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NIU Dong-yu, HAN Sen, LI Xing, LI Bo, REN Wan-yan. Mechanical property of asphalt mortar with additive[J]. Journal of Traffic and Transportation Engineering, 2016, 16(3): 8-16. doi: 10.19818/j.cnki.1671-1637.2016.03.002
Citation: NIU Dong-yu, HAN Sen, LI Xing, LI Bo, REN Wan-yan. Mechanical property of asphalt mortar with additive[J]. Journal of Traffic and Transportation Engineering, 2016, 16(3): 8-16. doi: 10.19818/j.cnki.1671-1637.2016.03.002
shu

Mechanical property of asphalt mortar with additive

doi: 10.19818/j.cnki.1671-1637.2016.03.002
  • 1.

    School of Materials Science and Engineering, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

  • 3.

    Department of Civil Engineering, Monash University, Melbourne 3800, Victoria, Australia

  • 4.

    School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China

More Information
  • Author Bio:

    NIU Dong-yu(1984-), male, lecturer, PhD, +86-29-82337340, niudongyu_1984@163.com

  • Received Date: 2015-12-21
  • Publish Date: 2016-06-25
    Abstract
  • By the stress-strain data of compression test, the laws of stress response, the loss indices of strength and the chemicophysical causes for influencing the mechanical properties of 70# asphalt mortar, 90# asphalt mortar, rubber asphalt mortar and their corresponding mortars with additive were studied under the normal and freezing-thawing conditions, and the physical essences of material damage and the durabilities of six kinds of mortars during the compression process were analyzed based on the principle of energy conversion and the energy index.Analysis result indicates that the maximum stresses of rubber asphalt mortar, 70# asphalt mortar and 90# asphalt mortar with additive are 1.345, 1.218 and 1.186 MPa respectively, and they are 1.12, 1.18 and 1.30 times bigger than the values of corresponding mortars without additiverespectively.The increments of energy release coefficients of rubber asphalt mortar, 70# asphalt mortar and 90# asphalt mortar with additive are 0.152, 0.067 and 0.054 MPa-1· J-1respectively, they are 68.8%, 78.8% and 41.9% of the values of corresponding mortars without additive respectively.So adding additive can improve the compressive strength and mechanical durability of asphalt mortar under the normal condition.Under freezing-thawing condition, the maximum stresses of rubber asphalt mortar, 70# asphalt mortar and 90# asphalt mortar with additive are 1.311, 1.170 and 1.083 MPa respectively, and they are 1.22, 1.11 and 1.06 times bigger than the values of corresponding mortars without additive respectively.The increments of energy release coefficients of rubber asphalt mortar, 70# asphalt mortar and 90# asphalt mortar with additive are 0.221, 0.070 and 0.073 MPa-1·J-1 respectively, and they are 61.7%, 72.9% and 65.2% of the values of corresponding mortars without additive respectively.The smaller the energy releasing coefficient is, the better the fatigue performance is.Therefore, adding additive improves the water stability, reduces the freezing-thawing damage, and ensures the mechanical properties and durability of asphalt mortar after freezing-thawing.

     

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