Influence of cement on low-temperature property of granite asphalt mixtures
Combined with the application of granite asphalt mixtures in the pavement project along the Ma-Wu Expressway. In this paper, the amount of 20%, 40%, 60%, 80% cement was in equivalent replacement of common filler. The effects of cement on low-temperature property of granite asphalt mixtures were investigated by indirect tensile strength and three-point bend test, obtained the variation of cement with different admixture amounts influence on granite asphalt mixtures, than the optimum mix amount has been found. Experimental results showed that the cement additive improved the low-temperature property and the optimum mix amount of cement was 40%∼60%, which possesses guiding significance for ensuring bituminous pavement project quality.
EVALUATION OF INDIRECT TENSILE TEST (IDT) PROCEDURES FOR LOW-TEMPERATURE PERFORMANCE OF HOT MIX ASPHALT
This report presents the findings of a research project to evaluate the use of the indirect tensile creep and strength test procedures in AASHTO Standard Method of Test T322-03 in mixture and structural design methods for hot mix asphalt. The report will be of particular interest to pavement design and materials engineers in state highway agencies, as well as to materials suppliers and paving contractor personnel who are responsible for the design and evaluation of hot mix asphalt mixtures and pavements.
Electrothermal Measurements of Bridgewires Used in Electroexplosive Devices
The bridgewire of an electroexplosive device is evaluated for its thermal response to impulse energy and to square-wave power. Thermal time constant and basic electrothermal parameters can be measured from the response. These parameters are useful in the study and characterization of electroexplosive devices.