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Jefferson County Secondary Roads

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Mr. DeWayne Heintz, P.E.

Jefferson County Secondary Roads

Contributions

1 to 5 of 7 total

RE: Geotechnical Report and soil reports

Posted By DeWayne Heintz 09-06-2023 10:09 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
"Geotechnical Materials in Construction" by Marian & Ramond Rollings is a good reference covering many topics. ------------------------------ DeWayne Heintz P.E., M.ASCE Engineer Jefferson County Secondary Roads Fairfield IA ------------------------------

RE: Thesis for Highway/Materials Engineering

Posted By DeWayne Heintz 12-09-2020 11:14 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
Arsadie, A well designed asphalt overlay should provide 20+ years of service. I'm not sure about the rest of the U.S. but the Iowa Department of transportation utilizes an electronic reference library that can be accessed by anyone. https://iowadot.gov/erl/ IM 510 details the steps for asphalt ...

RE: Designing Sustainable Pavement

Posted By DeWayne Heintz 01-14-2019 12:15 PM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
You are experiencing the same issue that our county engineers in Iowa, USA experience. Here the weight limits are "waived" during harvest allowing grain trucks to haul as much as they can hold and "farm wagons" have no limit. My guess is that you will want to explore triage options on spot failures. ...

RE: Drainage or Permeable Layer?

Posted By DeWayne Heintz 01-04-2019 09:47 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
The total gradation of the stone is important in determining if water will percolate through the material. There must also be someplace for the water to go once it reaches the bottom of the layer or you will have created a bath tub. You need interconnected voids in the stone and sub-drains to provide ...

RE: Flexible Pavement Base Course

Posted By DeWayne Heintz 10-02-2018 11:35 AM
Found In Egroup: Horizontal/Subsurface Infrastructure & Transportation \ view thread
I'm not sure if the maximum size is as important as the gradation of the material. My experience is limited to Iowa where a 3/4" to 1" topsize material uniformly graded with 10 - 15% passing the 200 screen is a common material. A 1.5" top-size "modified granular subbase has become more popular in recent ...