Measurements of Moisture Suction and Diffusion Coefficient in Hot-Mix Asphalt and Their Relationships to Moisture Damage

A procedure for measuring the total suction in hot-mix asphalt (HMA) mixes was developed in this study. Suction measurements were related to physical and chemical properties of HMA that influence moisture damage. This procedure was achieved in two phases. In the first phase, the total suction was measured in HMA specimens with different types of aggregates and with different air void distributions and aggregate gradations. The results showed that the drying test using a 60° C temperature-controlled room was the most appropriate setup for measuring the total suction in HMA with thermocouple psychrometers. The characteristics of suction-moisture content curves were found to be related to the air void distribution in HMA and to the resistance of the mixtures to moisture damage. In the second phase, total suction was measured in sand asphalt specimens. These specimens had different combinations of aggregates and binders that exhibited different field resistances to moisture damage. The suction measurements we...

[1]  Nicole Kringos,et al.  Raveling of asphaltic mixes due to water damage : Computational identification of controlling parameters , 2005 .

[2]  Reynaldo Roque,et al.  Evaluation of Water Damage Using Hot Mix Asphalt Fracture Mechanics , 2003 .

[3]  E. Masad,et al.  Effects of air void size distribution, pore pressure, and bond energy on moisture damage , 2006 .

[4]  D. Fredlund,et al.  Soil Mechanics for Unsaturated Soils , 1993 .

[5]  Reynaldo Roque,et al.  Performance-Based Fracture Criterion for Evaluation of Moisture Susceptibility in Hot-Mix Asphalt , 2004 .

[6]  Robert L. Lytton,et al.  Soil Suction Measurements by Filter Paper , 2001 .

[7]  Tom Scullion,et al.  Tube Suction Test for Evaluating Aggregate Base Materials in Frost- and Moisture-Susceptible Environments , 2000 .

[8]  Robert L. Lytton,et al.  Limits on Adhesive Bond Energy for Improved Resistance of Hot-Mix Asphalt to Moisture Damage , 2006 .

[9]  N. E. Edlefsen,et al.  Thermodynamics of soil moisture , 1943 .

[10]  C. Zollinger,et al.  Application of surface energy measurements to evaluate moisture susceptibility of asphalt and aggregates , 2005 .

[11]  Emad Kassem.  Measurements of moisture suction in hot mix asphalt mixes , 2006 .

[12]  Tom Scullion,et al.  Using Suction and Dielectric Measurements as Performance Indicators for Aggregate Base Materials , 1997 .

[13]  D. Fredlund,et al.  Soil Mechanics for Unsaturated Soils: Fredlund/Soil Mechanics for Unsaturated Soils , 1993 .

[14]  P. W. Mitchell.  The Structural Analysis of Footings on Expansive Soil , 1980 .

[15]  Robert L. Lytton,et al.  Effect of Moisture Damage on Material Properties and Fatigue Resistance of Asphalt Mixtures , 2004 .

[16]  R. Bulut,et al.  Free Energy of Water-Suction-in Filter Papers , 2005 .