Attenuation behavior of pavement concrete under rolling load and hydrodynamic pressure coupling

In addition to rolling vehicle load, the damage of hydrodynamic pressure to pavement concrete cannot be ignored. To investigate the attenuation behavior of pavement concrete under the coupling effect of rolling load and hydrodynamic pressure, an indoor-accelerated loading test was conducted. The decay rules of strength, dynamic elastic modulus, and impermeability were studied, and the correlation between pore structure and macro-properties was analyzed. The results show that hydrodynamic pressure has significant additional degradation effect on strength and dynamic elastic modulus at the later stage of loading (more than 100 thousand times). The chloride permeability coefficient increases in parabolic shape under rolling load, whereas it amplifies exponentially under the coupling of load and hydrodynamic pressure. The pore structure of pavement concrete presents a “coarsening - refining” trend under the coupling effect. The attenuation of flexural strength and dynamic elastic modulus has great correlation with the total aperture area, mean pore diameter, and area median aperture, and the chloride diffusion coefficient is greatly affected by porosity and total aperture area.

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  • English

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  • Accession Number: 01837558
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 28 2022 9:40AM