IS 14739: Geotextiles - Method for Determination of Creep

10 Pages·1999·1.2 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
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timely dissemination of this information in an accurate manner to the public.
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“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 14739 (1999): Geotextiles - Method for Determination of
Creep [TXD 30: Geotextiles and Industrial Fabrics]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
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“Knowledge is such a treasure which cannot be stolen”

Indian Standard
GEOTEXTILES-METHODFOR
DETERMINA~ONOFCREEP
ICS 59.080.70

0 BIS 1999
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
November 1999 Price Gmup 2
ceJzetoeG us+: lairtsuduI scirbaF lanoitceS ,eettimmoC XT 30
FOREWOI” ,r
sihT naidnI dradnatS was detpoda yb eht uaeruB fo naidnI Standards, retfa eht tfard dezilanif yb eht selitxetoeG
and rtsudnl laI scirbaF eettimmoKanoitceS had neeb devorppa yb eht elitxeT noisiviD .licnuoC
selitxetoeG itt : gnieb desu ylgnisaercni ni eht tnemecrofnier fo lios serutcurts and .skrowhtrae An tnatropmi
citsiretcarahc fo eseht ,slairetam as fo all plastics, is that rieht noitagnole rednu a tnatsnoc daol is a noitcnuf fo
,emit that is yeht tibihxe dekram peerc ,scitsiretcarahc ni that eht noitacilppa fo daol yam dael yletamitlu ot
.erutpur esehT scitsiretcarahc era osla detceffa yb ,srotcaf-latnemnorivne ni ,ralucitrap .erutarepmet noitamrofnI
no peerc is thus laitnesse rof noitceles fo selitxetoeg .tnemecrofniersa
sihT standard is desab no SB 6906 : traP 5 : 199 1 sdohteM fo tset rof traP-selitxetoeg 5 : noitanimreteD fo .peerc
nI gnitroper eht stluser fo a tset ro sisylana edam ni ecnadrocca htiw this standard, fi eht lanif ,eulav devresbo ro
detaluclac is o1 eo dednuor ,ffo ti shall eb enod ni ecnadrocca htiw SI :2 1960 seluR‘ gnidnuor-rof ffo laciremun
seulav ( .‘?*esivew
IS 14739: 1999
Indian Standard
DOHTEM-SELITXETOEG ROF
NOITANIMRETED FO PEERC
1 SCOPE 5 NUMBER OF TESTS
sihT dradnats sebircsed a dohtem for gninimreted the Creep tests llahs eb deirrac tuu at sdaol of 20 ,tnecrep
emit-niarts-daol pihsnoitaler of selitxetoeg at a nevig 30 ,tnecrep 40 tnecrep dna 60 tnecrep of the mumixam
erutarepmet morf a seires of tnatsnoc daol tests. daol per tinu htdiw for the lairetam denimreted ni
ecnadrocca htiw SI 13 162 (Part 5). stseT at lanoitidda
2 REFERENCES
sdaol yam eb etairporppa for emos .slairetam
ehT gniwollof sdradnats niatnoc snoisivorp hcihw
hguorht ecnerefer ni the text, etutitsnoc noisivorp of 6 SUTARAPPA
siht .dradnats tA the emit of ,noitacilbup the snoitide
6.1 Loading Apparatus
detacidni were .dilav llA sdradnats are tcejbus ot
noisiver dna seitrap ot stnemeerga desab no siht It stsisnoc of a gnidaol emarf yltneiciffus gnorts so as
dradnats are degaruocne ot etagitsevni the ytilibissop ton ot mrofed or etarbiv nehw ni .esu tI llahs edivorp
of gniylppa the tsom tnecer snoitide of the sdradnats access for the nemiceps ot eb ,detnuom the daol ot eb
detacidni :woleb yltcerroc ,deilppa dna niarts .derotinom ehT -cennoc
snoit neewteb swaj dna gnidaol sutarappa llahs evah
SI .oN Title tneiciffus modeerf (for ,elpmaxe lasrevinu )stnioj ot
SP45: 1988 koobdnaH no yrassolg of erusne that the daol si deilppa ylmrofinu across the
selitxet smret htdiw ofthe .nemiceps ehT swaj llahs pirg the nemiceps
htiw tneiciffus ssenmrif ot wolla muminim .egappils
:)5traP(26131 1992 sdohteM-selitxetoeG of :tset
yehT llahs ton esuac egamad ron ecudorp areas of
Part 5 noitanimreteD of elisnet
ssenkaew edistuo the eguag .htgnel
seitreporp gnisu a ediw htdiw
pirts tuohguorhT the test, the daol llahs eb nwonk dna
:9536 1971 Method for gninoitidnoc of deniatniam tnatsnoc ot nihtiw f 1 .tnecrep erehW the
selitxet daol si deilppa yb snaem of ,sthgiew htiw or tuohtiw a
,revel on daol llec si yrassecen dedivorp that the sthgiew
3 YGOLONIMRET
dna revel oitar evah neeb detarbilac ylsuoiverp dna
roF the esoprup of siht ,dradnats snoitinifed as nevig that the revel has neeb decnalab htiw the detaicossa
ni PS 4.5 dna as nevig woleb llahs .ylppa waj ni .ecalp
3.1 Decade of emiT ehT noisnet-erp llahs eb 1.0 f 0.2 tnecrep of the
ehT lavretni neewteb the deificeps emit dna sti elpitlum mumixam daol per tinu htdiw denimreted ni ecnadrocca
,netfo for ,elpmaxe 001neewteb sruoh dna 1000 .sruoh htiw SI 13 162 (Part 5). A elpmis gnidaol ecived si nwohs
ni .giF 1.
3.2 Isochronous Curve
NOTES
A evruc hcihw setacidni the niarts of a lairetam rednu
daol for a deificeps ,emit dettolp as daol tsniaga .niarts 1 nI gningised revel epyt sutarappa ralucitrap noitnetta
dluohs eb diap ot eht stimil no revel tnemevom
NOTE - sevruC rof a egnar fo semit era yllareneg dettolp yrassecen ot niatniam siht .ecnarelot *
no eht emas .margaid 2 sihT sutarappa sah neeb detceles sa a elpmis snaem fo
gnihsilbatse orez niarts hguohtla ti si dezingocer sa ton
3.3 Load .laedi
ehT daol ni snotwen per ertem htdiw deilppa ot the
6.2 Extensometer(s)
,nemiceps gnidulcni a noisnet-erp hcihw si deilppa at
tnemecnemmoc of the test. Strain of the elitxetoeg rednu daol llahs eb derusaem
neewteb two senil nward across the htdiw of the
4 ELPICNIRP
,nemiceps lellarap ot each other dna ot the swaj dna at
A test nemiceps si depmalc yb swaj at rehtie dne across a muminim gnicaps of,100 .mm fI the ssam of the
sti .htdiw A tnatsnoc daol si deilppa ot the .nemiceps retemosnetxe tnempiuqe exceeds 1 tnecrep of the
niartS si derusaem at deificeps emit .slavretni deilppa daol na etairporppa noitcerroc llahs eb edam ot

