A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bulk Specific Gravity of Compacted Bituminous Mixtures: Finding a More Widely Applicable Method
AASHTO T-166 Standard Specification for Bulk Specific Gravity of Compacted Bituminous Mixtures Using Saturated Surface Dry Specimens, often referred to as the SSD method states, 'This method should not be used with samples that contain open or interconnecting voids and/or absorb more than 2% of water by volume.' As the percentage of voids accessible from the compacted specimen surface increases, water penetrates further into the specimen. Water penetration into compacted hot-mix asphalt (HMA) samples introduced only small errors in percent air voids determination when dense-graded, well-compacted HMA mixtures were used exclusively. However, design innovations such as Superpave, stone matrix asphalt (SMA), open-graded friction courses (OGFC) and large-stone mixes (LSM) as well as construction problems such as inadequately compacted conventional HMA mixtures have made the limitations of AASHTO -166 more apparent. The ultimate goal of the project was to develop a new method, or adapt a current method, for determining bulk specific gravity (G(sub mb)) of compacted HMA mixtures with wide applicability. The method must be repeatable and applicable to laboratory or field specimens for a wide variety of mixture types.
Bulk Specific Gravity of Compacted Bituminous Mixtures: Finding a More Widely Applicable Method
AASHTO T-166 Standard Specification for Bulk Specific Gravity of Compacted Bituminous Mixtures Using Saturated Surface Dry Specimens, often referred to as the SSD method states, 'This method should not be used with samples that contain open or interconnecting voids and/or absorb more than 2% of water by volume.' As the percentage of voids accessible from the compacted specimen surface increases, water penetrates further into the specimen. Water penetration into compacted hot-mix asphalt (HMA) samples introduced only small errors in percent air voids determination when dense-graded, well-compacted HMA mixtures were used exclusively. However, design innovations such as Superpave, stone matrix asphalt (SMA), open-graded friction courses (OGFC) and large-stone mixes (LSM) as well as construction problems such as inadequately compacted conventional HMA mixtures have made the limitations of AASHTO -166 more apparent. The ultimate goal of the project was to develop a new method, or adapt a current method, for determining bulk specific gravity (G(sub mb)) of compacted HMA mixtures with wide applicability. The method must be repeatable and applicable to laboratory or field specimens for a wide variety of mixture types.
Bulk Specific Gravity of Compacted Bituminous Mixtures: Finding a More Widely Applicable Method
L. K. Crouch (author) / D. A. Badoe (author) / M. Cates (author) / T. A. Borden (author) / A. R. Copeland (author)
2003
260 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Highway Engineering , Specific gravity , Bituminous materials , Hot-mixed paving asphalts , Flexible pavements , Aggregates , Bitumens , Open graded friction , Density(Mass/Volume) , Air voids , Air content , Compaction , Standards , Road materials , Design , Pavement surfaces
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