Details:

Creators:
Estakhri, Cindy ; Kassem, Emad ; Arambula, Edith ; Scullion, Tom ;
Estakhri, Cindy ; Kassem, Emad ; Arambula, Edith ; Scullion, Tom ; Less -
Corporate Creators:
Texas A&M Transportation Institute ;
Corporate Contributors:
Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration ;
Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration ; Less -
Subject/TRT Terms:
[+]
Acceptance Tests
Asphalt Mixtures
Cold Mix Paving Mixtures
Field Tests
Laboratory Tests
Limestone
Patching
Pavement Maintenance
Specifications
Workability

Publication/ Report Number:
FHWA/TX-15/0-6686-2 ;
Resource Type:
Tech Report ;
Geographical Coverage:
Texas ;
Corporate Publisher:
Texas A&M Transportation Institute ;
Abstract:
Limestone Rock Asphalt (LRA) mixtures have been produced and placed for several decades using specification requirements currently listed under DMS 9210. Several districts have had placement issues and premature failures at the beginning of 2010. These issues and failures have been attributed to material properties. Requirements for DMS 9210 have not changed for several years and need to be evaluated to possibly produce a higher quality material to reduce the occurrence of premature failures and to minimize placement issues. The objectives of the study are to (1) evaluate specification requirements of Item 330 and DMS 9210, (2) conduct field evaluations and lab testing to determine workability and acceptability as stockpile material for use as needed in pavement maintenance, and (3) consider improvements to the specification requirements to ensure an acceptable and workable stockpile material for up to 6 months. The Hveem stability was determined to be a good indicator of rutting resistance of LRA but it does not indicate when a mix is too dry and susceptible to raveling. The Cantabro test was able to identify dry mixtures with insufficient flux oil as well as poor quality flux oil. A Cantabro loss of 15 percent maximum is being proposed as a new specification test and limit
Format:
PDF ;
Funding:
Project 0-6686 ;
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:94436dca747fee62f12c296d73a7ea3c37a666141a55ed5ac151e856cf3eae68
File Type:

Supporting Files

• No Additional Files

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