Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays (2010) / Chapter Skim
Currently Skimming:
Pages 1-4
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 1... ...
mechanistic-based models for predicting reflection cracking in HMA overlays of flexible and rigid pavements and (b) associated computational software for use in mechanisticempirical procedures for overlay design and analysis.
|
From page 2... ...
These appendices are not published herein but they are available on the NCHRP Report 669 summary web page at http://www.trb.org/Main/ Blurbs/163988.aspx. Research Approach A single model that uses fracture mechanics as its basis is sufficient for the analysis of reflection cracking for different overlay types.
|
From page 3... ...
The fracture properties of the overlay mixture are derived from the input properties and the complex moduli neural network algorithms. The design method does not require laboratory tests of the crack growth in a mixture; it allows the user to try numerous variations of a mixture to determine which has the best resistance to reflection cracking.
|
From page 4... ...
A detailed discussion of the S-shaped curve and examples from the field data that were analyzed in this project is provided in Chapter 2, the section entitled "Reflection Cracking Amount and Severity Model." Appendix L shows how to determine the ρ-value from field data, and makes it possible for a user to develop a set of calibration coefficients. By inserting a set of calibration coefficients into the software, an agency can develop a regional or local version of the overlay analysis model.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.