United States Department of Transportation
i
A Study of Moisture Induced Material Loss of Hot Mix Asphalt (HMA)
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2017-10-31
[PDF-1.93 MB]
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Alternative Title:Technical Report 17-09 : A Study of Moisture Induced Material Loss of Hot Mix Asphalt (HMA)
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Abstract:Maine Department of Transportation has noticed the partial or complete loss of material within 2-3 years of construction in the traffic wheel path in the presence of moisture in few of their mixes. Regularly used moisture susceptibility tests are unable to detect the problem during mix design. The obvious reason is that the currently available tests are not appropriate – or more precisely, either the conditioning or the test or both are not appropriate. So, a research study was initiated to understand and characterize the mixes that are susceptible to moisture induced material loss. The objectives of the research were as follows: 1. To identify and evaluate a test method that can be used on a regular basis to detect moisture susceptible mixes 2. To simulate moisture induced loss of materials in mixes in the laboratory This work identifies a methodology to characterize the moisture susceptible mixes and also to identify and evaluate the loss of material. The report includes: 1. the main study that was conducted to characterize the moisture susceptible mixes with the proposed methodology. 2. a study to understand moisture induced material loss of Hot Mix Asphalt with the use of system dynamics modeling. 3. a framework to evaluate moisture susceptibility of Hot Mix Asphalt.
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