Simulation system and simulation method for carbonization and drying and watering circulation of concrete
A dry-wet cycle and simulation system technology, applied in the field of simulation test, can solve problems such as inability to simulate carbonization law
Inactive Publication Date: 2019-10-18
CHONGQING JIAOTONG UNIVERSITY
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[0006] In the environment of inland rivers, the river surface will change with the seasons; in the environment of reservoirs, the water level of the reservoir will also change according to seasons, scheduling and other conditions, that is, the concrete structures built in the environment of inland rivers and reservoirs will be affected by liquid and Alternate action of air, the existing carbonation simulation device can only simulate the carbonation of concrete in the air environment or soaking environment alone, and cannot simulate the carbonation of the concrete structure under the alternating action of liquid and air due to periodic changes in the liquid level. law
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[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0034] Such as figure 1 Shown is a schematic structural diagram of an embodiment of the concrete carbonation dry-wet cycle simulation system of the present invention. The concrete carbonation dry-wet cycle simulation system of this embodiment includes:
[0035] The test box 1 is used to place the concrete sample 2 to be tested;
[0036] The solution box 3 is used to hold the soaking liquid for soaking the concrete sample 2;
[0037] The gas source device 4 is connected with the test chamber 1 and is used to inject CO into the test chamber 1 2 gas;
[0038] The ventilation device 5 is connected with the test chamber 1 and is used for ventilating to make the CO in the test chamber...
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The invention discloses a simulation system for carbonization and drying and watering circulation of concrete. The simulation system comprises an experiment box body, a solution box body, an air source device and an air exchange device, wherein a to-be-tested concrete sample is placed in the experiment box body, an immersion liquid is arranged in the solution box body and is used for immersing theconcrete sample, the air source device communicates with the experiment box body and is used for injecting CO2 gas into the experiment box body, the air exchange device communicates with the experiment box body and is used for air exchange so that the concentration of the CO2 gas in the experiment box body is maintained within a setting range, the experiment box body communicates with the solution box body, and a liquid level control device is arranged between the experiment box body and the solution box body and is used for controlling a liquid level height of the immersion liquid in the experiment box body. The invention discloses a simulation method for carbonization and drying and watering circulation of the concrete. By the simulation system and the simulation method for carbonization and drying and watering circuit of the concrete, the carbonization rule of a concrete structure under an alternative effect of two states of immersion and no immersion can be simulated.
Description
technical field [0001] The invention belongs to the technical field of simulation tests, in particular to a concrete carbonation dry-wet cycle simulation system and simulation method. Background technique [0002] Concrete carbonation is a chemical attack on concrete. CO in the air 2 The gas penetrates into the concrete and reacts with alkaline substances to form carbonate and water. The process of reducing the alkalinity of concrete is called concrete carbonation, also known as neutralization. The chemical reaction is: Ca(OH) 2 +CO 2 =CaCO 3 +H 2 O. During the hydration process of cement, a large amount of calcium hydroxide is generated, which fills the voids of the concrete with a saturated calcium hydroxide solution, and its alkaline medium has a good protective effect on the steel bar, causing insoluble Fe to form on the surface of the steel bar. 2 o 3 and Fe 3 o 4 , called the passivation film. After carbonization, the alkalinity of concrete is reduced. When c...
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CPCG01N17/00
Inventor 吴林键王高林刘明维阿比尔的舒丹管理鞠学莉郭庆徐光亮
Owner CHONGQING JIAOTONG UNIVERSITY