Download AASHTO T-245 PDF

TitleAASHTO T-245
File Size5.7 MB
Total Pages10
Document Text Contents
Page 1

Stqndard Method of Test for

Resistance to ptastic Frow of B¡tuminous
Mixtups Using Marshatl Apparatus
AASHTO Designation: T Z4S_9T (2001)

1. SCOPE

1.1 This method covers the measurement of the resistance to plastic flow of c_ylinclrical specirrrcns rri.bituminous pavingmi)(ture loade«l ,rn th" lur",.tsurlace by.,-,,,"n.r olttre t,ta¡st.a.tt apparatrrs..l.hr..

ff[11:;-}[i: ilj'#'i|;fi:,1;::'"'"t
.,*pt'utt'"'"n',

"pn.r,
.,,ii,,,ck.r,.r, ,,,r,r iigr:r,q,,,,.

2. APPARATUS

2.1 specinten Mokr As.sembly-Mord eyrinders 101.6 mm (4 in.) in dianreter by 16.2mrn (3 in ) inñeígfrt' base plates, andextension.áIlu.r rÁolf .nnrorr'to trr" á.,a,r, sñ.wn in Fr.gurc f . .fhree-r¡mota cylindcrs arc recommended.

Compaction
Mold Syrnmebícal
AboutThis C

Figure 1
-Compaction tv1«;ld

I

4%'o.D.

4y.. t.D.

h_ 4,ys_

Js;á.'D

4y.'D
Compaclion Mold Assembled
with Colar and Baso ptat6

Steel-Cadmium plated

Compaclion
Mold

Base Plate

T
_\(

a-
L-- 4.oos.

rs-2d
T 245-1

AASHTO

Page 2

a. '!'
a?-

Table 1-Table of Equivalents for Figures t and 3
Metric

Equiva-
lents,
mm

U.S.
Customary
Units, in.

Metric
Equiva-

lents,
mm

U.S.
Customary
Units, in.

Metric
Equiva-

lents,
mnl

U.S.
Customary
Units. in.

lv{et¡ic
Equiva

Ie n t.s,

0.l l
0.8

t.6

3.2

4.8

6.4

7.t

9.5

\2.6
t2.6'7

12.7

14.3

rt ts.s

o lxLs
t,tt2
l,lto

tl

tt2
ft

t).496

0.499

t7

ll
l,

.i8 7
61.s

69.8

7l.0
762
82.ó

87.3

98.4

l0t.2
r0t.3.5

J».41
¡01 .6

I 0l .73

,ti

l

3'/,"
-,,.\ /t

1.990

3.995

4

4m5

r08.7

I(».I
I 1.1 .1

tr7 -5
tzaó
t28 6

130.2

t.16.0

t 52..1

t58.8

i93 l
(;8-5.8

LI.:i,
C ¡.r¡1,¡¡1,,,.,

.to,,,l

J',',

.! t,

5 ',,,
^

5,.,,

5'/,

)7.5

19.0
,a a

23.8

25.4

28.6

3 r.8

34.9

38. I

4 I.3

44.4

50.8

51 .2

llt
, t6

)t

I

t'.b

l'/,
l't,
I
tl,

lt/,
l't,
)

rl,

mm {lnttS. ll.t
104.8 J

".

¿.¿..

Éfammer WeÍgñt 10 lb,4536 g

Fig'ure 2-Compaction Hammer

2.3.

+
&

Spring
Guide

@

m
Sloevo

[email protected])
r

ñ
I

Foot

'Ir 3
(98.4

-L
{@)--r

N
Handlo

speci'nten Extractor' steel, in the form of a disk with a «liameter not lcss than lü) ¡"¡ ( r {)j ,rand 12'7 mm 1ll2 in') thick r,'""^t.oating,tri'.nn',no.,.d s¡recimen from thc s¡rccinrcn ,)rriLj r,,rithe usc o[the mord cottu. A sr.titabr",tit i","q"ir.tl tot¡ansfvr the \r,¡d frorn rtrc ,nrdynamometer adapter to the extcnsic,n c<¡lra, *hire extracting thc specir,en

compaction Hammer--Thecompaction hammer (Figure 2) sha, havc a frar, circular ra.rilli*{lg i.rand a 4536 t 9 g (lo t 0.'02 lb)siidi"g ;;üil; i;n"lujing ;r"i, n"g", guard ii so ccruir¡nr.ir, ,.r,:i,frecfall of 4S']2 + 1.524 mm (lg,tloo ir".t., '