NOTE - ehT emit ot erutpur yam osla eb .denimreted the .daol nI ,lareneg two sretemosnetxe are yrassecen
.GIF 1 PEERC RETSET
no etisoppo sedis dna sdne ofthe ,nemiceps morf hcihw tnereffid snoitisop across the htdiw of the yrotarobal
the egareva gnidaer llahs etasnepmoc for tnemngila .elpmas sselnU esiwrehto ,deificeps take on snemiceps
errors. ehT retemosnetxe llahs wolla for a noituloser of reraen naht 100 mm morf the egdevles or edge of the
0.000 2 (0.02 )tnecrep ,niarts dna egnarsti llahs eb so .elitxetoeg tuC snemiceps lellarap ot the warp (or
detceles that ti lliw etadommocca lairetam noisnetxe enihcam )noitcerid of the .elitxetoeg
gnirud at tsael the tsrif ruoh of gnitset tuohtiw
tseT nemiceps llahs eb 50 mm ,ediw dna yltneiciffus
gnideecxe sti stimil of noitarbilac dna tuohtiw
gnol ot wolla a noitarapes of 200 mm neewteb the .swaj
.tnemtsujda

roF-ETON nevow selitxetoeg that ,yarf tuc each
nI-ETON ecalp- of retemosnetxe a elpmis tnemegnarra
nemiceps 10 mm rediw naht eht lanif htdiw dna neht
sa nwohs ni .giF 1 yam osla eb .desu evomer na lauqe rebmun fo sdaerht morf hcae edis ot
niatbo eht dehsinif .noisnemid sihT spleh niatniam eht
7 GNINOITIDNOC DNA GNITSET ATMOSPHERE
nemiceps ytirgetni gnirud eht .tset
sselnU esiwrehto ,deificeps the test snemiceps roF sehsemoeg or sdirgoeg choose a nemiceps htdiw
llahs eb ,denoitidnoc dna the test detcudnoc ni the that sniatnoc a elohw rebmun of sbir dna at tsael eno
dradnats erehpsomta for gnitset selitxet as denifed ni row of sedon or srebmem-ssorc nihtiw the eguag
SI 6359. .htgnel
ynA erutraped morf these ,snoitidnoc for elpmaxe eud erehW ,etairporppa draw ruof lellarap senil gninnur the
ot power ,eruliaf llahs eb deton ni the lanif report. lluf htdiw of the ,nemiceps ralucidneprep ot the htgnel
,noisnemid the renni two separated yb 100 mm dna the
SETON
retuo two yb 200 .mm
1 ehT tnemeriuqer rof a deificeps evitaler ytidimuh yam
eb dexaler ro ,dettimo fi ti nac eb nwohs taht eht lairetam enimaxE snemiceps for yna sngis of egamad or
si ton evitisnes ot .ytidimuh
.snoitcefrepmi fI yna snemiceps are ,detcejer siht llahs
2 gnitseT ta rehto serutarepmet lliw netfo eb .deriuqeT
eb .deton
dednemmoceR lanoitidda erutarepmet era OI f ,C”2
noitidnoC each test nemiceps for at tsael 48 sruoh ni
04 f C’2 dna 06 k .C°2
the test tnemnorivne (see 7). Do ton tcejbus the
8 TEST SPECIMENS nemiceps ot yna stress or niarts hcihw dluoc affect sti
roF elitxetoeg ,scirbaf take snemiceps at modnar morf tneuqesbus .ecnamrofrep

2
1s 14739 : 1999
9 PROCEDURE 9.5 Measurement of Strain
9.1 Setting Up erusaeM niarts dna emit ,ylsuounitnoc or at slavretni
as nevig ,woleb after the daol si .deilppa Record the
ehT ,sutarappa gnidulcni the ssam of the ,swaj llahs eb
emit of .gnidaol retfA na espale of 10 X the doirep of
decnalab erofeb the nemiceps si .detnuom tnuoM the
,gnidaol take ton ssel naht the gniwollof rebmun of
test nemiceps yllartnec in the jaws with the swaj .lellarap
stnemerusaem :
erehW ,etairporppa do siht yb gnivah the retuo two
,senil hcihw were ylsuoiverp drawn 200 mm apart across ruoF nihtiw the tsrif 0. I ;sruoh
the htdiw of the ,nemiceps denoitisop as esolc as
ruoF erom nihtiw the tsrif 1 ;ruoh
elbissop tnecajda ot the edisni edges of the reppu dna
ruoF erom nihtiw the txen 10 ;sruoh
rewol .waj ekaT care that the nemiceps htgnel ni the
enihcam noitcerid si lellarap ot the noitcerid of ruoF erom nihtiw the txen 100 ;sruoh
noitacilppa of force. hcattA the sutarappa for gnirusaem
