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Evaluation of Modified Asphalt Binders (Interim Report)

R. E. Reese / N. H. Predoehl

Two sites are located in hot climates and the third site is located in a cold climate. The objectives of this study are to: 1) Obtain modified asphalt binders and evaluate the aging rate and improvements in temperature susceptibility; 2) screen the modified binders using the California Tilt-Oven Durability (CATOD) Test (a procedure which simulates the effect of two years' hardening of standard asphalt in hot desert climate) for field trail use; 3) determine whether the modified binders are durable (resist property changes With aging) by trial in a hot climate and resist thermal cracking by trial in a cold climate; 4) recalibrate the CATOD procedure for modified binders if necessary. Four different polymer modified asphalt binders were used on two hot climate (at Ocotillo and Needles) test sections and one cold climate (Crestview) test section. After two years at Ocotillo and one year at Needles, the binders have age hardened approximately as predicted by the CATOD Test in that the control binder at Ocotillo has reached a 10 penetration while the polymer modified binder has virtually no hardening. No cracking or other distress is evident at any of the sites at this time.

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Evaluation of Modified Asphalt Binders (Interim Report)

R. E. Reese / N. H. Predoehl

Two sites are located in hot climates and the third site is located in a cold climate. The objectives of this study are to: 1) Obtain modified asphalt binders and evaluate the aging rate and improvements in temperature susceptibility; 2) screen the modified binders using the California Tilt-Oven Durability (CATOD) Test (a procedure which simulates the effect of two years' hardening of standard asphalt in hot desert climate) for field trail use; 3) determine whether the modified binders are durable (resist property changes With aging) by trial in a hot climate and resist thermal cracking by trial in a cold climate; 4) recalibrate the CATOD procedure for modified binders if necessary. Four different polymer modified asphalt binders were used on two hot climate (at Ocotillo and Needles) test sections and one cold climate (Crestview) test section. After two years at Ocotillo and one year at Needles, the binders have age hardened approximately as predicted by the CATOD Test in that the control binder at Ocotillo has reached a 10 penetration while the polymer modified binder has virtually no hardening. No cracking or other distress is evident at any of the sites at this time.

Evaluation of Modified Asphalt Binders (Interim Report)

R. E. Reese / N. H. Predoehl

Two sites are located in hot climates and the third site is located in a cold climate. The objectives of this study are to: 1) Obtain modified asphalt binders and evaluate the aging rate and improvements in temperature susceptibility; 2) screen the modified binders using the California Tilt-Oven Durability (CATOD) Test (a procedure which simulates the effect of two years' hardening of standard asphalt in hot desert climate) for field trail use; 3) determine whether the modified binders are durable (resist property changes With aging) by trial in a hot climate and resist thermal cracking by trial in a cold climate; 4) recalibrate the CATOD procedure for modified binders if necessary. Four different polymer modified asphalt binders were used on two hot climate (at Ocotillo and Needles) test sections and one cold climate (Crestview) test section. After two years at Ocotillo and one year at Needles, the binders have age hardened approximately as predicted by the CATOD Test in that the control binder at Ocotillo has reached a 10 penetration while the polymer modified binder has virtually no hardening. No cracking or other distress is evident at any of the sites at this time.

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Titel:

Evaluation of Modified Asphalt Binders (Interim Report)

Beteiligte:

R. E. Reese (Autor:in) / N. H. Predoehl (Autor:in)

Erscheinungsdatum:

1989

Format / Umfang:

54 pages

Medientyp:

Report

Format:

Keine Angabe

Sprache:

Englisch

Schlagwörter:

Highway Engineering , Construction Equipment, Materials, & Supplies , Flexible pavements , Asphalts , Binders(Materials) , Bituminous concretes , Aging tests(Materils) , California , Life(Durability) , Aggregates , Mechanical properties , Field tests , Hardening(Materials)

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MODIFIED ASPHALT BINDERS AND ASPHALT PAVING COMPOSITIONS

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