Evaluation of Asphalt-Rubber Membrane Field Performance
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1982-05-01
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Edition:Interim: September 1979 - May 1982
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Abstract:This report presents a record of asphalt-rubber membrane field performance in Texas. An evaluation of performance is presented for forty-five separate projects in thirteen state highway districts. Approximately 850 lane miles of highways are represented by materials constructed as stress absorbing membranes (asphalt-rubber seal coats) and as stress absorbing membrane interlayers (asphalt-rubber seal coats beneath asphalt concrete overlay). All projects reviewed were constructed between June, 1976 and September, 1981. A field condition survey was performed at each site and data collected to ascertain pavement surface condition. Four pavement distress modes characteristics of membrane construction are reported. These include flushing, alligator cracking, shrinkage cracking and raveling. Severity of distress is reported at low, medium and high levels and is further evaluated by calculating distress deduct values for each type of distress. Projects are compared based upon variables of traffic, climate, age, length, substrate, applicator and use (seal coat interlayer). Comparisons are made with performance of asphalt-rubber seal coat and conventional seal coat construction. Data on 148 conventional seal coats throughout Texas were reviewed and a comparison of performance based on the same distress types and environmental variables as with asphalt-rubber is discussed.
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Main Document Checksum:urn:sha-512:9ecd944e46daf1f7c18cf434512e4f0cd2af985793a3b2addf1640e4300a46a3573a48f017213a08f33cf4ca4a9aea843d081e783e6061cc2c4540d9dc5dc09c
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