Micron-sized particle stacking compactness testing device and testing method thereof

Abstract

The invention discloses a micron-sized particle stacking compactness testing device and a testing method thereof, and belongs to the technical field of material science and engineering, and the testing device comprises a piston, an outer sleeve, a filter membrane, a stainless steel filter screen, a perforated sheet, a sealing washer, a perforated supporting assembly, a liquid storage assembly and a demolding device. According to the testing device, filtering media with pore diameters and strength from small to large are combined to form the filtering assembly, so that the maximum bearable stress is greatly increased while the rejection rate is ensured, and the application range is enlarged. The invention further discloses the testing method of the device, the close packing state of the particles can be accurately judged, and the packing compactness of the micron-sized particles can be tested. According to the testing device and the testing method, the problems that the influence of particle clusters cannot be completely eliminated, critical condition judgment is subjective and the like in an existing method are solved, accurate testing of the micron-sized particle stacking compactness is achieved, and prediction of the rheological property of a solid-liquid mixture, optimization of the proportion and even guarantee of the final quality of the product in actual engineering are facilitated.

Description

technical field [0001] The invention belongs to the technical field of particle packing density testing, and in particular relates to a micron-sized particle packing density testing device and a testing method thereof. Background technique [0002] The process of using particles as raw materials to prepare products is widely used in various fields, such as: concrete, ceramics, metallurgy (powder metallurgy technology), etc. The accumulation state of particles is an important parameter that affects the quality and performance of its products. Taking concrete as an example, when aggregate and cement paste are mixed, part of the cement paste will enter the gap between the aggregates and lose its lubricating effect, while the other part of the paste can lubricate the surface of the particles, improving the rheological properties of the mixture. [0003] Therefore, by reducing the porosity of the solid mixture by adjusting the morphology and particle size distribution of the agg...

AI Technical Summary

Problems solved by technology

However, the "wet method" still cannot completely eliminate the influence of particle clusters, and the judgment conditions are more subjective, and it is impossible to accurately measure the packing density of small particle size particles (especially micron-sized particles), and the test results cannot be combined with existing models. Good prediction of rheological properties of mixtures

Images