Factors Affecting Neutron Gauge Calibration
Neutron gauge characteristics and soil chemistry affect gauge calibration. External factors also influence gauge calibration and should be considered in the calibration procedure. Gauge...
Recognition and Avoidance of Details That Adversely Affect the Performance of Exposed Wood Members
Factors that affect the deterioration of wood in structures are reviewed. Important points regarding wood-moisture relationships are noted. The requirements for decay of wood by fungi...
Water Sensitivity of Asphalt Paving Mixtures
There are two mechanisms by which moisture can degrade the integrity of an asphalt concrete matrix: (a) loss of cohesive strength and stiffness in the asphalt film and (b) the failure...
Effect of Lime on Asphalt Concrete Pavement Performance
In the early to mid 1980's, the Federal Highway Administration constructed 15 experimental field test sections in four states designed to investigate mitigating moisture damage...
Environmental Considerations in the Design of Asphalt Concrete Paving Mixtures
The design of asphalt concrete mixtures is largely based on two empirical mixture design methods. These are 'Marshall' and 'Hveem',...
Methods for Determining Actual Evapotranspiration in Plots
The major methods used at INRA since 1965 for determining actual evapotranspiration (AET) in plots are reviewed in this paper. These procedures involve either direct determination (weighing...
The Alaskan Arctic Coast: Wetland or Desert?
Deserts can be defined by low precipitation and lack of water. The Alaskan Arctic coast receives approximately 18 cm (7 in. ) of precipitation annually and for 8 months of the year there...
Lessons Learned From Examination of Membrane Roofs in Alaska
During 1984 and 1985 airborne infrared roof moisture surveys were conducted of membrane roofs at Army installations in Alaska. Many of these roofs were also visually inspected and cored...
Moisture Effects on Extruded Polystyrene Insulation
The amount of moisture within the insulation was determined by carefully weighing each sample and then measuring its volume. Two methods of measuring thermal conductivity were used. The...
Interrelating Infiltration Measurements
Field measurements of infiltration rates are frequently used to index environmental conditions, soil hydrology, and the potential for rainstorm response. However, the variety of methods...
Design of Concrete-Faced Rockfill Dams
Design principles adopted in 1966 by the Hydro-Electric Commission have been applied to nine concrete-faced rockfill dams and remain substantially unchanged. Experience shows that the...
Pavement Recycling: Stopgap or Remedy?
Recycled pavements cost less than new asphalt concrete overlays, but no long term data has ratified how recycled pavements' strength and durability compare to virgin material....
Modeling the Drying of Dredged Material
The drying of dredged material was modeled mathematically as a diffusive process and the governing equation was solved using an integral method. Closed form solution equations are presented...
Rx�Treated Lumber & Metal + Corrosion Ailments
The use of metal elements in contact with fire-treated lumber requires special precautions. It is a problem that has not received much attention in the literature directed to the design...
Nuclear Testing of Utility Trench Backfill
For many years, Westchester County municipalities were resigned to the fact that compaction of utility trenches could not be done satisfactorily and that settlement and road failure would...
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