N
N

siEC
*EF::=::¿re-_*

Elension Rod

cl
¿

o
o
ñ
o
e
o
ñr
c
o
E
c
ñr

TS.2d
T 245-2

'\.1 :"

Page 3

1--r

2.4.

2.5.

2.6.

Note 1-The comDaoirrn h"-*-- _
Figure z.

--"'¡'action hammer may be equippcd with a fingerr sa[cty guar<j as shown ,r
Note 2-Jnstead of a hand_operarcd h¡mmcr2'4, and 2.5' a mechani.rily op;;;;; ffi;'Ji 1'i..',t:ut'ot:rl

equipmcn.t describert in sections r .rresults comparable with ,il h.';;;#il;::fr?.be uscd provitlcd ¡t i,r. t,"",, ..r'i'h;::i';,, F,,,
compaction PetlesÍal*T're compaction pedestarsha, consist of a 203.2 by 203.2-by 4-57.2-rnrn

Jtiltiii'JfiJp"r *;;.6ü fiI,i, ,* r- úv :o¿'s-'ír"lr . ,n* 02. by ,2. by ,.in )
Tir, ris,ffi iif iülti,",l*'#,*':,rl:#i[:¡1x; ru;:nt rbe installed so thar,¡. p*,1p¡l#;#:T,rp

is rever. - rñe p.o"triirr-r'.riiirnr,,
Specimen Motd Hotde,

;jl*mng*",.Hji¡;:,ffi:Ir,§:,ri:ii:::ji,::',l,il:::'fi[,.,Jt,11i,,,,,1,,,,,,

ur:::!':lHearl--(Figurej)
shail con.s-¡s.r of upper and,rowcr clrindricar segrncnrs or resr hcrds

nav¡ng an inside radius of curvr,rr"
"i.ioi "i;, f, in.) act:rrraiclv mrcsb¡rr l,* maunted on ¡ ba-ce;;,rr;;;il#i;J,í]: ],:,::":"':1, machincci.

'r'hc rt¡rvcr ."g,,.,,,
sreeves," i¡"',,i*,.'*ffiiffieJ];,::ff:t::,r,,gd;;;.,,r.;i';:,. r:xr.r,rJjn¡ ,,p.,,,.,,1 ¡;,,¡,,,.witho'r appreciatrc biiaing

",
r".r" ,,rii;i ;;H:::I':',:i,l]'"., rhc 1rv1, ,.g'n",i,.',,,g..,i,.,

Tl.

rs-2d
T 245_3

AASHTO

Page 4

o-ÑL(J r.-
I'O
oc{
orrli
ñ>xó
J¡o(D

o
g
o
o
E

.% ¡*
gl/

llx
ft.r -
iltt

o
C
o

:E
IE

do)
Fa
^a

§
]
0)

o
a

@
,EÍ
o

¿
D
(o
o
I
E
(L

JL_tgtr'

}(

+E
§ n,**


ID
ú.
oo
U?
o

@
L
o)o
J
!

o
I
a
o
F

:lq
LL

o
o

rñ o)\-./ c
áar
ñ:J

d) *

§i
:f!

uJl

-,u
¡:lc0 cn
L
'- LL

T

l"
I

II

[email protected]'o
6

LI€l
!N
Cq'a)
bE
É3


o
(u
o
o-)

13
(g
o)
:E
o
o
F

t=-.r, _____{
.Ytt

o6
Ee
60
_ c\.t.C,
oS

B
x.

s

1T-

h.-*

I
.I

v
-'E'

¡\§
L.x,l.x, )

L
F
Cf
§¡
\t

-l .% r |*r 4 §

I

li
F-"e
AI
v---i
t;
ñiI \ r

AASH IO
-I 245-4TS-2d

Page 5

A+-l

Front

T-
I

I
I

J

I

I

v
.9
o
I
x
I
o


E
@
ú,
@
I
N

I

I
I

I

l_

2.7. toadíng Íack-The toading jack (Figure 4) shall consist of a screrv jack nrountc<J rn a testing
Lrame and shall produce a uniform veñical movement of 50.8 mrn (i in.)/min. An electric moror-ñay

be attached to rhe lacking mechanism.

