MPC-459 April 1, 2014- July 31, 2017 Project Title: Comparison between 1993 AASHTO Pavement Design Guide and Mechanistic-Empirical Pavement Design Guide with North. Mix Type Selection Pavement type selection processes are used by pavement authorities such as state highway agencies to identify the most beneficial type of pavement.
- Descriptions of concluded and on-going geosynthetics research projects, conducted in cooperation with commercial contractors. Includes related publications.
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- PDF Portable Document Format. PDRC Pavement Design and Rehabilitation Committee.
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- Chapter 1610 Traffic Barriers WSDOT Design Manual M 22-01.13 Page 1610-3 July 2016.
AASHTO Rigid Pavement Structural Design. Empirical equations are used to relate observed or measurable phenomena with outcomes. Therefore, environmental factors were difficult if not impossible to extrapolate out to a longer period. The loads used to develop the equations were operating vehicles with identical axle loads and configurations, as opposed to mixed traffic. For JPCP and JRCP, all transverse joints were the same spacing. JPCP was 4. 6 m (1.
JRCP was 1. 2. 2 m (4. Alltransverse joints used dowel bars. All PCC was of the same mix design and used the same aggregate and portland cement. In order to apply the equations developed as a result of the AASHO Road Test, some basic assumptions are needed: The characterization of subgrade support may be extended to other subgrade soils by an abstract soil support scale.
Loading can be applied to mixed traffic by use of ESALs. Material characterizations may be applied to other surfaces, bases, and subbases by assigning appropriate values. The accelerated testing done at the AASHO Road Test (2- year period) can be extended to a longer design period. When using the 1. AASHTO Guide empirical equation or any other empirical equation, it is extremely important to know the equation’s limitations and basic assumptions. Madden 10 Wii Rapidshare Library. The modulus of rupture (S’c) is typically obtained from a flexural strength test. Slab depth. The number of ESALs a rigid pavement can carry over its lifetime is very sensitive to slab depth.
As a general rule, beyond about 2. Drainage coefficient. Rigid pavement is assigned a drainage coefficient (Cd) that represents the relative loss of strength due to its drainage characteristics and the total time it is exposed to near- saturation moisture conditions.
Condition. J Factor. Undoweled PCC on crushed aggregate surfacing. Doweled PCC on crushed aggregate surfacing. Doweled PCC on HMA (without widened outside lane) and tied PCC shoulders. CRCP with HMA shoulders. CRCP with tied PCC shoulders. Modulus of subgrade reaction.
It also supplies some basic information on variable descriptions, typical values and equation precautions.