Standard Practice for Classifying Emulsified Recycling Agents

Importancia y uso:

3.1 Recycling of deteriorated asphalt pavements is being used as a routine method of maintenance and rehabilitation. Utilization of existing materials as the major component of this procedure may yield benefits in quality, economy, and preservation of natural resources. Recycling takes many forms: hot, cold, in-situ, central plant, and surface. This practice may be used for various recycling methods.

3.2 This practice describes emulsified recycling (ER) agents as belonging to three groups: ER-1, ER-2, and ER-3 as shown in Table 1. The range of recycling methods demands several emulsified recycling agents. The groups should provide adequate freedom of selection for most recycling methods.

(A) ER-1 shall be certified for dilution with potable water.(B) This specification allows a variety of emulsified asphalts. The engineer should take the steps necessary to keep incompatible materials from co-mingling in tanks or other vessels. It would be prudent to have the chemical charge nature certified by the supplier.(C) RTFO shall be the referee method. When approved by the engineer, the thin-film oven test (Test Method D1754/D1754M) may be substituted for compliance testing.

3.2.1 ER-1 is a material whose main function is to rejuvenate aged asphalt. The material is a petroleum derivative, and highly compatible with asphalts. It is classified by viscosity.

3.2.2 ER-2 and ER-3 are materials that combine rejuvenators and asphalt components in one emulsified asphalt. These soft residues are classified by low temperature penetration after aging. They are typically used in recycling where there is an increased demand for asphalt as when new aggregates are added, or where immediate cohesiveness is desired.

3.3 The choice of ER will be determined by the properties of the asphalt binder in the aged pavement, the methods of recycling planned, the amount, if any, of new aggregates, and other design needs.

Subcomité:

D04.41

Referida por:

D0008-25A

Volúmen:

04.03

Número ICS:

75.080 (Petroleum products in general), 75.100 (Lubricants, industrial oils and related products)

Palabras clave:

emulsified recycling agent; emulsified asphalt; recycling;