LABORATORY METHODS FOR ESTIMATING THE MOISTURE SUSCEPTIBILITY OF BITUMINOUS PAVEMENTS. THE INFLUENCE OF TEST PARAMETERS

LABORATORIEMETODER FOER BEDOEMNING AV BITUMINOESA BELAEGGNINGARS VATTENKAENSLIGHET. INFLYTANDET AV OLIKA FOERSOEKSPARAMETRAR

An experimental study was carried out to "optimize" two selected laboratory methods for estimating the moisture susceptibility of bituminous pavements. "Optimization" implies determination of the effect of a number of test parameters on the results of the analysis. The methods are named "rolling flask method" and "indirect tensile test". The rolling flask method involves mixing evenly graded aggregate with bitumen. The bitumen-coated stones are stored overnight at room temperature and then placed in special glass flasks filled with water. Flasks containing the samples are rolled at room temperature, normally for three days. The degree of coverage is then estimated visually. In the indirect tensile test, Marshall specimens are manufactured. Half the number of test samples are saturated with water and are then stored in water for a given time. The rest of the specimens are stored dry. The specimens are brought to the particular test temperature, normally 10 deg C, and are then subjected to compression according to a predefined procedure, whereupon fracture load can be recorded. The tensile strength of the test sample is calculated from the value for the fracture load. The ratio between the tensile strength of the wet and dry test samples can be regarded as a measure of the resistance of the corresponding pavement to attack by moisture. Nineteen test parameters were investigated in all. (TRRL)

• Corporate Authors:

  Swedish National Road Administration

  Nordic Road Association, Roda Vagen
  S-78187 Borlaenge,   Sweden 
• Publication Date: 1983

Language

• Swedish

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 91 p.

Subject/Index Terms

• TRT Terms: Aggregates; Bituminous materials; Bituminous pavements; Evaluation and assessment; Failure; Laboratory tests; Loads; Moisture content; Optimization; Strength of materials; Tensile properties; Tension tests; Test procedures
• Uncontrolled Terms: Indirect tensile test; Susceptibility; Tensile
• Old TRIS Terms: Rolling flask method
• ITRD Terms: 4577: Aggregate; 4955: Bituminous materials; 9020: Evaluation (assessment); 5520: Failure; 5567: Load; 5920: Moisture content; 5928: Sensitivity; 5544: Strength (mater); 5502: Tension; 6288: Test method
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00387520
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: 1983:11 Monograph
• Files: ITRD, TRIS
• Created Date: Aug 30 1984 12:00AM