Load Beam

Ring Holding Bar

Dial lndicator

Proving Ring
Spring Steel

Proving Ring Adapter
HolóOown 8o[
Vertical Spacer %'(1e.0 mm)

Hold-Down Boll

'rlsrtical Spacer
(101.35 mm) Dia. %'(186.1 mm)

HP-1725 rpm
Elect Motor

Elevating Screw

Output Shafl
(for Hand Crank)

lnput Shaft

Jack Housing

Section'A-A'

F igure 4-C<tmpression Tesfing }{achine

2.9.

Note 3-Lnstead of ttte toading iack, a mectr.anicat or hy<i.rauti: testing machrne m..ry tv: ,sse<l
provided the rate of movement can be maintaine«l at 50.8 mnr (2 in.)/nrin while the lr.>aci rs appliccl

Ring Dvnamonrcter Asse¡ná/y-One-ring dynamometl. lfigure 4) of 722KN (5ü)0 )bl) cirp:rcrr.,
and sensitivity of 44.5 N (l0lbfl up to 4.45 KN (l000lbf) and 1l l.2N (25 lbl) benvcen.l.J-5 uncl
22.2 KN (1O(D anü 5tC0 lb| st¡all be equipped with a ¡nicrometer rli:ü.'The nricronrcrcr dral sir¡ll

*be gradualed in 0.0025 mm (0.0001 in.). Upper and lower ring dynamometer arrachmenls arc
Tfrequired ftrr fastening the ring dynamometéito ttre testing frame arx] transrnitring the loirtl ro rhc

breaking head.

Note ¿l-lnstead of the ring dynamonreter assembly,.any suitablc loa<l-measuring clcvice rna1. l-,c
used provided the capacity and sensitivity rneet.the above requircmcnts.

Flowmeter-Tlle flowmeter shall consist of a guide steeve and a gage. Tl¡e acrivating prn ol rlrc
gage shall slide inside the guide sleeve with a slight amount of fiictional risisranie. T'hc guiilc
t'leevc shal\ slide {rcely syer tt}e guide rrxl of thc breaking hcrd.'[he t]o'wmcrer BaBe sh¡\\ be
adjusted to zero when ¡rlaced in positit"rn on the breaking hcad whcn eaclr indiviclu¡l tcst spccirrtrr
is insertcd between the breaking hcad segments. Graduations of'the f'lr>wmeter grgc shell be in
0.25-mm (0.0 l -in.) divisions.

Note S--lnstead of the fl<:wmeter, a micrometer dial or stres§-strain recorder frra(luilred in ().1.5
mm (0.01 in.) may be used to measure flow.

---l Jack Head
--I Not Over 3.990;t-

! :-.
t="
t

2.8

TS.2d T 245-5 AASHIO

Page 6

2.10.

2.11 .

2.12.

2.13.

2.14.

2.15.

2.15.1

2.15.2

2.15.3.

2.'15.4

2.15.5.

2.15.6.

2.15.7.

2.15.8.

2.15.9.

2.1 5.1 0.

?{f!'; !;;,"1:f.'r.üil:ffiHJ,",',".','}:T,::Jj^.r;Hror rr.earinr aBBrcBarcs, b,rumin,,,,smotding remperarures..rr ¡s,ecommJni"ü',¡,, ,h;il;;;;;t,ffi:HJ.|[J:][[lil:iffi1:.as to maintain thc rquiyd,..p.."irr" üthin2 g,Cffi.:ñil.
shields. baffle plares, or sa¡rti

baths shaa be used on the surfal"r.ii.'rr", prrt.r,o rniíir]ir".i*.,,r.«1 ovcrhearing
llearing Device*A.small hot plate with continuou.sry variabrc heating rate, a sand bath, infi¡rc,l
il,T,?,i,"l,li.ili;l,io,.

