Project 0-4974
Environmental Characteristics of Traditional Construction and Maintenance Materials
Abstract
The purpose of this report is to document the findings of project number 7-4974, Environmental
Assessment of Traditional Construction and Maintenance Materials. For the purpose
of this report, traditional construction and
maintenance materials include cement, fly ash, lime, aggregate, bituminous binders,
bottom ash, RAP, and RCP, which have been used in TxDOT projects for many years. Leachate
from components of construction and maintenance materials such as cement, aggregate,
and bituminous binders were analyzed to determine the concentration of contaminants
that would be released into the environment. The analytical results were compared
to RRS2 as specified in DMS 11000. As part of this project, recommendations were made
regarding environmental standards for recycled materials. One recommendation is that
recycled material metal concentration should be equivalent to the RRS2 value or the
average detected value plus one standard deviation for the material the recycled material
is replacing.
Project PI: Audra Morse
Researchers:
Phillip T. Nash
Sanjaya Senadheera
Andrew Jackson
Center for Multidisciplinary Research in Transportation (TechMRT)
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Address
Texas Tech University, Box 41023, Lubbock, TX 79409-1023 -
Phone
806.742.3523 -
Email
techmrt.outreach@ttu.edu