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~uu~ <br />shich can bt ,tcw eh larked t.+gcihti ^i fsnm <br />: cylinder mrrum~ Ihr rryuilrmrnt, u( thi, <br />~rctian. The molds mac .also hr the '"t.:pci" <br />ype. pn,vidmg the into rn;d diameter taper n <br />mi(orm and is not more than U.?OQ in llinear <br />t (16.7 mm/linear m) n( mold hrl_ht. Each <br />nold ,hall have a bast pl.ne assemhls ;cod en <br />atmion collar ~„cmhly. both medt of rigid <br />ntt.il and armtnicted sn then can hr sccu eels <br />nt,¢~htd ter nr dr L:ehrd fn rm Ihr mold l~ht <br />..V Cn,wn atllar u,scnthlc ,hull h;ivi a bright <br />`stcndint ahavt the top al the mold of at <br />n:v ? in (i(1 8 non 1. which cons inchidc do <br />upper scetion that hart, out in form n funnel <br />provided there is at least ;: '/.,-in. (19-mm) <br />slraighi cylindrical section beneath rt <br />3.1 .I binlrl. 1.0 in. (101.6 mm) in di::me- <br />tcr, having a capacit} of 'hn w O.OOf)1 h' (944 <br />I I cm') and conforming w Fig. I . <br />3.1.2 Mold, 6.0 N. (152.4 mm) to diameter. <br />having a capacuy of voaaa ± 0.0009 (t' (2124 <br />t 25 cm') and conforming to Ftg. 2. <br />3.1 3 The ;n•ei a_e into: n.d diumrtri. <br />height. and volume of each meld shill he <br />determined before initial cot and at mterv;d, <br />nut exceeding If10U times the mold is filled <br />The mold solumc ,hall br edlcul died (ram Ihr <br />ascragt of :n Itasl sin iota rn;d diamttrr ;cod <br />Ihfc'e (leiLh; ^1C:NnICnli^1, nr.uk u. the nr:n- <br />e,t U.UUI in. IILI)? nun). m toms the amount <br />u(watct rryuircd ur eiimpr tnh Ids the mold. <br />a rrracird (rr tempe r;nme san;inct in ucund- <br />.mce with Table I Ii the asci.iec internal <br />diameter and salumc .tee not svithm the rt,l- <br />erancts ,hewn m Figs. I or _. the mold sh;dl <br />oat ht used The Jctcrminaf volume ,hall he <br />u,ed in computing the required de nsitics. <br />}.~ Rummer-The rammci m^s' he tither <br />manually operated (sec 3_'.I) or mechnni- <br />cidly opt r.rted (see ±'_2). The rummer shall <br />Fall freely through a distance of 12 0 '_ 'An in. <br />(304.8 '_ 16 mm) from the surface of the <br />sptcimtn. The manufactured weight of the <br />rammtr shall be i5 ` U.02 Ib ('_.49 x f1.01 <br />kg). The specimen contact fete shall he flat. <br />3.2.1 Manual Rummer-The specimen con- <br />tact face shall be circular with a dtameter of <br />2.000 t 0.005 in. (50.80 t 0.13 mm). The <br />rummer shall be equipped with a guide- <br />sleeve which shall provide sutPicient clearance <br />so that the free Call of the rummer shag and <br />head will not be restricted. The guidesleeve <br />shall have (our vent holes at each end (eight <br />u oyn <br />holes total? located with cemers 4. rte in. <br />(19.0 ± 16 mm) from each end and spaced 90 <br />deg apart. The mmimum diameter of the vent <br />holes shall be )'< in. (9.5 mm). <br />i ?? ,Lleclumtrul Rununtr -The runmrr <br />,hall opuate mrchanic;ille in such a manner <br />,:, ro pnn'ide uni(oim :cod comphir n,vt rage <br />of the ,prcimen sur(ece. There ,hall be 11.111 <br />tL(13 in (?.; - 0 S mmlcltar:mce between <br />the rammtr and the m,idc ,urf:u•e of the nudd <br />.u its ,m.,lle,t di;unrtei. \\'hen u,td ss nh the <br />4 (1-in. (101 6-mm) mold. the specimen con- <br />cu't (ace ,h.ill hr cn culni with a dienmicr u( <br />2000 ± 0.005 m. (50.80 t 0.13 mm). When <br />used with the 6.0-in. (152.4-mm) mold, the <br />specimen contact face shall have the shape of <br />a section o(a circle o(a r;idiu> cyunl n, '_.