¿_,;* Jr,,iiü'.",,,,0," r",,írpL,i"r.,li.,.,,
hea! under tb. ,nii,xing

:f ¿t'ftril"ff *-ffft,1.rj;*Lgmu:r*;l;xti"ffi ilii:[í:.ai:r
\*Iixing Apparatus-Mechanic¡J mixing is ¡ecommendqi. Any.typcof mechanicaf mixer mav beused provided it can b" mainta¡neJ-"iiñ" r"qr,r.¿ *ir,"g ;;"í,"i.ff*" and wi, produce o *.ir-coated' homogeneous mixture

"r,tr"
rüri*á

"*or"ii, ir.," ri",#',. rinre, and flurthcr provrd-e,.ilT:TI#l'J JI ;:ii'"'J;:I
;= ; ;; ;;;;;;; ffi ;' ;", 1' i"'ll *, o f s u f f , c i c n, ., n. Ji,, . .,,

watter Barh=-*The waler bath shall bc at least 152.4 mm (6 in.) deep ancl shail be thermostatica[ycontrotted so as ro mainrain tr," ¡att
"iLó= ,.c Croó * r"r1.j,;;.[: l.C (t0o-t2.F)..!lre r¡nkshall have a perforated r'rit.u"¡,o,n or ü

"qripp"a
*i,r,*-r'rr.irinr-r,,ppur,ing

.specirnens 50.g rrrr.n
(2 in.) a[¡¡y6 the borrom of rhe barh.

iíff:h:i:,il^li*fi:XTl'ii'"BiiiT'ffi sh¡rr bc (hcrm.sraric¿rrrv c,,.r^,rcd ;,n,i si,:rrr
lll isc e I I a ne o u.s Eq u i p»rcn t :

container'r for Heating Aggregates- flat-bottom metar pans or other suitab.e con(aine¡s.'rr

::#;:::*;trx:#Bituntittous Mareriat- -either gilt-type rins, beakers, pouring pors. or

Mixütg roo{*--eithcr a steel trower {garden type) or spatü.Ia, fclr spariing, and hancr rnixing.
'T'herntome ters*for de'lerm)ning temwÍa¿urcs <t[ aggregates, óifumen, and bitumin,us nrixturcs.Ito:* t,lss' diar rype, or aigltul tt e,n,i*-","., wirh metal stems artrom e e ro 204"C (50 to a,o?j. *i,r,.""r1il,tr;¡2.;.;¿ (5;üT,;ffi:ff.,mmended A rangc

Il:H:,I:HljI,}H:f¿#::1il:1sitivc ro 0 2"c (04"F) rvirh a rangc surncicnr r.
[]¡116a¡¿-/-kg

':aprcity, sensitive to 0. t g, f.r weighing morcred specilncns.
Balant:e-S-kg capaciry. sen-cjrjve ra 1.0 g, for batchingmix(r¡res.

Gfuv¿s-for handling hot equipment.

Rubber Gloves*for removing specimens from water bath.

Marking Crayons*f<.r identifying spccimcns.

rs-2d
T 245-6

AASHTO

Page 7

2.1 5.1 1 .

2.15.12.

Scoop*flat k¡tto¡n, for batching aggregatcs.

spoon*large, for pracing the mixture in rhe specimen molcrs

3.

3.1

TEST SPECIMENS

{;.'k:{lf::rilnens-Prcpa¡e at lea.sl three specimens for each cornb¡nariorrcf aggrcg.rcs ;rnci

Prep<r«cwa o{ A'g,zr1za,tas-Dry aggregares ro cr¡nstant üurs¡i at t05 to I ltrc (.221 to 23ffF) ancl
#3i::t;j}eassresates

uv a'v-sievirig iíto the a"si,.¿rir" ir.ii,.i, ' rhe rouowing rJJrrr.,iun,
I 25.0 to 19.0 mm (t to 1r in.)
r 19.0 to 9.5 mm 13/a to 3/s in.¡
r 9.5 mm to 4.75 mm (l/s in. to No. 4)
a 4.'15 mm ro 2.36 mm (No. 4 to No, g)
¡ Passing 2.36 mm (No. g)

.

