Testing device and testing method for carbon dioxide emission quantity of warm mix asphalt mixture

Abstract

The invention discloses a testing device and testing method for carbon dioxide emission quantity of warm mix asphalt mixture, the testing device comprises a testing bottle, a bottle mouth sealing element that seals the bottle mouth of the testing bottle, a detecting tube communicated with the interior of the testing bottle and a gas sampling pump connected with the detecting tube, and the detecting tube is internally provided with a carbon dioxide concentration detecting element; the testing method comprises the following steps: I. sample making; II. determination of heating time tmax for concentration testing; III. determination of sample mass Mmax for the concentration testing; IV. determination of carbon dioxide emission concentration testing data P2: P2 is the carbon dioxide concentration emitted when the heating time of the warm mix asphalt mixture sample of mass Mmax is tmax; V. determination of carbon dioxide emission concentration P: P = P2 - P1, wherein P1 is the carbon dioxide concentration of surrounding environment. The testing device and the testing method can effectively measure the carbon dioxide emission quantity of warm mix asphalt mixture, the testing result is accurate, and the realization is convenient.

Description

technical field [0001] The invention belongs to the technical field of testing carbon dioxide emissions, and in particular relates to a testing device and a testing method for carbon dioxide emissions of warm asphalt mixtures. Background technique [0002] Since the Benhagen Conference, the era of low-carbon life has begun. As we all know, CO 2 is the main greenhouse gas, and over the past 150 years, atmospheric CO 2 content rose from 290ppm to 380ppm. Currently, hot mix asphalt (HMA) is still an important building material in transportation infrastructure in many countries including China. The production of HMA is realized by heating and mixing mineral aggregate and asphalt binder. In order to make the asphalt liquid during the mixing process, the asphalt needs to be heated to 150°C to 170°C before mixing the mixture, but high temperature will cause Rapid oxidation of bitumen and formation of high molecular weight compounds and CO 2 gas. Compared with HMA, the constru...

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Problems solved by technology

[0003] At present, a large number of studies have shown that the use of warm mix asphalt mixture can reduce the CO emitted during the production and construction of the mixture. 2 amount is reduced by at least 40%, but above CO 2 The reduction in emissions is only a rough estimate, and no method has been proposed to effectively measure CO in warm asphalt mixtures. 2 Emission test device and corresponding test method, the measured CO of warm mix asphalt mixture 2 Emissions data fluctuates greatly and test results are inaccurate

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