00728394

Component

https://doi.org/10.3141/1530-09

http://scholar.google.com...anco&publication_year=1996

There are two processes of adding crumb rubber modifier (CRM) to hot mix asphalt (HMA), that is, the wet process and the dry process; and different technologies are available for each process. On the basis of the results of the binder study and producer's practices, HMA specimens were prepared using two selected AR binders with Producer R and A CRMs for Rhode Island (RI) dense-graded and dense-graded friction course (DGFC) mixtures, respectively. Aggregates procured from four local asphalt contractors were used. In addition, gap-graded HMA specimens were prepared with 3% CRM and control AC-20 binder with two typical local aggregates using the dry process. Marshall mix design was performed on all mixtures to determine optimum binder content and Marshall properties. Mechanical properties were evaluated for the mixtures with and without CRM. Superpave Level I mix design was also performed for dense-graded, DGFC, and gap-graded mixtures with aggregates procured from Contractor C. Finally, the performance of pavements with and without CRM was predicted using the computer program VESYS. Results of this study indicated that the use of CRM is feasible for RI dense-graded and DGFC mixtures utilizing the wet process.

This paper appears in Transportation Research Record No. 1530, Recycled Rubber, Aggregate, and Filler in Asphalt Paving Mixtures.

English

p. 64-71

1996

Transportation Research Record

030905902X

Figures (1) ; References (15) ; Tables (9)

Admixtures; Computer programs; Crumb rubber; Dense graded aggregates; Feasibility analysis; Forecasting; Friction course; Gap graded aggregates; Hot mix asphalt; Mechanical properties; Mix design; Pavement performance; Superpave

Dense graded mixtures; Dry process; Gap graded mixtures; Marshall mix design; Wet process

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials

TRIS, TRB

Nov 7 1996 12:00AM

• AGGREGATE POLISHING RESISTANCE PRE-EVALUATION
• ARKANSAS EXPERIENCE WITH CRUMB RUBBER MODIFIED MIXES USING MARSHALL AND STRATEGIC HIGHWAY RESEARCH PROGRAM LEVEL I DESIGN METHODS
• BABBITT, MINNESOTA: CASE STUDY OF PRETREATED CRUMB RUBBER MODIFIED ASPHALT CONCRETE
• DEVELOPMENT OF RUBBER AND ASPHALT BINDERS BY DEPOLYMERIZATION AND DEVULCANIZATION OF SCRAP TIRES IN ASPHALT
• EFFECTS OF MINERAL FILLERS ON PROPERTIES OF STONE MATRIX ASPHALT MIXTURES
• EFFECTS OF SOME AGGREGATE AND FILLER CHARACTERISTICS ON BEHAVIOR AND DURABILITY OF ASPHALT PAVING MIXTURES
• EVALUATION OF PYROLIZED CARBON BLACK FROM SCRAP TIRES AS ADDITIVE IN HOT MIX ASPHALT
• EVALUATION SYSTEMS FOR CRUMB RUBBER MODIFIED BINDERS AND MIXTURES
• HOT MIX ASPHALT RUBBER APPLICATIONS IN VIRGINIA
• INVESTIGATION OF STONE MATRIX ASPHALT MORTARS
• QUANTITATIVE ANALYSIS OF AGGREGATE BASED ON HOUGH TRANSFORM
• SHORT-TERM AND LONG-TERM AGING BEHAVIOR OF RUBBER MODIFIED ASPHALT PAVING MIXTURE
• USE OF SCRAP TIRE CHIPS IN ASPHALTIC MEMBRANE