Detennination of Mixing and Compactittg .I.e ¡nperotures:

The ternperatures to wñrch tñe a'spfraft cement antf asplraft curb¿rck rnus( bc ñcarecl r. ¡rr.r/rruc uvi.scosity of 170 + 20 cSt shall be thc miring'remperaturc.

'rhe temperature to which asphalt cemcnt nrust be heated to prociuce a vi.scosir),oi2ti0 * .r0 r:.\rshall bc rhe compac(ing temperature.

From a composition chart flor the asphalt cutback used, determine lrom irs visc.sity ar 60"(]$4rD the ¡rercentage of solventbi;.;;.;ro rJetermine fro¡n the charr the visc.siry ar ócnc(14trD of üe asphalt cutback after it ili;;50 perccnt .f irs.sofvenr. Thc rempcrarurcdete¡m)»ed fuom the vjscosily reaperaile .i,urt to-*r,l"h the isphalt cutback must be heate<J tcr
r:T:T"il:fi::ffi::"tio "si afte* r;;;;ó;;;Jil,iilil,,8i;;".i;;;' .".,1,,, ,..,, ,

'The temperature to which tar must be heated to pr<>cluce Engler specific viscositics o12.5 * -l ;rnrl4O + 5.sfráfl be, respecrrvuly, tfie mixing urJ*rnprr,, ng temqrature.

P re¡rr rot ir>n of M r_rrrt re s..

A¡ jnitial hatch shall bc míxcd for thepurpose of "buttering,'the mixturc b.wl and srirrcrs .r.rrrbatch shail be cmptie<J arter mixing a;í;;;;", of the boír _;J ;;i;;r. shan be crcanccr t¡r.mlxturc residuc by scraping with ismall l¡*tcr spatula but shall n.r be wipecl wirh clt.rrh .rwasl¡ed clean wtth 'solvént,-except *h";; .h;;geis Io bo madc in rhe bindcr t¡r ;rr rhe c.d .r ¡ rLrn
lveiglr innr separaru pans fcrr eacft resf .spccimen ¿lie arnour¡¿ of eac,h size fracti<-¡n re<¡uired toffiduce a barch that wilrresurt in r.";;;;;specimen 63.5 * Irt;*, (2.5 + 0 0-5 in.) in heighr(ábout l2ü) 8)' Mix the aggregafc incach p.n und place the p;..; o hor prrt. or i,-, rhe ov,en an<Jheat to a temperature no-r exceédin8 the mi;in; temperature istablishett in section 3.3 by morcthan approximarery 2g"c (srel roi asprrrii'..il*, and rar mixcs ar l4"c (25"F-) ror curir¡ckasplralr mixcs' Hea(' fr: rfic estaílist¡e,J'Á¡*¡ri'i"^peruture,ju.sr

sufficicnr bi¿uminotr.s r¡ia1c¡.ir/ ¡()rthe batch in a separate container' charge tr.,. i,i^irrg bowr with t¡" i.or.a aggregare. F.rm ¿r r:ralcrin the dry-blended aggregate and weigñ tn" pr"heutea requirecl ¡moturt of birumin.us nr¡rcri;ri intr.r

3.2.

3.3.

3.3.1.

1aa

3.3.3.

3.3.4,

3.4.

3.4.1-

3.4.2

TS.2d
T 24s-7

AASHTL\

Page 8

3.4.3.

