ASTM D4552-92(2004)

Standard Practice for Classifying Hot-Mix Recycling Agents

SIGNIFICANCE AND USE
Recycling of deteriorated asphalt pavements is being used with increasing frequency for its economy and benefit of conserving raw materials. The objective of recycling is to reuse the two ingredients of asphalt concrete-aggregate and asphalt and to restore the desired properties to the mixture. Recycling is carried out hot or cold, depending on the condition of the deteriorated pavement, construction procedure, availability of equipment, and cost. This practice is for classifying recycling agents to be used in hot recycling.
SCOPE
1.1 This practice covers a standardized method whereby petroleum product additives to be used in hot recycling of asphalt concrete can be identified. The products are classified by viscosity in centistokes measured at 140°F (60°C). This practice does not apply to emulsified materials.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Jun-2004
• ICS: 93.080.10 - Road construction
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.40 - Asphalt Specifications

Relations

• Replaces: ASTM D4552-92(1999) - Standard Practice for Classifying Hot-Mix Recycling Agents
• Effective Date: 01-Jul-2004
• Replaced By: ASTM D4552/D4552M-10 - Standard Practice for Classifying Hot-Mix Recycling Agents
• Effective Date: 15-Jun-2010
• Referred By: ASTM D8-22a - Standard Terminology Relating to Materials for Roads and Pavements
• Effective Date: 01-Jul-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4552–92 (Reapproved 2004)
Standard Practice for
Classifying Hot-Mix Recycling Agents
This standard is issued under the fixed designation D4552; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D2171 Test Method for Viscosity of Asphalts by Vacuum
Capillary Viscometer
1.1 This practice covers a standardized method whereby
D2872 Test Method for Effect of Heat andAir on a Moving
petroleum product additives to be used in hot recycling of
Film of Asphalt (Rolling Thin-Film Oven Test)
asphalt concrete can be identified. The products are classified
D3381 Specification for Viscosity-Graded Asphalt Cement
by viscosity in centistokes measured at 140°F (60°C). This
for Use in Pavement Construction
practice does not apply to emulsified materials.
1.2 This standard does not purport to address all of the
3. Significance and Use
safety concerns, if any, associated with its use. It is the
3.1 Recycling of deteriorated asphalt pavements is being
responsibility of the user of this standard to establish appro-
used with increasing frequency for its economy and benefit of
priate safety and health practices and determine the applica-
conservingrawmaterials.Theobjectiveofrecyclingistoreuse
bility of regulatory limitations prior to use.
the two ingredients of asphalt concrete-aggregate and asphalt
2. Referenced Documents and to restore the desired properties to the mixture. Recycling
is carried out hot or cold, depending on the condition of the
2.1 ASTM Standards:
deteriorated pavement, construction procedure, availability of
D70 Test Method for Density of Semi-Solid Bituminous
equipment, and cost. This practice is for classifying recycling
Materials (Pycnometer Method)
agents to be used in hot recycling.
D92 Test Method for Flash and Fire Points by Cleveland
Open Cup Tester
4. Classification
D140 Practice for Sampling Bituminous Materials
4.1 Thispracticedescribesrecyclingagents(RA)asbelong-
D946 Specification for Penetration-GradedAsphalt Cement
ing to one of the following six groups: RA1, RA5, RA25, RA
for Use in Pavement Construction
75, RA 250, or RA 500, as shown in Table 1. The viscosity
D1298 Test Method for Density, Relative Density (Specific
ranges are designed to avoid overlap and to provide sufficient
Gravity), or API Gravity of Crude Petroleum and Liquid
flexibility to satisfy a wide range of mix proportions. Other
Petroleum Products by Hydrometer Method
properties specified include flash point (handling), weight
D1754 TestMethodforEffectsofHeatandAironAsphaltic
percent of saturates (compatibility), selected properties of the
Materials (Thin-Film Oven Test)
RTF or TF oven residue (durability), and specific gravity.
D2007 Test Method for Characteristic Groups in Rubber
4.2 The choice of RAgrade will depend on the amount and
Extender and Processing Oils and Other Petroleum-
hardness of the asphalt in the aged pavement. In general, the
Derived Oils by the Clay-Gel Absorption Chromato-
lower viscosity RA types can be used to restore aged asphalts
graphic Method
ofhighviscosityandviceversa.Additionally,gradesRA1,RA
D2170 Test Method for Kinematic Viscosity of Asphalts
5, RA 25, and RA 75 will generally be most appropriate for
(Bitumens)
hot-mix recycling of salvaged asphalt concrete when no more
than 30 % virgin aggregate is added, while grades RA250 and
This practice is under the jurisdiction of ASTM
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