Continuous measuring device and method for ammonia gas releasing amount in concrete

Abstract

The invention, which relates to the technical field of ammonia gas detection, discloses a continuous measuring device for the ammonia gas releasing amount in concrete, thereby solving a problem of theexisting device cannot continuously absorb and measure ammonia gas in concrete. The device comprises a data acquisition system, an experimental box, an ammonia gas absorption device, an air supply system, a temperature control system and an automatic ammonia concentration detection system. The data acquisition system is a host computer; and the two ends of the data acquisition system are respectively connected with the temperature control system and an automatic ammonia gas concentration detection system. In addition, the invention also discloses a continuous measuring method for the ammoniagas releasing amount in concrete. According to the invention, the vibration and hardening process of concrete is simulated by regulating the environmental conditions of the temperature and wind speedin the experiment box, thereby realizing real-time detection of the ammonia gas releasing amount in the whole process of concrete pouring and maintenance and thus filling the blank of the ammonia gasreleasing amount detection method in the concrete pouring process.

Description

technical field [0001] The invention relates to the technical field of ammonia gas detection, in particular to a device and method for continuously measuring ammonia gas release in concrete. Background technique [0002] The utility model patent with the application number "CN201720324604.0" and the publication number "CN206618714U" discloses a device for measuring the amount of ammonia released over time in concrete. The sample container, the air outlet of the blower is connected to the air inlet of the sealed box through the ventilation hose, the air outlet of the sealed box is connected to the upper end of the air inlet pipe set on the glass washing bottle through the air hose, and the lower end of the air inlet pipe is inserted into the Into the absorption solution contained in the glass washing bottle, the glass washing bottle is also provided with an outlet pipe communicating with the outside air and an ammonia gas-sensitive electrode for measuring ammonia gas, and the...

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Problems solved by technology

[0006] 3. The ammonia gas-sensing electrode can only measure the ammonia concentration in the solution under alkaline conditions, but the absorption liquid in the invention of "a device for measuring the amount of ammonia released over time in concrete" has always been in acidic conditions, so it cannot be measured in practice The concentration of ammonia in it; and if the absorption solution in this invention is replaced by alkaline conditions, the concentration can indeed be measured, but the measured value is almost zero because the alkaline solution cannot absorb the released ammonia gas

To sum up, there are systematic errors in the invention of "a device for measuring the amount of ammonia released over time in concrete". Either the ammonia concentration in the absorption liquid cannot be measured, or the measured ammonia concentration is almost zero, and a correct test cannot be obtained. data

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