ruoF erom nihtiw the txen 1 000 ;sruoh dna
.niarts
ruoF erom nihtiw the txen 10 000 .sruoh
9.2 Application of Pre-tension
ekaT lanoitidda sgnidaer fi there si yna ytilibissop of a
ylppA the noisnet-erp hcihw sedulcni yna daol eud ot
egnahc ni ,snoitidnoc hcus as erutarepmet or ytidimuh
the ssam ofthe .swaj fI ,elbissop record the niarts erofeb
snoitairav or stnemtsujda ot the .sutarappa
noitacilppa of the noisnet-erp tub do ton edulcni ti ni
the llarevo eulav of .niarts sselnU esiwrehto ,deificeps the noitarud of gnitset llahs
eb ton naht~ssel 100 .sruoh ,revewoH dnoyeb siht emit
9.3 Measurement of Dimensions the test nac eb detaniirrret at yna tniop~ fi there si on
yrraC tuo stnemerusaem after noitacilppa of the -erp egnahc ni creep neewteb two evisseccus .sgnidaer
.noisnet enimreteD the nemiceps htdiw morf the egareva
tsujdaeR yna retemosnetxe that reaches sti timil of
of three ,stnemerusaem each edam at tnereffid snoitisop
tnemerusaem or timil of ycarucca as yldipar as elbissop
ni the eguag htgnel of the detnuom nemiceps htiw a
dna ekam a gnidnopserroc noitcerroc ot rehtruf
noituloser of 0.5 .mm enimreteD the nemiceps htdiw of
.sgnidaer
a dirgoeg morf the rebmun of sbir rednu daol deilpitlum
yb the egareva bir gnicaps as denimreted morf three etaulavE the stluser at raluger slavretni dna tcepsni
stnemerusaem at separate snoitisop no the .lior the nemiceps for sngis of egamad or .eruliaf
enimreteD the eguag htgnel morf the egareva of two NOTE - It may be necessary to establish a failure
stnemerusaem neewteb the renni two senil nward no criterion which is indicative of unserviceability other than
total separation of the specimen.
the ,nemiceps ot hcihw are attached the retemosnetxe
.spmalc Make stnemerusaem at etisoppo sdne dna sedis etanimreT a test rehtie nehw the nemiceps has ,deliaf
of the ,nemiceps correct ot the 0.5 .mm or at the dne of the deificeps .doirep fI the nemiceps
has ,deliaf eton the erutan of the .eruliaf fI ti has ton
9.4 Application of Load ,deliaf eton sti ,htdiw dna yna sngis of lacol niarts or
ylppA the daol ylhtooms tub yldipar ot the nemiceps egamad erofeb gnivomer .ti
at a rate hcihw lliw ton esuac yna .dnuober sihT yam
10 RESULTS
eb checked rehtie yb gnirotinom niarts or yb a daol llec
detnuom in seires htiw the dne of the .nemiceps ehT 10.1 Evaluation
gnidaol emit gnidulcxe yna noisnet-erp llahs eb neewteb
etaulavE the stluser ni the gniwollof rennam :
2 sdnoces dna 60 sdnoces dna llahs eb recorded.
a) Load : express ni snotwenolik per ertem (or for
NOTES
pirts stnemele ni ;)snotwenolik
I Particular attention should be paid to adjusting the
mechanism to maintain levers within their calibrated )b :niartS express ni tnecrep or ni etulosba smret
limits (see 5.1) and to avoid any undue load on or gnikat the nemiceps htiw the noisnet-erp deilppa
distortion of the specimen when making such
as gnidnopserroc ot zero ;niarts dna
adjustments.
2 Starting time is the~moment at which the full load is c) :emiT express ni .sruoh
first applied to the specimen.
htiW niatrec swaj hcus as rellor spirg the nemiceps lliw 10.2 Graphical Presentation
pils gnirud .gnidaol fI siht egappils si nees ot eb nevenu tolP the stluser as strain against the logarithm of time.
across the htdiw ofthe ,nemiceps for elpmaxe yb erutavruc neviG tneiciffus ,ytiralc tolp the stluser morf tests at a
of eno of the retuo two ,senil nodnaba the test. egnar of sdaol no the emas margaid (see .giF 2).

