1、Designation: D4552/D4552M 10D4552/D4552M 10 (Reapproved 2016)1Standard Practice forClassifying Hot-Mix Recycling Agents1This standard is issued under the fixed designation D4552/D4552M; the number immediately following the designation indicates theyear of original adoption or, in the case of revisio
2、n, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEThe words asphalt and asphalt cement were changed editorially to asphalt binder in December 2016.1. Scope1.1
3、This practice covers a standardized method whereby petroleum product additives to be used in hot recycling of asphaltconcrete can be identified. The products are classified by viscosity in mm2/s measured at 60C 140F.60 C 140 F. Thispractice does not apply to emulsified materials.1.2 The values state
4、d in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformancenonconformance with the
5、 standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Refe
6、renced Documents2.1 ASTM Standards:2D70 Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method)D92 Test Method for Flash and Fire Points by Cleveland Open Cup TesterD140 Practice for Sampling Bituminous MaterialsD946 Specification for Penetration-Graded Asphalt Cement for Use
7、in Pavement ConstructionD1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products byHydrometer MethodD1754 Test Method for Effects of Heat and Air on Asphaltic Materials (Thin-Film Oven Test)D2007 Test Method for Characteristic Groups in Rubber
8、Extender and Processing Oils and Other Petroleum-Derived Oils by theClay-Gel Absorption Chromatographic MethodD2170 Test Method for Kinematic Viscosity of Asphalts (Bitumens)D2171 Test Method for Viscosity of Asphalts by Vacuum Capillary ViscometerD2872 Test Method for Effect of Heat and Air on a Mo
9、ving Film of Asphalt (Rolling Thin-Film Oven Test)D3381 Specification for Viscosity-Graded Asphalt Cement for Use in Pavement Construction3. Significance and Use3.1 Recycling of deteriorated asphalt pavements is being used with increasing frequency for its economy and benefit ofconserving raw materi
10、als. The objective of recycling is to reuse the two ingredients of asphalt concrete-aggregate and asphaltbinder and to restore the desired properties to the mixture. Recycling is carried out hot or cold, depending on the condition of thedeteriorated pavement, construction procedure, availability of
11、equipment, and cost. This practice is for classifying recycling agentsto be used in hot recycling.4. Classification4.1 This practice describes recycling agents (RA) as belonging to one of the following six groups: RA 1, RA 5, RA 25, RA 75,RA 250, or RA 500, as shown in Table 1. The viscosity ranges
12、are designed to avoid overlap and to provide sufficient flexibility1 This practice is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.40 on AsphaltSpecifications.Current edition approved June 15, 2010Dec. 1, 2016. Publish
13、ed July 2010December 2016. Originally approved in 1986. Last previous edition approved in 20042010 asD4552D4552/D4552M 10.92 (2004). DOI: 10.1520/D4552_D4552M-10.10.1520/D4552_D4552M-10R16E01.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serv
14、iceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version.
15、Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 1
16、00 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1to satisfy a wide range of mix proportions. Other properties specified include flash point (handling), weight percent of saturates(compatibility), selected properties of the RTF or TF oven residue (durability), and sp
17、ecific gravity.4.2 The choice of RA grade will depend on the amount and hardness of the asphalt binder in the aged pavement. In general,the lower viscosity RA types can be used to restore aged asphalts asphalt binder of high viscosity and vice versa. Additionally,grades RA1, RA5, RA25, and RA75 will
18、 generally be most appropriate for hot-mix recycling of salvaged asphalt concrete whenno more than 30 % virgin aggregate is added, while grades RA 250 and RA 500 will generally be most appropriate when morethan 30 % virgin aggregate is incorporated into the mix.5. Physical Properties5.1 All recyclin
19、g agents must be homogeneous, free-flowing at pumping temperature, and must conform to the requirementsshown in Table 1.5.2 The final acceptance of recycling agents meeting the requirements shown in Table 1 is subject to the compliance of thereconstituted asphalt blends with current asphalt specific
20、ations.6. Sampling6.1 All sampling shall be carried out in accordance with Practice D140.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination o
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24、ultiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance
25、 Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Physical Properties of Hot-Mix Recycling AgentsNOTE 1Compliance requires the asphalt binder be extracted from the pavement to be recycled and combined with the recycling agent being tested.This combination should be in acco
26、rdance with ratio of recycling agent to recovered asphalt binder used in the mix. The resulting mixture must meetall specifications for the appropriate grade within Specification D946 or Table 1, 2 or 3 of Specification D3381.TestASTMTestMethodRA 1 RA 5 RA 25 RA 75 RA 250 RA 500Min Max Min Max Min M
27、ax Min Max Min Max Min MaxViscosity 60C 140F,mm2/sD2170orD217150 175 176 900 901 4500 4501 12500 12501 37500 37501 60000Viscosity 60 C 140 F,mm2/sD2170orD217150 175 176 900 901 4500 4501 12500 12501 37500 37501 60000Flash Point, COC, C F D92 219 425 . 219 425 . 219 425 . 219 425 . 219 425 . 219 425
28、.Saturates,wt,% D2007 . 30 . 30 . 30 . 30 . 30 . 30Saturates, wt, % D2007 . 30 . 30 . 30 . 30 . 30 . 30Tests on Residuefrom RTFO orTFO oven163C 325FD2872orD1754Tests on Residuefrom RTFO orTFO oven163 C 325 FD2872orD1754Viscosity RatioA “ . 3 . 3 . 3 . 3 . 3 . 3Wt Change,% “ . 4 . 4 . 3 . 3 . 3 . 3Wt
29、 Change, , % “ . 4 . 4 . 3 . 3 . 3 . 3Specific Gravity D70orD1298Report Report Report Report Report ReportAViscosity Ratio5Viscosity of Residue from RTFO or TFO Oven Test60C f140Fg,cSTOriginal Viscosity60C f140Fg,cStViscosity Ratio5Viscosity of Residue from RTFO or TFO Oven Test60 C f140 Fg,cSTOriginal Viscosity60 C f140 Fg,cStD4552/D4552M 10 (2016)12