`AI <br />(1 0'_ in. (73 7 _- ll ~ mm). The actor face <br />r;nnmer shill opcruc in such a m:mncr that <br />the venez a( [he srcnir P positioned at the <br />noire of the specimen Tht mechanical iem- <br />mer sh;dl ht cahbt,itrd ;cod adjmtcd. as nco <br />esan. in ^cmrd:ms wnh 3.3. <br />:?.1 CiJihrutiun and Atlpunnent-The <br />meth:mac:d nmmar ,hall be calibrated. and <br />adjusted as nrce>+a rv. he (ore initial u>e: near <br />the end of each penod during which the mold <br />ss a, filled 10011 time>; before rru>e after any- <br />thin_. including rc p.un, which nui) ^f(tci the <br />tc>t ie~uli, sieni(ic;m tic: ;cod whenever the <br />ir,t ir,ulr. ;ut yur,tionahlc Each cahbraiiun <br />and adjust ntent sh;dl hr in .iccordanct with <br />Method D ? 168. <br />3 3 S~aniple Et vuder (opuonal)-A )ack. <br />(rime ar other device adapted for the purpose <br />u( ext rudine compacted sptcmrtm from the <br />mold. <br />3.1 Bulnneer -A balence or x.dt of at <br />lea,[ _'(I-kg capacity sen.tive to r 1 g and a <br />balance of at least 1000-g capacity sensitive <br />to X0.01 g. <br />3.5 Drying Oren, thermostatically con- <br />trolled, preferably of the forced-draft type, ca- <br />pable of maintaining a temperature of 230 t <br />9°F (110 ~ 5°C) for determining the moisture <br />content of the compacted specimen. <br />3.6 Straightedge-A stiff metal straightedge <br />of aoy convenient length but not less than 10 <br />in. (254 mm). The scraping edge shall have a <br />straightness tolerance o(t0.005 in. (10.13 mm) <br />and shall be beveled if it is thicker than '/e in. <br />(3 mm). <br />3.7 Sieree. 3-in. (75-mm). `/+-in. (19.0- <br />vn <br />mm)anJ No. 1 (1 7~-mm). confoi mina W the <br />requirements o(Specification E I I . <br />3.8 Mia my Tnn/s-Miscellaneous tools <br />such as mining pan. spoon, trowel, spatula. <br />etc.. or a suitable mechanical device for ihor- <br />oughh~ mixing the-sample of soil with mcre- <br />men[s of water. <br />4. Procedure <br />4.1 .Specimen Prepurarirrn -Select a rtpre- <br />sentalivt portion rr( quantity ;idequ:rte ht pro- <br />vide, after sieving, an amount of mate n:d <br />weighing ,u follows' Method A-2S Ih (I1 <br />kg); A9cthods l;, C ,cod U-50 Ib (_3 kg). <br />Preport specimero in accordance oath either <br />4.1 .l through 4.1 .3 or 4.1 4. <br />4.1.1 Der R'rpmtrrion PrnnyLur-I( the <br />sample is too damp to be triable. redact the <br />moisture contem by drying omit the material <br />is triable; see 4.1 .?. Drying may be in air or <br />by the use of a drying apparatus wch that [hr <br />temptruture of the sample does not exceed <br />110°F (6l1°C). Alter drying (i( acquired ). <br />thoroughh' break up the aggregatioro in such <br />a manner as to avoid reducing the natural size <br />of the particles. Pass the material through [he <br />specified sieve as follows Attthods A and B - <br />No. 4 (4.75-mm); Methods C and U-'/,-in. <br />(19.0-mm). Correct for oversize material in ac- <br />cordance with Section 5, if Method D ti speci- <br />fied. <br />4.1.2 Whenever practicable, soils classified <br />as ML, CL, OL, GC. SC, MH, CH. OH and <br />PT by Classification D 2487 shall be prepared <br />in accordance with 4.1.4. <br />4.1 .3 