HMA Specifications to Reduce Segregation and Improve ...

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Need for HMA quality 19mm Superpave Mix • Consequences of coarse & dry mixes • Compaction problems • Low density • Crushed aggregate • Segregation problems • Large dry stones roll easily • Raveling • Poor longitudinal joints
Need for HMA quality • Low bid system drives contractors to lowest cost mixes • Coarse dry mixes use lees AC – lower cost
Page 1 and 2: HMA Specifications to Reduce Segreg
Page 3: Need for HMA Quality • Prior to S
Page 7 and 8: Is there a Need for Change? • Tex
Page 9 and 10: Texas HMA Density Specifications
Page 19 and 20: Improving HMA Quality with Specific
Page 21 and 22: Improving HMA Quality with Specific
Page 23: Improving HMA Quality with Specific

HMA Specifications to Reduce Segregation and Improve ...

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