~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 />
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