Questions tagged [pavement]

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3
votes
1answer
152 views

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:...
3
votes
2answers
54 views

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 ...
3
votes
3answers
78 views

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 ...
3
votes
1answer
49 views

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 ...
3
votes
1answer
69 views

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 ...
2
votes
1answer
58 views

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?
2
votes
1answer
26 views

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 ...
1
vote
1answer
66 views

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?
1
vote
1answer
27 views

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 ...
1
vote
1answer
37 views

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 ...
1
vote
1answer
40 views

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.
1
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1answer
39 views

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.
1
vote
1answer
90 views

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 ...
1
vote
1answer
90 views

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 ...
1
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0answers
26 views

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 ...
0
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1answer
64 views

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 ...
0
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0answers
17 views

Why can't ME model moisture damage in asphalt concrete? [closed]

Why can't ME Design model moisture damage in asphalt concrete?
0
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0answers
44 views

one question regarding bottom up fatigure cracking

We have uploaded PMS database with bottom-up fatigue cracking in csv. and PMED in dgpx. file into CAT program (Calibration Assistant Tool) trying to do the coefficient optimization. However, at the ...
0
votes
1answer
48 views

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 ...