A collection device and collection method for concrete pore solution

Abstract

The invention discloses a collection device and a collection method of a concrete pore solution. The collection device of the concrete pore solution comprises a peristaltic gas guide control device, a degassing and pressure buffering device, a concrete pore solution squeezing device, a filter tip, filter paper, a collection bottle, a rubber tube and a connection guide pipe. The collection method of the concrete pore solution comprises the following steps: before squeezing a concrete test piece, starting the peristaltic gas guide control device so as to facilitate air to generate flowing circulation; removing carbon dioxide in air flow through the degassing and pressure buffering device; in a pore solution collection process, forming a pressure difference state that the filter tip has positive pressure and the collection bottle has negative pressure. According to the collection device and the collection method of the concrete pore solution, carbonization-free collection of the concrete pore solution is realized, and efficient collection of the concrete pore solution is realized through a structural design of the concrete pore solution squeezing device.

Description

technical field [0001] The invention relates to the scientific field of cement and concrete materials, in particular to a collection device and method for concrete pore solution. Background technique [0002] Concrete pore solution, as an important component in the concrete system, is closely related to the performance of concrete. Related research has become an important topic in the basic theoretical research in the field of cement concrete material science, such as cement hydration, alkali-aggregate reaction, and steel corrosion. Pore ​​solution plays an important role in the mechanism research, as well as the research on the influence mechanism of cement concrete materials such as chemical additives. There are many methods to obtain or simulate the concrete pore solution, but the method of collecting the concrete pore solution by pressing has been widely recognized by scholars at home and abroad. Some intractable problems. [0003] In the process of collecting the conc...

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Problems solved by technology

[0005] Based on the above, in order to solve the following technical problems: (1) the squeezing and collection efficiency of the concrete pore solution is not high; (2) the carbon dioxide in the pore solution collection environment is difficult to completely get rid of; The collection amount of the pore solution is small, especially due to the surface tension of the water and the slight negative pressure in the collection tank, the pore solution is suspended in the collection hole and it is difficult to flow out. As a result, the amount of pore solution is small, and even the pore solution cannot be collected. On the basis of the beneficial effect of the patent ZL201420844839.9, the present invention designs a special peristaltic air guide control device and a degassing and slowing pressure device, as well as an innovative design of the hole A series of technical means such as the structure of the solution pressing device provide a collection device and method for the solution in concrete pores, which are specifically realized in this way:

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