Rapid Field Detection of Moisture Content for Base and Subgrade
Record Type: DOT
Water content in pavement materials plays a critical role both in construction and performance. During the construction phase, the water content influences compaction; in performance, water content significantly influences strength, modulus, and permanent deformation characteristics. While efforts exist to link design and construction by accepting compacted materials based on modulus, these efforts historically have been hindered due to the dependence of modulus on water content. For modulus-based acceptance to be implementable, companion water content measurements are necessary at the time of acceptance testing. Although the nuclear gauge can provide water content measurements in the field, restrictions and licensing requirements make the use of that gauge somewhat burdensome to agencies; test procedures are needed using rapid, accurate, non-nuclear moisture-measurement methods. To make the possibility of modulus-based acceptance an implementable reality by including nonnuclear moisture measurement, this project will: (1) Evaluate and rank non-nuclear techniques for measuring water content in soils and bases used in pavement construction. (2) Develop test procedures in the Texas Department of Transportation (TxDOT) format for measuring water content with non-nuclear methods. (3) Produce a training workshop and training materials. (4) Produce a training DVD.
Start date: 2011/9/1
End date: 2013/8/31
Status: Active
Contract/Grant Number: 0-6676
Total Dollars: 314465
Source Organization: Texas Department of Transportation
Date Added: 05/02/2012
Index Terms: Moisture content, Pavement performance, Subgrade (Pavements), Compaction, Acceptance tests, Measurement, Texas,
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Texas A&M Transportation Institute
http://tti.tamu.edu/
Texas A&M University System
3135 TAMU
College Station, TX 77843-3135
USA
Phone: (979) 845-1713
Fax: (979) 845-9356
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Sebesta, Stephen
Phone: (979) 845-9356
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