"rr
the mixture' For mixes prepared with cutback asphalt, infrocluce thc mixing blarle in thc mixi.gbo'wl anÓ daerm¡ne the total mass o{ tt e mix components p)us bowl and blarie before prrxecdingwith mixing. care must.be exercised ,o pr"u"n, lois of ti,"'-i* ;;;g mixing and .subsequenrhandling' At this point. the temperarure li-,tl oggr.gote an«l bituminlus material shall bc wirhinthe limits of the mixing temPerature established in siction 3.3. Mi^ ;;" aggregare an¿ biruminousmaterial rapidly untir thoroughly coated. To mainrain proper mixing remperarure, one of thcmerhods described rn Sectioi Z. t t may U"

"r"¿.
Fol'\ox'iag mixing' c'ure aspftalr cu¿bac-,k rnix¿u,-cs in a ren¿ila¿erd oven maintaine.l at approximatcryI l ' l"c (2fffl above the compactio-n temperalre. curing i, to ur.unt¡nued in rhe mixing bowruntil the preóalculated.weighi of S0-percent solvent lossir,n,rr" i* i..n obrained.'l-he mix rnaybe stirred in a mixing bowt during crting ¡o u...lerate the sorvent loss. FIowever, care shorlcr beexercised ro prevent loss of the.llx, w"ie¡, ,h" ;i;;;;;;;; in.rr....rir. intcrvars .r r-5rniñute'§ initidl¡' and lcss than l&rninur.inl*.oolr r., r,t*i";gli.i¿'i¡. ,,,¡^ ar -ro-¡rcrcenr s(''r/v,er¡(loss is approached.

C om po c t io n of S p ec im ens:

rT'
Thoroughly clean thc specimen,mold assembly and the face of the compacti.n harnmer and r¡e rrth,"::Ih:r_r_, boiring water, on'the tot ¡rlrt", o, in an ovcn, ro a ter,pcratt¡re betw,ce n 93. j ;r.tr148'gPC (2oo and t*D. Place a pie." or fr'lter paper or paper'rowering cut r. size r n rhc br.r¡r.nrof the mold before the mixture is introcluccd. Place the erlriic b;rtch:in rhc rn.i<J, spacle rhe mirturrvigorousrv with a heated sparura or rrower l-5 ri;¿s ;;;; il ;;;,ii:,",- rntj r0 ri¡nes over r'einterior' Remove the collar and smooth the surface of the mix ,J¡in o uo*"r ro a slightly r.un¿crrshape' Temperatures of the mixtures immediately prior to cornpaction shall bc witlri¡r rhe linrirs t,lthre ctnrrpartirB temlrsr¡t\Ile usfablishctl irr Scction 3.j.

RepJace thc coila¡, then place a pr19c of iltcr w¡,cr lpraprer tor,cl,»g cu, ¿{) si¿c on tt>p o{ thcmixture and place the mold-assembly,on the cámpoction pe<.tcstal in the molcl holcler. and unlessothcrwisetPYldtapply50orT5 úlows with thecompacrion io.r"", wirh a fice fall rn 4.57 amm ( l8 in')' Hold the axis of the compaction hammer pcrpen<licurar to tlle base of' rhc rn.lrjassembly during compaction' Remove the base plate a;d collar, on,l *u"rs" and rcas.senrblc rrrcmoJd- App'ly
'be

sa¡¡e numhe¡ of compactio¡r bJows to the lacc of tlte ¡cver.sed .rpccirncn. .,\frcrcompaction' remove the base plate aná place the sample extractor on the en¿ of tlre spccinrcnPlace the assembly with the eitension
"tltur

rp in the tesing -".r,i"", appry pressure ro rhe cr¡r:rr
H'Tnt of the load trans[er bar, and force th! specimen inL rhe extension collar. Lif.r rhc coll.rIrom the specimen' carefutly hT:{"I the specimen to a smooth, flar surface anrJ all.w il rr¡ sru¡rriovernighr ¡, roorD tempe¡at:urr* Wejgh -"rrrr", ¡¡d ¡es¡ üte spcc)rncn.
Note 6--In gencral, specimens shall be cooled as specified in section 3.5.2. whc, m.r¿ r,r¡rrjcooLing ts desired' r'abln' fans rnay be use<L Mixtrrres (hat rar:k su{trcien( c,¡hesi.n (o res,.rl( i* (hcrequired cylindricar shane-3n removal fronr the,mord imrnediatery nri., conrpacl¡on ma_y bc c(x)rc(iin the mold in air until sufficierit cohesion r,o, o"u"l,rp"¿ r., r"ruri iJii,. prup", cyiin<rricar sir.¡rc.

