1、m 900927b 003L3bB 167 m AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Rem St.,PhikMphi,Pa.19103 Rapprinted hom tim Annuel Boak of AmM Smnders.Copvripht ASTM If not lined in the current mmbnd index,will appear in the next dition.Standard Test Method for EMULSIFIED ASPHALT/JOB AGGREGATE COLD MIX TES
2、T This standard is issued under the hed dc8giiption D 4379;the number immediately fdowing the designation indicates the year of onginai adoption or,in the case of revision,the year of last revision.A number in parentheses i n d i c a m the year of laa reapproval.A supekpt epsilon(e)indicates an edit
3、orial change Sirnt thc last m o n or rtapproval.1.scope 1.1 This test method may be wed to identify the adequacy of slow setting grade of emulsified asphalt to mix with and coat a dense and f i n e-graded job aggregate.It i s a laboratory test method of screening emulsion candidates for mixing with
4、and coating job aggregates and i s not to be construed as a mix design test method.i.2 This standard may involve hazmdm ma-terials,operations,and equipment.This standard does not purport to address all of the safay prob lems associated with its use.It is the responsibil-ity o f whoever uses this sta
5、ndard to consult and established appropriate safity and health prac-tices and determine the applicability of rquhtoty limitations prior to use.2.Applicable Documents 2.1 ASTM Standards:D 8 Definitions of Terms Relating to Materiais D244 Method of Testing Emulsified Asphalts*D698 Test Method for Mois
6、ture-Density Re-lations of Soils and Soil-Aggegak Mixtures,Using 5.5-lb(2.49-kg)Rammes and 12-in.(304.8-mm)Drop3 D1073 Specification for Fine Aggnqg&for Bituminous Paving Mixture2 2.2 AASHTO Standard:T-99 Moisture/Densi#for Roads and Pavements*3.Significance and Use 3.1 The conditions of test are de
7、signed to identify the adequacy of emulsified asphalt,slow-setting grade(CSS-D2397 and SSD977)for mix-ing with and coating dense-graded aggregate and fine-graded aggregate.4.Summary of Method 4.1 A weighed amount of dry job aggregate is hand-mixed with a weighed amount of water for p e t t i n g the
8、 aggregate.The wetted aggregate is then hand-mixed with a weighed amount of emulsified asphalt of known asphalt cement con-tent until maximum coating of the job aggregate i s obtained.(Mix time is usually 15 to 120 s.)The adequacy of emulsified asphalt for mixing with job aggregate is determined by
9、using various amounts of water and emulsified asphalt until a maximum coating of the job aggregate is ob-tained.This coating is rated as good,fair,or Poor.5.A Q .P u s 5.1 Containers-A 1000-mL glass beaker,a Iqt(1.0-L)friction-top metal can,or 1000-mL stainless steel beaker or bowl.5.2 Mixing TmI-A
10、steel spatula or its equiv-aient,having a blade approximately 8 in.(203.2 mm)in length.5.3 Balance,capable of weighing loo0 g to within 10.1 g.6.Rocedure 6.1 Weigh 300 g of dry job aggregate into the container and add water basis dry weight of aggregate.immediately begin to mix vigorously for 1 min
11、or until all aggregate surfaces subjec-tively appear to be wetted(as a guide,2 to 8%water for dense-graded aggregate and 4 to 12%water for fine-graded aggregate).The natural niis tcst method is under the jurisdiction of ASTM Com-m i e -4 on Road and Paving Mamiais and i s the dinct responsibility of
12、 Subcommittee Do4.42 on Emulsified Asphalt T e o t a Current edition approved Sept.11,1984.Published Decem-ber 1984.Annual iwk of ASTM Stanauds,Vol 04.03.Annual Book of ASTM standardi,Vol 04.08.Available from Amakan Association of State H i g h w a y and Transportation Olciais,444 N.Capitol,Washingt
13、on,Dc uxw)I.I NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.moisture in a job aggregate may be used in the test if predetermined.Additional water may then be added,if necessary,to obtai
14、n the desired level of water to be used for prewetting the aggregate.6.2 Add the emulsion and immediately begin to mix vigorously,scraping sides and bottom of container,for 15 to 120 s or until maximum coating has been attained(as a guide,basis dry weight of aggregate,3 to 7%Asphalt Cement(A/C)resid
15、ue for dense aggregate and 4 to 8%A/C residue for fine aggregate).Example:8%emulsion at 60%solids would be equivalent to 4.8%asphalt cement residue in the mix.6.3 If mix appears to be too dry and insufi-ciently coated repeat 6.1 and 6.2,using an in-creased amount of water or emulsified asphalt,or bo
16、th.if mix appears to be too wet from excessive water or emulsified asphalt,or both,repeat 6.1 and 6.2 using less water or emulsified asphalt,or both.6.4 For each job aggregate mix observe and 9009276 00333b9 OT3=D 4379 record the amount of aggregate prewetting water and asphalt cement residue from the emulsified asphalt and note the one mix which provides the best aggregate coating.6.5 Rate the best coating as good,fair,or poor using the ratings as defined in M e t h o d D 244.7.Report 7.I Repor