Questions tagged [pavement]
The pavement tag has no usage guidance.
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Level 3 subgrade resilient modulus
Are the typical values provided in Pavement ME for Level 3 subgrade resilient modulus based on material compacted according to AASHTO T 180? I know it says they are in the note to Table 10-10. We run ...
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What's sort of "sidewalk" pavement is this?
I was recently walking down a road when a car came my way (I'm an inveterate jaywalker). I moved over to the sidewalk, only to notice it clearly wasn't a sidewalk at all. The pavement looked like this:...
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Per the ME Pavement Design Guide MOP, Section 5.3.6, Eq 5-18b, how is p02 assumed if not entered in Pavement ME?
The MOP, equation 5-18b calls for p02, which the MOP describes as the "Percent passing the 0.02 mm sieve". I assume that this is the percent passing for the subgrade. We only input down to ...
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What LOS is used by AASHTOWare ME for the traffic capacity cap option?
In AASHTOWare ME, when using the traffic capacity cap option, what is the LOS that the software assumes for this calc? Is it "F"? (Not covered in the Help function)
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What is the type of pavement defect and how to address the issue?
Attached image is from a very high water table and high salinity area. What is the type of pavement defect and how to address the issue?
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How to calculate load bearing capacity of a floating pavement?
Given tire load of a vehicle, how do I calculate load bearing capacity of a non-reinforced concrete pavement floating on a layer of heat insulation material, which is on the RC base? I can't figure ...
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What does "Percent Trucks in Design Lane" input represent?
In the AASHTO Pavement ME program version 2.6, for the traffic input "Percent Trucks in Design Lane" is the default value of 95% based on the maximum percent of trucks that can occur in the ...
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How to use MERRA data in Pavement ME Version 2.6 for rigid design?
We are testing out Pavement ME, Version 2.6 on our server, and we can't figure out how to import the MERRA Climate Data for rigid pavement designs. We have followed the steps outlined in the help ...
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Tiled/block pavement used to pave high traffic roadway?
We're normally paving the high-traffic road with concrete or asphalt. While for sidewalk/garden, we use pave block/tiles (either concrete or else)
Common reason is because pave block/tiles doesn't ...
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Why is the JPCP CTE default value in Pavement ME 4.9 when the ME Pavement Design Guide Manual of Practice recommends 5.5 for unknown?
The default value for JPCP CTE in v2.5.5 (and v2.3) is 4.9. However, per Table 10-5 on page 152 of the ME Pavement Design Guide Manual of Practice recommends 5.5 if unknown. Moreover, there is only ...
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Does Pavement ME Design output the tensile strain beneath an AC layer?
I'd like to know the tensile strain beneath the asphalt concrete (AC) layer in my design structure. Usually, the strain is used to calculate the number of axles (Nf) that the pavement structure can ...
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Pavement Mechanistic-Empirical Design application (v2.3) - Rehabilitation Flexible Calibration Factors
In v2.3 of the software, we noticed that in the rehabilitation flexible calibration tab, there are no standard deviation inputs for thermal cracking. They do appear in the new flexible rehabilitation ...
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What is the "allowable number of axle-load to failure equation" used in Pavement ME Design?
How is the allowable number of axle-load to failure equation actually used in the software? Is there any documentation regarding the calculation of the tensile strains?
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Design Roller Compacted Concrete Pavement Section
I have been asked to consider using RCC instead of traditional PCC on an upcoming project. For a rough order of magnitude estimate, can I assume that the pavement section design will be similar? I ...
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What is the influence of precipitation on pavement performance in both jointed plane concrete pavements (JPCP) and asphalt concrete pavements?
How are the integrated climatic model as discussed in Enhanced Integrated Climatic Model Version 2.0, and the thornthwaite moisture index (TMI) used to calculate erosion, suction, and frost heaving ...
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Pavement ME, Version 2.5.5 and PCC Longitudinal Cracking?
In Pavement ME, Version 2.5.5, why is there a tab for "PCC Longitudinal Cracking" calibration factors since longitudinal cracking prediction is not part of the current Pavement ME?
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k-value Rigid Pavements
Chapter 4, Part 3 of the MEPDG (Mechanistic Empirical Pavement Design Guide) states
"The 'effective' dynamic k-value represents the compressibility of all pavement layers beneath the PCC slab and ...
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How can we model a full depth reclamation (FDR) layer with emulsion (wet FDR layer) in a pavement design?
So far, I have only been able to model dry layers as I've only been able to represent the FDR layer with one modulus value.
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How can I use backcalculated modulus results from FWD testing to represent my existing condition using Pavement ME Design?
We only have one adjusted FWD modulus value for HMA layers, but I can only see input options in the form of a grid of frequency and temperature.
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How does Pavement ME Design handle climatic data?
ME Design uses hourly climate data files (HCD) as input into the pavement design algorithm. As a user I can enter an arbitrary number of years of climate data. If I enter say 30 years of climate data ...
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Why do the distress values for Pavement ME Design for alligator cracking and thermal cracking for AC pavements seem to give incorrect results?
When performing a pavement design using AASHTOWare Pavement ME for AC on AC Overlay, the pavement distress prediction for bottom-up (alligator) cracking and AC thermal cracking seem to give incorrect ...
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