3.5.

3.5.1

s.5.2.

4.

4.1.

PROCEDURE

Bring the specimens prcpared with asphalt ccment or tar.ro the spccified re mperarure b;,immersÍng in the rvater bath 30 to +0 rninut"s or placing in rr," oi"n inr rwo h.urs. Mainrri. rhcbath or ovcn temperaru¡e at 60 + r"C (140 t l.s"b for ih. ,rpnrr, i.."nr spccimens and l7.ii rL'c ( Loo t t '8"F¡ for tar specimens. Bring the speci*re.ns preprred, wirh asphr.tt curb«c!-. ro r,trcspecified temperature by placing them inihe air-barh rn, o',"ni'nr.u, ol,*u l¡.urs lr,rainrain lhc :rrrbath temperaturc at 25 t i"c 1zi * 1.8"F)-Thoroughly clean the guide rods and rhe insj<je surfaccso[ the test heads prior to making thc test,'and iu¡r¡ior" the guide ;J; ," thar the uppcr test he ac1slidesfreelYoverthem.Thetesting-h"uat"rnp*rrtureshall
be¡nain(aine<l bcrween2l,l rolTs.c

TS-2d
T 245-8

AASHTO

Page 9

4.2.

(70 to-l00PF) using a water bath when required. Remove the spccimcn fr.nr rhe rv¡ter bath. rr'cn.orairbath'andpfaceinthefowert"g*"nioftñeóreakingt.r..i
Flacetfieuppcrscgmcnrofrfic

breaking head on the specimen, and place the complete aisembly in position on rhe resring
T machine' Place the flowmeter, where used, in posiiion over oneLf tne gulae ro<ls anri adjusr rhcflowmeter to zcro while holding the.sleeve ñrmly against th;;p;;; segmenr ol thc breakirrg heaciI-lold the flowmeter sleeve firmly against the upper segmenr of'the breaking heacJ rvhilc the resrfoad is being appfied

Ayp\y thc lc'ad to the sPeclTt by rrrear\r o( the eonstant ra(e of $K\vcrnen{ of the loa.d.¡rck o<testing-machine head of 50.8 mm (2 in.) per minutc until the maximum loacl is reache<j and thc
load decreases as indicated by the dial. Record the maximu¡n load nored on the tesling machine or
converted from the maximum micromctcr dial reading. Rclease the flowmeter sleeve or notc (hc
micromcterdial reading' where used, the instant the n]aximum loacl begins to <.lecrcase. Nore and
rcc¡:aü tht irdicatcd fl,t¡w vtlue or equi'ralent uni\s in t're,,rty-tive hun<lre<iths r¡( ¡. millimeter
(hundredths olan inch) if a micromcter dial is usecl to rncasurc the lLrrv. Thc clapscd rinrc lor rlru
test lrom removal of lhc test specimcn fro¡n thc lvatcr bath to thc nr¡xrlrrrn loarj dcrt:r..inarr..
shall not exceed 30 seconds.

Note 7-For ctlrc specimens, correct the loacl when thickness is orhcr than ój.5 nrrn (2rl. in ) t.,,
rrsing thc proper multiplying'factor from Table 2.

{

I

1

l

l__

5.

5.1 .

5.'t .1 .

rr REPORT

5.1.2.

5.1.3

5.1 .4.

The report shall inclucle the f<lllowing infr¡rrnation:

Typc of samp[e tested (faboratory sampfc or pavement corc spccínrcrr),
Note 8-For core specimens' the height of cach test specirnen in nrillimeters (or rnches) sh¡li
be reported.

Itteruge t¡taxitt¡unr ltlad in pounds-forcc (()( nr,wtons)<rf a¿ Jca.ct threc spc.r.rrrr('n.r. c(¡¿¡¿.(¡cJ
whcn requircd,

Avcrage flt¡w value' in hundredrhs of an inch, twcnty-[vc huntlrcrlrhs ol ¡ nril]ir¡ctcr. ¡l rhrcr
specimens. and

I'est temperature.

T!'

TS.2d
-l!P T 245-9 AAS.HIC

Similer Documents