6 results about "Degradation test" patented technology

The invention relates to the technical field of packaging film degradation testing, and discloses a testing device for detecting degradation performance in degradable flexible packaging film production, which comprises a main body and an outer cylinder. When the soil is pushed by the first arc-shaped rings, the compactness between the soil can be weakened through sliding of the first arc-shaped rings, pores between the soil can be increased, by reducing the thickness and looseness of the soil around the thin film, carbon dioxide generated when the thin film is degraded can be promoted to penetrate through the thin soil to rapidly rise, and therefore the soil can be degraded. Furthermore, the retention time of the carbon dioxide in the soil can be shortened, the accuracy of the infrared carbon dioxide sensor in detecting the carbon dioxide concentration and the degradation performance is improved, and the accuracy in degradation detection and the subsequent detection efficiency are improved.

The application relates to the field of environmental protection, and discloses a degradation analysis device for biodegradable materials, which comprises a test module and a detection module; the test module is provided with a test box, a temperature control assembly, a sprayer and a temperature and humidity pressure sensor; the test box is provided with a containing space and an air inlet communicated with the containing space; the detection module is provided with a filter grid, a condensing device, a C 14 detector and a greenhouse gas detector. The test box can accurately simulate various different environments, the experimental efficiency can be improved through the environmental factors, the best test effect is achieved, the problem of a long natural degradation period of biological materials is solved, the defects of the prior art, i.e. only considering single-factor degradation test and single greenhouse gas release, are solved, the environmental influence of biological carbon and fossil carbon is distinguished, and the test result is more accurate.

Degradation tests of objects are conducted in extreme environments such as the stratosphere. [Solution] One aspect of the present disclosure is a degradation testing apparatus for testing the degradation of a sample, comprising: a sealed container; a sample holding unit for holding the sample in the sealed container; a light source unit for irradiating the sample with light; and a concentration adjustment unit for reducing the number of oxygen molecules in the sealed container to less than the number of oxygen molecules in an atmospheric pressure environment. The concentration adjustment unit controls the number of oxygen molecules in the sealed container to be 5.11 × 10^21 or less when converted to a volume of 1 liter, and the light source unit emits light including wavelengths of 300 nm or less.

The invention discloses a rock mass chemical-dry-wet cycle coupling degradation test device and method and a response model.The test device comprises a cabin body, a cabin plate used for blocking the cabin body is detachably arranged at the bottom of the cabin body, and a sample to be tested is placed on the cabin plate; a spray head for spraying a chemical solution to a sample and a heating device for drying the sample are arranged at the top in the cabin body, a fan for air-drying the sample is arranged on the side wall in the cabin body, and an observation window for conveniently observing the condition of the sample is also formed in the side wall of the cabin body; the device has the beneficial effects that a high-simulation coupling environment is provided, precise atomization and programmed drying are combined, high-precision coupling simulation of two degradation factors of chemical corrosion and physical dry and wet in time, space and strength is realized, and a field environment is reflected more truly.

The application belongs to the technical field of geotechnical test, and particularly discloses a rock mass degradation test system for simulating dynamic water level change and a test method, the system comprising a uniaxial hydraulic servo control subsystem, a waterproof plate lifting subsystem, a water flow control subsystem, a drying subsystem, a temperature control subsystem and an acoustic subsystem; the uniaxial hydraulic servo control subsystem comprises a servo hydraulic pump and a core holder; the waterproof plate lifting subsystem comprises a waterproof plate and a lifting assembly; the water flow control subsystem comprises a circulating water storage tank, a constant pressure and flow water pump, a third check valve, a flowmeter and a fourth check valve; the acoustic subsystem measures the dynamic elastic modulus of the rock mass by emitting ultrasonic pulses and receiving reflected P and S waves, so as to realize real-time dynamic characterization of the damage degree in the rock degradation process. The application can simulate the rock degradation scene under complex environmental conditions, especially under dynamic water level change conditions, and realize simulation of the damage inside the rock mass under the in-situ stress state.

The invention provides a concrete material testing method for a high-cold high-altitude environment, which comprises the following steps: in a simulated high-cold high-altitude low-air-pressure environment, carrying out low-temperature detection type loading on a concrete sample with a preset water-containing initial state, setting at least three temperature setting points in a low-temperature range covering freezing-unfreezing change, acquiring performance response readings to form a response sequence; determining a unique effective temperature interval and a change center temperature based on the response change; a first phase change loading path and a second phase change loading path are constructed, the starting and ending temperatures of the two paths are the same, all set points are located in the interval, and the staying duration difference of the two paths is not smaller than a preset time threshold value; after the two paths are executed respectively, residual performance response is collected, and an equivalent degradation test conclusion is calculated. According to the method, the phase change sensitive area and the degradation characteristics of the concrete in the extreme environment can be accurately identified, and the comparability and the engineering applicability of a test result are improved.