Accession Number : ADA188331

Title :   Asphalt-Aggregate Interactions in Hot Recycling.

Descriptive Note : Final rept. Apr 85-Mar 87,

Corporate Author : NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE

Personal Author(s) : Kiggundu, Badru M ; Newman, J K

PDF Url : ADA188331

Report Date : Jul 1987

Pagination or Media Count : 114

Abstract : This report summarizes results of an investigation of asphalt aggregate interactions in hot recycled systems. Materials used in the research included a severe stripping aggregate and a nonstripping aggregate. Both were evaluated using the Lottman 70 percent retained tensile strength criteria. Additional materials included a 40/60 RAP new aggregate system, one virgin asphalt, two RAP recovered binders, one modifier or recycling agent, and two blends. The modifier was selected using a recently developed specification involving physical, composition, and solubility properties. Aggregates were evaluated for surface area, bulk composition, water soluble ions, cation exchange capacity, gradation, and specific gravities. Binders were tested for physical properties and composition properties using a modified Clay-Gel procedure, and compatibility properties using a modified Heithaus procedure. Keywords: Asphalt aggregate interactions, Hot recycling, Reclaimed asphalt pavement (RAP), Aged binders, Modifier, Recycling agent, Recycled blends, Heithaus, Compatibility, Clay-Gel composition, Adsorbed surface ions, Water soluble ions, Aggregates, Surface area, Porosity, Dry tensile strength, Wet tensile strength, Dry resilient modulus, Wet resilient modulus, Tensile strength ratio, Resilient modulus ratio, Microcalorimetry, Bond energy, Correlation, Recycling guidelines.

Descriptors :   *ASPHALT, *RECYCLED MATERIALS, *AGGLOMERATES, ADSORPTION, BINDERS, CATIONS, COMPATIBILITY, DRY MATERIALS, HIGH TEMPERATURE, INTERACTIONS, ION EXCHANGE, IONS, MICROCALORIMETRY, MIXTURES, PAVEMENTS, PHYSICAL PROPERTIES, POROSITY, RATIOS, RESILIENCE, SOLUBILITY, STRENGTH(MECHANICS), SURFACES, TENSILE STRENGTH, WATER, WET STRENGTH, LIMESTONE, GRANITE

Subject Categories : Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE