ASTM D4552-1992(2004) Standard Practice for Classifying Hot-Mix Recycling Agents《热混合循环试剂分类的标准规程》.pdf
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1、Designation: D 4552 92 (Reapproved 2004)Standard Practice forClassifying Hot-Mix Recycling Agents1This standard is issued under the fixed designation D 4552; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers a standardized method wherebypetroleum product additives to be used in hot recycling ofasphalt concrete can b
3、e identified. The products are classifiedby viscosity in centistokes measured at 140F (60C). Thispractice does not apply to emulsified materials.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this stand
4、ard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 70 Test Method for Specific Gravity and Density ofSemi-Solid Bituminous Materials (Pycnometer Method)D 92 Test Method for Fla
5、sh and Fire Points by ClevelandOpen Cup TesterD 140 Practice for Sampling Bituminous MaterialsD 946 Specification for Penetration-Graded Asphalt Ce-ment for Use in Pavement ConstructionD 1298 Test Method for Density, Relative Density (SpecificGravity), or API Gravity of Crude Petroleum and LiquidPet
6、roleum Products by Hydrometer MethodD 1754 Test Method for Effect of Heat and Air on AsphalticMaterials (Thin-Film Oven Test)D 2007 Test Method for Characteristic Groups in RubberExtender and Processing Oils and Other Petroleum-Derived Oils by the Clay Gel Adsorption ChromatographicMethodD 2170 Test
7、 Method for Kinematic Viscosity of Asphalts(Bitumens)D 2171 Test Method for Viscosity of Asphalts by VacuumCapillary ViscometerD 2872 Test Method for Effect of Heat and Air on a MovingFilm of Asphalt (Rolling Thin-Film Oven Test)D 3381 Specification for Viscosity-Graded Asphalt Cementfor Use in Pave
8、ment Construction3. Significance and Use3.1 Recycling of deteriorated asphalt pavements is beingused with increasing frequency for its economy and benefit ofconserving raw materials. The objective of recycling is to reusethe two ingredients of asphalt concrete-aggregate and asphaltand to restore the
9、 desired properties to the mixture. Recyclingis carried out hot or cold, depending on the condition of thedeteriorated pavement, construction procedure, availability ofequipment, and cost. This practice is for classifying recyclingagents to be used in hot recycling.4. Classification4.1 This practice
10、 describes recycling agents (RA) as belong-ing to one of the following six groups: RA 1, RA 5, RA 25, RA75, RA 250, or RA 500, as shown in Table 1. The viscosityranges are designed to avoid overlap and to provide sufficientflexibility to satisfy a wide range of mix proportions. Otherproperties speci
11、fied include flash point (handling), weightpercent of saturates (compatibility), selected properties of theRTF or TF oven residue (durability), and specific gravity.4.2 The choice of RA grade will depend on the amount andhardness of the asphalt in the aged pavement. In general, thelower viscosity RA
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