Constant loading device for testing durability of reinforced concrete

Abstract

The invention discloses a device for constantly loading pressure for testing the durability of reinforced concrete, comprising a touch screen, a controller, an electric hydraulic pump, an energy storage tank, a loading assembly, and a rapid freeze-thaw cycle instrument box, wherein, the loading assembly comprises fixed left and right baffle plates, a hydraulic jack is fixed on the inner side of one baffle plate, and a pressure sensor is fixed on the inner side of the other baffle plate, a plurality of slidable slide plates and specimen boxes comprising four-point bending backing plates and rubber boxes are parallelly arranged between the pressure sensor and the hydraulic jack, specimens are arranged in the specimen boxes; the touch screen is connected with a controller data line, the pressure sensor is connected with the controller data line, the controller is connected with an electric hydraulic pump data line, and the hydraulic jack is communicated with the electric hydraulic pump and the energy storage tank through a three-way pipe. According to the invention, real working conditions of the interaction of stress, chemical attack, dry-wet cycle or freeze-thaw cycle on a concretemember in a practical project can be simulated, thus the data obtained by laboratory tests has great value for engineering reference.

Description

technical field [0001] The invention relates to the technical field of durability tests of reinforced concrete, in particular to a loading device capable of subjecting reinforced concrete to bending loads under the coupling action of freeze-thaw cycles and salt solution erosion, and is suitable for considering the effects of multiple damage factors on reinforced concrete under load conditions The durability test test is especially suitable for the durability test and research of reinforced concrete under the coupling action of freeze-thaw cycle and salt solution erosion and bending load. Background technique [0002] The durability of reinforced concrete is closely related to its service life, and has received more and more attention in recent years. The durability of reinforced concrete materials under service conditions is a very complicated issue. In areas with frequent positive and negative temperature changes, the impact The main factors for the durability of reinforced...

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Problems solved by technology

Traditional research is limited to durability research under the action of a single factor, and the results of this single factor research cannot comprehensively and objectively reflect the durability of reinforced concrete under the coupled action of freeze-thaw cycles, salt solution erosion, and bending loads.

[0003] Therefore, in the process of studying the durability of reinforced concrete materials, how to effectively simulate the damage factors of reinforced concrete under service conditions will directly affect the authenticity and credibility of the experimental results, and ultimately affect the reliability of reinforced concrete members. The judgment of stability and service life requires a device that can simulate the service environment of reinforced concrete and perform performance measurement; in addition, existing loading devices cannot apply accurate loads, cannot guarantee long-term stability of loads, and have small loading ranges , can only be used for defects such as mortar specimens, and the process of installing specimens is also relatively cumbersome

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