A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Effects of Contaminants in Bitumen - Aggregate Mixtures
The principal objectives of this research were to determine the effects contaminants have on various Alaskan aggregate's stripping characteristics and to compare the AASHO T-182 test method of quantitatively determining the degree of asphalt retention with the tracer salt procedure adopted by ASTM and later modified by the California Highway Department. The aggregates chosen represent the broad spectrum of those now used for paving throughout the State. The bitumens employed in this investigation are those most commonly designated by the State for paving purposes and they include asphalt cement, cutback asphalt and an emulsified asphalt. The products elected as contaminants were chosen on the basis of their probability of occurrence in aggregates used for asphalt pavements. This study includes both advertent and inadvertent contamination, (coal, diesel fuel, sea water, Portland cement, light oil, and an anti-stripping agent.) The results of this research indicate that contamination may retard stripping or have no adverse effects upon bitumen-aggregate mixtures when the contamination amounts to no more than one percent of the mixture. (BPR abstract)
The Effects of Contaminants in Bitumen - Aggregate Mixtures
The principal objectives of this research were to determine the effects contaminants have on various Alaskan aggregate's stripping characteristics and to compare the AASHO T-182 test method of quantitatively determining the degree of asphalt retention with the tracer salt procedure adopted by ASTM and later modified by the California Highway Department. The aggregates chosen represent the broad spectrum of those now used for paving throughout the State. The bitumens employed in this investigation are those most commonly designated by the State for paving purposes and they include asphalt cement, cutback asphalt and an emulsified asphalt. The products elected as contaminants were chosen on the basis of their probability of occurrence in aggregates used for asphalt pavements. This study includes both advertent and inadvertent contamination, (coal, diesel fuel, sea water, Portland cement, light oil, and an anti-stripping agent.) The results of this research indicate that contamination may retard stripping or have no adverse effects upon bitumen-aggregate mixtures when the contamination amounts to no more than one percent of the mixture. (BPR abstract)
The Effects of Contaminants in Bitumen - Aggregate Mixtures
R. W. Head (author) / W. E. Duncan (author)
1968
35 pages
Report
No indication
English
Civil Engineering , Pavements , Mixtures , Contamination , Asphalt , Bituminous coatings , Tracer studies , Salts , Cements , Test methods , Coal , Colloids , Oils , Quantitative analysis , Photometers , Alaska , Aggregates(Materials) , Portland cements
Effects of Contaminants on Aggregate-Bitumen Mixtures
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