Method for testing concrete performance under pressure stress-chemical coupling effect and device thereof

Abstract

The invention discloses a method for testing concrete performance under pressure stress-chemical coupling effect and a device thereof. The method applies a pressure stress to a test piece through a prestressing mode, and provides specific chemical corrosion action through a matched sealing device so as to apply a pull force to concrete and apply common chemical action at the same time. The internal stress of the concrete is monitored through a pressure sensor, the pressure stress is kept constant through secondary tension prestressing force, and the sealing device is arranged on the middle part of the concrete test piece to provide the chemical action, so the corrosion action of the chemical medium on a loading device is avoided; and a sealed box can provide one or more chemical erosion environments of carbonization, sulfate erosion, alkali-aggregate reaction, chloride ion erosion and corrosion. The device has a string structure, and can conveniently apply the pressure stress-chemicalcoupling effects of different conditions to a plurality of concrete test pieces.

Description

technical field [0001] The invention relates to a performance test device for concrete under the action of compressive stress-chemical coupling, in particular to a concrete performance test device which can not only keep the concrete in a state of constant pressure, but also provide carbonization, alkali-aggregate reaction, sulfate erosion, dissolution, and chlorine salt erosion. One or more chemical action methods and test devices. Background technique [0002] At present, the durability research of concrete is mostly carried out for a single chemical action, and almost all concrete structures in actual engineering are subjected to mechanical load and chemical corrosion at the same time, mechanical load will cause internal damage of concrete, and internal damage of concrete will accelerate erosion The corrosion rate of the medium can accelerate the process of chemical damage, and the chemical damage will cause the strength and stiffness of concrete to decrease, and further ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings in the prior art that the chemical corrosion characteristics of concrete cannot be studied under the continuous compressive stress state, the present invention provides a concrete performance test method and its device under the compressive stress-chemical coupling effect, which can be tested under a long-term constant pressure Test the effect of chemical corrosion on the performance of concrete under action

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