Method for testing water content of foamed asphalt

Abstract

The invention discloses a method for testing the water content of foamed asphalt, and relates to material testing or analysis with nuclear magnetic resonance. The water content of the foamed asphalt is measured by a nuclear magnetic resonance device. The method comprises the following steps: preparing a foamed asphalt test sample of which the water content is to be tested; setting a nuclear magnetic parameter of the nuclear magnetic resonance device; acquiring a nuclear magnetic resonance semaphore of each gram of asphalt from which impurities are removed; determining a relationship between the water content of a standard test sample and a nuclear magnetic resonance semaphore; acquiring a total nuclear magnetic resonance semaphore of the foamed asphalt test sample of which the water content is to be tested; acquiring the mass of foamed asphalt evaporation residues in the foamed asphalt test sample of which the water content is to be tested; calculating the water content of the foamed asphalt test sample of which the water content is to be tested. According to the method, the defect of incapability of a method in the prior art to measurement of the water content of the foamed asphalt and the defects of an industrial CT method, disclosed in CN103558236A, for testing the water distribution of an asphalt mixture are overcome.

Description

technical field [0001] The technical solution of the invention relates to testing or analyzing materials by means of nuclear magnetic resonance, in particular to a method for testing the moisture content of foamed asphalt. Background technique [0002] Compared with ordinary hot mix asphalt mixture, warm mix asphalt mixture can be mixed, paved and rolled under relatively low temperature conditions. Warm mix technology can be obtained mainly through the following four technical approaches, including: wax-based warm mix agent, foamed asphalt, emulsifiers and surfactants. The mixing temperature of warm mix asphalt mixture is 105°C-125°C, while the mixing temperature of ordinary hot mix asphalt mixture is 135°C-165°C, the construction temperature is significantly lower, and it is estimated that energy can be saved by 20%-30%. [0003] Compared with other warm mixing technologies, foamed asphalt warm mixing technology has obvious advantages, and this technology is still in the p...

AI Technical Summary

Problems solved by technology

The CT imaging method mainly has three defects: ①Two signal conversions (signal digital-to-analog / analog-to-digital conversion) are designed in the entire imaging process, and tiny signals may be easily lost during the digital-to-analog / analog-to-digital conversion process; ②CT imaging has precision limitations, and now The imaging accuracy is generally in the range of 10 microns, and micro-water droplets smaller than 10 microns cannot be reflected in CT imaging pictures; ③ It is necessary to measure and calculate the increased area of ​​the obtained non-void material

Images