Chemical aspects of incorporating contaminated soil into cold-mix asphalt

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:69833

Testa, S M ^[1]

---

1. Applied Environmental Services, Inc., San Juan Capistrano, CA (United States)

The chemical aspects associated with the incorporation of petroleum hydrocarbons- and metals-affected soil has been extensively studied in regards to pavement properties, leaching behavior, sensitivities to moisture-damage and function group analysis. These studies provide information that can be used to evaluate the stability of these constituents in soil that have been incorporated as an ingredient in asphalt. These studies also indicate that cold-mix asphalt incorporating contaminated soil will be highly stable and perform adequately as an end product. Maximum chemical performance is achieved when the asphalt is comprised of high contents of pyridinic, phenolic and ketone groups, which can be achieved by selectively choosing the source material. If the situation requires special stability or redundancy, small amounts of shale oil and lime can be used as additives. Situations and conditions which favor the presence of inorganic sulfur, monovalent salts and high strength solutions in the asphalt should be avoided since these conditions decrease the chemical stability of the asphalt cement by disruption of the functional group-aggregate bonds and by increasing the overall permeability. However, these conditions are not typically expected in the anticipated uses of asphalt cement to stabilize contaminants in soil using Environmentally Processed Asphalt{trademark} (EPA{trademark}) or Asphaltic Metals Stabilization{trademark} (AMS{trademark}) remedial technologies.

• OSTI ID: 69833
• Report Number(s): CONF-941189--; ISBN 1-56590-016-2
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
ASPHALTS
CHEMICAL PROPERTIES
CONTAINMENT
ENVIRONMENTAL EFFECTS
HYDROCARBONS
LAND POLLUTION
METALS
PETROLEUM
POLLUTANTS
PRODUCTION
SOILS
WASTE PRODUCT UTILIZATION