3
IS 14739 : 1999
Loads in kN/m
L-.
Moasuroments upto 10 x loading time
I I I I I
Log (time)
FIG. 2 STRAIN/TIMRE ELATIONSHE-
I I TESTREPORT ;derusaem
gnidaoL ;emit
11.1 ehT test report llahs edulcni the gniwollof h,
:sralucitrap )j sgnidaeR of niarts tsniaga ;emit
a>
rebmuN dna raey of naidnI ;dradnatS NOTES
b) noitacifitnedI of the elpmas ;detset 1 esehT yam eb tabulated or .dettolp
C> Load ;desu 2 noitatneserP fo suonorhcosi sevruc for 1 hour,
10 ,sruoh 100 sruoh dna rehtruf ,sedaced fi elbaliava
4 tseT ;tnemnorivne si osla .dednemmocer
>e
yraropmeT serutraped morf latnemnorivne or k) sliateD of elisnet or mret-trohs creep tests deirrac
daol ;snoitacificeps tuo no tnecajda ;snemiceps
6 sliateD of the gnipmalc ;tnemegnarra )ni emiT ot yna eruliaf dna the erutan of ;eruliaf dna
g) noisnet-erP dna gnidnopserroc ,niarts fi )n eguaG htgnel dna htdiw tested.
Bureau of Indian Standards
SIB is a yrotutats noitutitsni dehsilbatse rednu eht uaeruB fo naidnI Standards Act, 1986 ot etomorp
suoinomrah fo~tnempoleved eht seitivitca fo ,noitazidradrats gnikram and ytilauq noitacifitrec fo sdoog and
gnidnetta ot detcennoc srettam ni eht .yrtnuoc
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Review of Indian Standards
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sihT naidnI Standard.has neeb depoleved morf :toD .oN XT 30 .)5710(
Amendments Issued Since Publication
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