A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Aggregate Specifications for Stone Mastic Asphalt (SMA)
Stone matrix or stone mastic asphalt (SMA) is one of the more promising mixes to come out of the European Study Tour. SMA mixes rely on a strong aggregate skeleton structure to support wheel loads and a high asphalt content to provide durability. Due to the stone-on-stone contact of property designed SMA mixes, high quality, angular, rough-textured aggregates are typically recommended. Typical specification requirements are a maximum LA Abrasion of 30 percent, however, aggregates with and LA Abrasion as high as 40 percent have been successfully utilized. The objectives of the study were to evaluate Kansas aggregates for use in SMA mixes. Aggregates were selected that have LA Abrasions of less than 30 percent, 31 to 40 percent and more than 40 percent. SMA mixes were made from the aggregates and the extracted aggregate evaluated to determine percent degradation during laboratory compaction and testing. SMA samples were tested for performance using the Asphalt Pavement Analyzer to determine rutting performance. The results were analyzed to determine the relationships between aggregate degradation and LA Abrasion.
Aggregate Specifications for Stone Mastic Asphalt (SMA)
Stone matrix or stone mastic asphalt (SMA) is one of the more promising mixes to come out of the European Study Tour. SMA mixes rely on a strong aggregate skeleton structure to support wheel loads and a high asphalt content to provide durability. Due to the stone-on-stone contact of property designed SMA mixes, high quality, angular, rough-textured aggregates are typically recommended. Typical specification requirements are a maximum LA Abrasion of 30 percent, however, aggregates with and LA Abrasion as high as 40 percent have been successfully utilized. The objectives of the study were to evaluate Kansas aggregates for use in SMA mixes. Aggregates were selected that have LA Abrasions of less than 30 percent, 31 to 40 percent and more than 40 percent. SMA mixes were made from the aggregates and the extracted aggregate evaluated to determine percent degradation during laboratory compaction and testing. SMA samples were tested for performance using the Asphalt Pavement Analyzer to determine rutting performance. The results were analyzed to determine the relationships between aggregate degradation and LA Abrasion.
Aggregate Specifications for Stone Mastic Asphalt (SMA)
S. A. Cross (author)
1999
86 pages
Report
No indication
English
Heavy duty stone mastic asphalt
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