss ratio chart and a corrosion pit position, range and degree distribution diagram are drawn; meanwhile, the temperature, humidity and carbon dioxide concentration of the environment where a concrete structure is located are measured, and the corrosion condition and corrosion trend of the concrete structure are judged scientifically and quantitatively from many aspects. The multifunctional concrete structure steel bar corrosion ratio detector can provide important bases for safety and durability quantitative evaluation of the concrete structure.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to a multifunctional concrete structure steel bar corrosion rate detector. Background technique [0002] Corrosion of steel bars in concrete structures is an important indicator affecting the remaining service life of concrete structures in service. With the rapid development of my country's infrastructure, the collapse and fracture of concrete structures due to the corrosion of steel bars has occurred frequently in recent years. The national "13th Five-Year Plan" plans to use 8 trillion yuan to leverage technological innovation, and invest a huge amount of money in related fields of engineering quality and testing for infrastructure testing, repair and maintenance, testing and certification services, technology transfer, scientific research and other related industry development . At present, traditional testing instruments have certain deficiencies or limitations in use. Research on dur...

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Problems solved by technology

[0004] After searching the existing technology, it is found that Chinese patent numbers 200810024647.2, 200810039180, 2012101136599, 2012201642083, 2012103781278, 2012205130760, 200520110540.1, patents 1 and 2 all belong to pre-embedded steel bar corrosion monitoring devices in the field of civil engineering technology. The corrosion state of steel bars, the latter can more accurately detect the corrosion degree of steel bars, but the common disadvantage of these two methods is that they are not applicable to in-service concrete structures that are not embedded in this detection device; patents 3 and 4 and patents 5 and 6 are respectively Two patents with the same content, the four patents have realized the quantitative detection of the corrosion degree of steel bars in concrete, and their test methods can detect the corrosion degree of steel bars more accurately, but the methods in these four patents are still in actual measurement. It is necessary to slightly break the concrete to expose the steel bar to be tested and connect it to one pole of the testing equipment, which still has a certain impact on the concrete and brings certain difficulties to quantitatively evaluate the corrosion degree of the steel bar; the resistivity method mentioned in patents 5 and 6 There are certain disadvantages: for example, when the water-cement ratio of concrete is very small or the concrete is in a dry state, there are very few electrolytes and pore solutions inside the concrete, which makes it difficult for ions to flow, so the ability to prevent the passage of current is strong, and the resistivity of concrete is high. , and one of the necessary conditions for the corrosion of steel bars is that there must be an electrolyte to transport ions to form a cathode-anode circuit in order to form a micro-battery. It is not perfect to directly regard the corrosion current density as the corrosion rate in Patent No. 7, because it is necessary to go through a relatively complicated conversion according to Faraday's law to convert the corrosion current density into the corrosion rate of the steel bar. loss, and the instrument mentioned in Patent No. 7 does not have the function of detecting the average section loss rate of corrosion and judging the position, scope and degree of rust pits in concrete

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