A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of Coarse Aggregate Cleanliness and Mositure Content on Asphalt Concrete Compactability and Moisture Susceptibility
Twelve field projects were studied where forty-four locations were evaluated to assess the cause or causes of asphalt concrete that exhibits tender zone characteristics (i.e. instability during compaction) and to investigate the tendency of these mixes to be susceptible to moisture damage over time. Data was collected during construction and samples were taken and used to conduct multiple laboratory tests. All field and laboratory data was used to develop multiple regression equations to predict final in place air voids and moisture susceptibility. The overall conclusion from the research was that compactability appeared to be predicted in a reasonable manner while moisture susceptibility did not. The Methylene Blue test appears promising when used in conjunction with moisture content (cold feed and mix moisture contents were measured) as a means of providing guidance for achieving higher in place density. The tensile strength ratio (TSR) test as performed in this research on laboratory compacted specimens was found to be questionable in terms of its ability to predict field moisture susceptibility.
Effects of Coarse Aggregate Cleanliness and Mositure Content on Asphalt Concrete Compactability and Moisture Susceptibility
Twelve field projects were studied where forty-four locations were evaluated to assess the cause or causes of asphalt concrete that exhibits tender zone characteristics (i.e. instability during compaction) and to investigate the tendency of these mixes to be susceptible to moisture damage over time. Data was collected during construction and samples were taken and used to conduct multiple laboratory tests. All field and laboratory data was used to develop multiple regression equations to predict final in place air voids and moisture susceptibility. The overall conclusion from the research was that compactability appeared to be predicted in a reasonable manner while moisture susceptibility did not. The Methylene Blue test appears promising when used in conjunction with moisture content (cold feed and mix moisture contents were measured) as a means of providing guidance for achieving higher in place density. The tensile strength ratio (TSR) test as performed in this research on laboratory compacted specimens was found to be questionable in terms of its ability to predict field moisture susceptibility.
Effects of Coarse Aggregate Cleanliness and Mositure Content on Asphalt Concrete Compactability and Moisture Susceptibility
K. L. Williams (author) / I. L. Howard (author) / L. A. Cooley (author)
2011
176 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Highway Engineering , Aggregates , Moisture content , Asphalts , Bituminous concretes , Stripping , Moisture damage , Crushed gravel , Mixtures , Compactability , Compaction , Adhered fines , Tensile strength , Construction materials , Laboratory tests
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