Proposed Practice for Alternative Bidding of Highway Drainage Systems (2015) / Chapter Skim
Currently Skimming:
Pages 54-62
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 54... ...
54 Durability Evaluation Phase 2C of the Recommended Practice consists of durability evaluations across all available material pipe types in the user's pipe system inventory. 10.1 Overview of Approach Highway drainage pipe systems deteriorate over time due to in-service loading and environmental exposure.
|
From page 55... ...
55 Figure 26. Durability evaluation procedure.
|
From page 56... ...
56 10.2 Principles and Definitions DSL requirements are typically based on the type of highway facility and the attendant difficulty of providing repair or replacement. Failure to understand and address the potential effects of aggressive soil/effluent conditions or highly abrasive bedload can shorten the actual service life of a culvert.
|
From page 57... ...
57 full strength of the culvert installation relies heavily on the support obtained from the backfill material. Minimum cover applications must also be evaluated carefully when selecting this material.
|
From page 58... ...
58 protective coating is not particularly abrasion resistant and has been shown to provide corrosion protection primarily when the site pH is within a range of 5.5 to 8.5. Similar to galvanizing, aluminizing is the hot-dip application of a thin layer of aluminum to both sides of the steel sheet.
|
From page 59... ...
59 culvert surface. Where high velocity flows (15 ft/s or greater)
|
From page 60... ...
60 studies are available or until evaluation methods become available and widely accepted. 10.10 Other Flexible Pipe Materials The following other (i.e., non-metal, HDPE, or PVC)
|
From page 61... ...
61 care be taken during the application process. The pipe must be cleaned thoroughly and brought to an elevated temperature to ensure proper bonding to the culvert.
|
From page 62... ...
62 the quality and consistency of these repairs remains a concern for many agencies. 10.10.1.7 Concrete Coatings Primarily used with metal culverts (ASTM A 849)
|
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.