Prepare a series o(at least four spec- <br />imens by adding increasing amounts of water <br />to each sample so that the moisture contents <br />vary by approximatety 1'L 90. The moisture <br />contents selected shall bracket the optimum <br />moisture contem, thus providing specimens <br />which. when compacted, will increase in mass <br />to the maximum density and then decrease in <br />density (sec 7.2 and 7.3 ). Thoroughly mix <br />each specimen to ensure gyro distribution of <br />moisture throughout and thin place in a sep- <br />arate covered container and allow to stand <br />prior to compaction in accordance with Table <br />2. For the purpose of selecting a standing <br />time, it is not required to perform the actual <br />classification procedures described in Classi- <br />fication D 7457 (e ecept in the case u( rt fe tee <br /> <br />testing ). i( previous data txist a-hich provide <br />u bmis (or classifying the sample. ' <br />1.1 4 Alnist Prepararme Method -The fol- <br />lowing alternate procedure is recammtnded <br />for soils classifed ae ML. CL. OL, GCr SC, <br />MH. CH. OH. and PT by Classification <br />D?987. Without previously drying the sam- <br />ple, pass it through Ihr '/a-in. (19.11-mm) and <br />Nu. 1 (4.7i-nun) s,e vc s. Correct fur oscrs¢e <br />mate nal in accurth,na wnh Sccuon 5, i( <br />Melhud D is spccmed Pre p.uc a st rtes of at <br />Ir:ui four ,penmen. has ing moisture contents <br />that sarv by dppnixim:nek I'/: !%n The moir <br />nnc con(enls tic lcelcd .hull bracket the opti- <br />mum moot arc content, thus pros iding speci- <br />mrm which. when cam parted, will mt'rcasc m <br />coin, to Nii rn;i~inuun .tensor' ;cod then de- <br />crease m dens: n~ (see 7 2 and 7.3 ). Tu obtain <br />the appropriaic muuuire content of each <br />specimen, the addiuon al a predctermmed <br />.unou ni of water (see a.l .3) ur the removal of <br />a prcdctcrminud amount iii muniurt by <br />drying may he ncccs,an' Drying may he m <br />air or by the me o(a drying apparatus such <br />that the itmpe ranire of the specimen does not <br />exceed 110°F (60`C). The prepared spea- <br />mcns shall then be thnnnighl} mixed and <br />sumd. a, epecilird in -7 I ; ;cod Table '_, prior <br />Ira t'U nt paClio n. <br />Viii. i-N nh pracnee. it is inudlh possible to <br />•. nudlls )utlce the point of npiimum moisture <br />do,cly enough ,a Thal the prepared specimens will <br />bracket the poim of optimum mmsiure consent. <br />4.? Sprr irnen Curuporuort-Select the <br />proper compaction mold, in accordance with <br />the me(ho<i he mg used, and attach flag could <br />extension collar. Cum pact each specimen m <br />^iret layers n( approximately equal height. <br />f=ach I:ryer shall receive 25 blows in the case <br />of the 4-in. (101 6-mm) mold; each layer shall <br />receise 56 blows m the case of the 6•in. <br />(I i2.4-mm) mold. The [Dull amoum of ma- <br />itnal fined shall he such that the third com- <br />pacted layer a slightly nbuve the sup of the <br />could. but nut exceeding '/, in. (6 mm). <br />During compaction the mold shall rest on a <br />um(orm ngid lounduuon, such as provided by <br />a cylinder or cube of concrete weighing not <br />Icss than 200 Ib (91 kg). <br />1.2 l In ope ruing the manual rammtr, <br />care shall be taken w asoid rebound of the <br />rummer from the top end of the e,u idesleeve. <br />