Construction method of concrete pore three-dimensional structure

Abstract

The invention provides a construction method of a concrete pore three-dimensional structure. According to the construction method, X-ray CT scanning is adopted so as to obtain rough pore three-dimensional structure images, and a concrete pore diameter distribution curve and porosity are obtained via calculation; grey value is adjusted until the pore diameter distribution curve and the porosity obtained via calculation based on the rough pore three-dimensional structure images are respectively identical to the pore diameter distribution curve and porosity obtained via mercury intrusion measuring; and finally, a critical grey value obtained via adjusting is used for modifying the rough pore three-dimensional structure images so as to obtain elaborate pore three-dimensional structure images. According to the construction method, the original resolution ratio of X-ray CT is used as far as possible, the concrete material internal elaborate pore three-dimensional structure images are constructed via combination of mercury intrusion measuring and X-ray CT scanning, a problem that it is difficult to distinguish skeleton from pores accurately only based on the concrete material internal pore three-dimensional structure images obtained via X-ray CT scanning is solved, and the concrete material internal clear pore three-dimensional structure images are obtained.

Description

technical field [0001] The invention relates to the technical field of concrete imaging, in particular to a method for constructing a three-dimensional structure of concrete pores. Background technique [0002] The pore structure of concrete has a great influence on the durability of reinforced concrete structures, and the durability of concrete has been paid more and more attention in recent years. Therefore, it is of great significance to detect the fine three-dimensional structure of the internal pore distribution of concrete. [0003] Mercury intrusion testing and CT scanning are both methods to obtain the internal pore characteristics of concrete. The former uses the characteristics of mercury entering pores of different inner diameters under different pressures to measure the inner diameter distribution of concrete pores and obtain the porosity. The latter uses the different characteristics of different substances to absorb X-rays to obtain cross-sectional scanning i...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for constructing a three-dimensional structure of concrete pores in order to overcome the technical problem of unclear imaging of the three-dimensional structure of concrete internal pores obtained by CT scanning in the prior art

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