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Simple method for simulating influence of natural humidity on performance of asphalt mixture

A technology for the performance of asphalt mixture, which is applied in the field of road engineering, can solve the problems of lack of qualitative and quantitative description of humidity, and the inability to describe the performance attenuation of asphalt mixture, etc. The simulation method is simple, easy, widely applicable, and highly operable Effect

Active Publication Date: 2015-02-25
北京国道通公路设计研究院股份有限公司
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Problems solved by technology

[0003] The main factors affecting the natural environment are temperature and humidity. The role of temperature is generally valued, but there are few studies on humidity, and there is no qualitative and quantitative description of the role of humidity. The simulation test method of the action effect, the existing technology cannot describe the performance attenuation of the asphalt mixture under the long-term action of the ambient humidity

Method used

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  • Simple method for simulating influence of natural humidity on performance of asphalt mixture
  • Simple method for simulating influence of natural humidity on performance of asphalt mixture
  • Simple method for simulating influence of natural humidity on performance of asphalt mixture

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Embodiment

[0024] The asphalt mixture samples (see Table 2 for the composition of the asphalt mixture) were selected to be cured for one year (360 days) in Beijing, and the shear strength, splitting strength and dynamic stability of the asphalt mixture samples were regularly observed. changes (see Figure 1 ~ Figure 3 ), the study found that the performance of asphalt mixture was the lowest at 90 to 210 days, and the three performances dropped the most at 20%±5%.

[0025] Table 2 Composition of asphalt mixture

[0026]

[0027] Use a constant temperature water bath box as a simulated environment box, set up a closed temperature and humidity environment at a water bath temperature of 60°C, when the temperature of the closed environment reaches 52-53°C, and the absolute humidity of the closed environment reaches 103-104g / m 3 When the asphalt mixture sample is sealed in the simulated environment box, when the asphalt mixture sample is added, the absolute humidity inside the asphalt mixt...

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Abstract

The invention relates to a simple method for simulating influence of natural humidity on performance of an asphalt mixture. The method comprises the following steps: setting a closed temperature and humidity environment at a water bath temperature of 60 DEG C by using a thermostatic waterbath as a simulating environmental box; when the closed environmental temperature reaches 52-53 DEG C and the absolute humidity of the closed environment reaches 103-104g / m<3>, sealing an asphalt mixture sample in the simulating environmental box; when the asphalt mixture sample is added, the absolute humidity inside the asphalt mixture sample is stabilized at 40+ / -0.5g / m<3>, preserving for 90-120 hours; and then taking out the asphalt mixture sample to carry out high-temperature stability, flexural performance, anti-shearing performance tests. Corresponding performance of the asphalt mixture sample is attenuated to realize the degree of influence of air humidity in a year in a natural environment.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a simple method for simulating the influence of natural humidity on the performance of asphalt mixture. Background technique [0002] The influence of the natural environment on the performance of asphalt pavement has been widely concerned. In the prior art, the research on the influence of the environment on the performance of asphalt pavement is usually to carry out the environmental influence on the asphalt mixture for a certain period of time through the indoor simulation environment, and then detect its various performance indicators. Attenuation condition. At present, some progress has been made in the influence of natural environment on the performance of asphalt mixture at home and abroad, but the common deficiencies in the prior art are: [0003] The main factors affecting the natural environment are temperature and humidity. The role of temperature is generally valued, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B40/00
Inventor 于海臣高小钧刘晓姗
Owner 北京国道通公路设计研究院股份有限公司
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