Real environment-based concrete cracking whole process test apparatus and method

Abstract

The present invention provides a real environment-based concrete cracking whole process test apparatus and test method, a main testing machine includes an environmental tank and a concrete specimen containing device arranged in the environmental tank, a specimen is placed in the concrete specimen containing device, a load system is connected with a movable clamp head on the concrete specimen containing device, and simulated real environment is provided in the environmental tank. The method comprises restraining stress, free variables, elastic modulus, deformation separation, and creep and other tests. In the whole process from pouring to hardening of test concrete, under a variety of temperature control conditions, the self temperature stress development process includes adiabatic temperature rise, thermal expansion coefficient, elastic modulus and creep and other parameter development process over time, a real meteorological environment can also be simulated, and temperature stress and cracking mechanism affected by natural factors are simulated. The device can set, according to the needs, different temperature and constraint conditions including thermal isolation, constant temperature, setting of the temperature rise and drop processes, and the like. Through the concrete cracking whole process simulation, concrete crack resistance can be evaluated.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and relates to a real-environment-based concrete cracking whole-process test method and a test device using the method, more specifically, to a method and a device for a large-volume concrete cracking full-process simulation test. Background technique [0002] For a long time, "no dam, no crack" has been an unsolved problem in the world. The appearance, performance and safety of the dam structure are affected by the appearance of cracks, and ultimately affect people's lives and property. How to reduce or even prevent cracks has become a problem that project builders must consider. With the advancement of theoretical and technical research in related fields, the research work on dam concrete cracks has made significant progress, especially the temperature control and crack prevention of large-volume concrete. At present, a relatively complete basic theory and m...

AI Technical Summary

Problems solved by technology

The atmospheric environment not only surrounds the entire concrete project in real time, but also the vagaries of the atmospheric environment have an important impact on the project, especially the temperature, humidity, rainfall, wind speed and solar radiation of the surrounding environment, which seriously affect the generation of concrete cracks , how the influence of atmospheric environmental factors on the generation of concrete cracks, and the extent of its influence, there is no conclusion yet

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