Research on Tensile Strength Index of Anti-cracking Interlayerbetween Old Cement Pavement and Asphalt Overlay
[1]YUAN Yu-qing,LIU Feng-li,WANG Xuan-cang.Research on Tensile Strength Index of Anti-cracking Interlayerbetween Old Cement Pavement and Asphalt Overlay[J].Journal of Zhengzhou University (Engineering Science),2015,36(02):28-32.[doi:10.3969/ j.issn.1671 -6833.2015.02.007]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 02
Page number:
28-32
Column:
Public date:
2015-04-30
- Title:
- Research on Tensile Strength Index of Anti-cracking Interlayerbetween Old Cement Pavement and Asphalt Overlay
- Keywords:
- road engineering; anti-cracking interlayer; overlay; old cement pavement; tensile strength; APPmodified bituminous linoleum
- CLC:
- U416.2
- DOI:
- 10.3969/ j.issn.1671 -6833.2015.02.007
- Abstract:
- To explore tensile strength index of anti-cracking interlayer between old cement pavement and as-phalt overlay,based on the special model of APP modified bituminous linoleum reinforced the structure,me-chanical analysis,theoretical derivation and numerical simulation were put forward. Then,practical calcula-tion formula of tensile strength of anti-cracking layer was also deduced. Finally,strength index was recommen-ded. In the premise of small deformation,deflection value is proportional to crack width and elongation.Pul-ling force of anti-cracking sandwich is proportional to crack width and pavement pressure, and inverse to elon-gation. The anti-cracking interlayer with 1000 MPa modulus can obtain the best economic technology effect,when the maximum principal stress,equivalent stress and maximum shear stress are 0.59,1.02 and 0. 51MPa,respectively. In consideration of the general test methods and expression,the tensile strength of APP li-noleum should be not less than 300 N/50 mm.
- References:
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