Study on Joint Deflection of Existing Joint Plain Concrete Pavement upon Adoption of Hot Mixture Asphalt Overlay

Jing Song Shan; Zhong Yin Guo

doi:10.4028/www.scientific.net/KEM.462-463.253

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 462-463Study on Joint Deflection of Existing Joint Plain...

Study on Joint Deflection of Existing Joint Plain Concrete Pavement upon Adoption of Hot Mixture Asphalt Overlay

Abstract:

When HMA (hot mixture asphalt) is used to remedy functional or structural deficiencies of existing JPCP (joint plain concrete pavement), reflection cracking is a major distress mode in HMA overlay. The basic mechanism of reflection cracking is the propagation of cracks through the overlay due to deflection difference in the joints vicinity of the existing pavements. In this paper the model of JPCP is created by three finite element method and the relationship between joint deflection difference and effects such as base modulus, elastic coefficient of spring elements is discussed. Based on the model of JPCP, the finite element model of asphalt overlay is created then and shear stress concentration phenomenon is found at the bottom of HMA where is just above the joint of JPCP. So, the rule of the shear stress at the bottom of HMA with deflection difference at the joint of JPCP is studied.

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Periodical:

Key Engineering Materials (Volumes 462-463)

Pages:

253-258

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.462-463.253

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Online since:

January 2011

Authors:

Jing Song Shan, Zhong Yin Guo

Keywords:

Asphalt Overlay, Deflection Criterion, Joint Deflection, Joint Plain Concrete Pavement, Shear Stress, Spring Element

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References

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