Factors affecting the structural response of emulsified asphalt-aggregate mixtures

An extensive laboratory study was conducted to determine the effects of several factors on the structural response of emulsified asphalt-aggregate mixtures. The major purpose of the study was to develop recommendations for mixture design procedures. Many factors are believed to influence the performance of dense graded emulsified asphalt mixtures in pavement bases, but the following were selected for evaluation in the test series: residual asphalt content, compactive effort, moisture content in compaction, curing time after compaction, and aggregate type. Other factors were also evaluated including moisture content at testing, voids (air plus moisture), total liquid content, and moisture absorbed during a special soak test. Four tests were evaluated including: modified Marshall stability, indirect tensile test resilient modulus, and a moisture absorption test.