Tiêu chuẩn iso 06935 2 2015

© ISO 2015 Steel for the reinforcement of concrete — Part 2 Ribbed bars Aciers pour l’armature du béton — Partie 2 Barres à verrous INTERNATIONAL STANDARD ISO 6935 2 Third edition 2015 12 15 Reference[.]

Steel for the reinforc ement of

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© ISO 201 , P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on the internet or an intranet , w ithout prior

written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

F reword i v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Symbols 1

4 Terms and definitio s 2

5 Dimensions, mas per unit leng th and per mis ible deviatio s 4

6 Req irements for r ibs 5

7 Chemical c omposition 7

8 Mechanical properties 9

8.1 Tensie prope ties 9

8.2 Bending pr ope ties 1

8.3 Rebending pr ope ties afe ag eing 1

8.4 Fatig ue pr ope ties 1

9 Testing 11

9.1 Tensie tes 1

9.2 Conditionsof tes ing

1 9.3 Bend tes 1

9.4 Rebend tes 1

9.5 Fatig ue tes 1

9.6 Chemical composition 1

10 Desig natio 12

11 Mar king 13

1 1 Mar king on the b r 1

1 2 Mar king of bu dles 1

12 Evaluatio of c onfor mity 13

1 1 General 1

1 2 Ev luation of conformity d ring pr od ction 1

1 3 A cc ptanc testing of a spe ific delve y 14

1 3.1 General 14

1 3.2 Ev luation of characte istic v lues 14

1 3.3 Ev luation of spe ified minimum/max imum v lues 1

1 3.4 Tes report 1

A nne x A (informative)F ur e xamples of mar king systems for rib ed bar s 17

A nne x B (informative)Optio s for ag r eement betwe n the manufacturer and pur chaser 22

Biblog raphy 23

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the fol owing URL: F or word - Sup lementary information

The committ ee r sp nsible for this document is ISO/TC 1 , Ste l, Subcommitt ee SC 1 , Ste l s fr the

r inorc ement a d pr s tr s s in o c onc rete

This third edition canc ls an r plac s the se on edition (ISO 6 3 - 2:2 0 ), w hich has be n t ech icaly

r vised The main chang es ar in Ta le 4, Ta le 5, Ta le 6, 9.1, 9.2 (new), 1 1 an 1 2

ISO 6 3 consis s of the folowing p rt , u de the g ene al title Ste l fr the r in orc ement o c onc rete:

— Part 1: Plain b rs

— Part 2 : Rib ed b rs

— Part 3 : Welded fbric

Steel for the reinforc ement ofc oncrete —

This p rt of ISO 6 3 is a plca le t o st eel delve ed in theform of b rs, coi s an de-coied prod ct It

inclu es b th welda le an non-welda le st eels

The prod ction proc s is at he disc etion of the man factur r

It isnot a plca le t o rib ed b rs prod c d from finished prod ct , such as plat es an raiwa rai s

2 Normati ve r eferences

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

ISO 404, Ste l a d s te l produc ts — G ene al technic al deliver y r q ir ments

ISO/TR 9769, Ste l a d iro — R ev iew o a aia le meth ds o a alys i s

ISO 1 14 , Certific atio s cheme fr s te l b rs a d w ir s fr the r inorc ement o c onc rete s truc tur s

ISO 142 4, Ste l a d iro — S mpln a d pr p ratio o s amples f r the dete min tio o chemic al

Table 1 — Symbols

d mm Nominal diamet er of the b r Clause 5, Clause 6, 9.1, 9.2,

m

n

R

eH

MPa a

R

m

MPa a

R

p ,2

MPa a

0,2% pro f strength, non-proportional e tension 8.1

s — Stan ard deviation for n in ivid al values 1 3.2.3.1

x

i

β De re Transver e-ribinclination

4.1 , Clause 6

a

1MPa = 1 N/mm

2

4 Terms and definitions

F or the purposes of this document, the fol owing t erms and def initions a ply

4.1

cast analy sis

chemical analy sis r pr sentative of the cas det ermined b the man factur r in ac ordanc with it

own proc d r s

[ SOURCE:ISO 1 0 0:2 0 , 2.4.3, modif ied.]

4.2

co formity as es ment s heme

conformity as es ment y st em r lat ed t o spe ific o je t of conformity as es ment, t o w hich the same

spe ified r q ir ment , spe if ic rules and proc d r sa ply

Note 1 to entry : Conformity as es ment s hemes may b operat ed at an international, national or ub-national level

Not e 2 t o entry: Certif ication, i.e third party at estation relat ed to prod cts, proces es, sy stems or per ons, is

ap lica le t o al o jects of conformity as es ment ex cept or conformity as es ment b dies themselves, t o which

ac reditation is ap lica le

4.3

characteristic value

v lue ha ing a pr sc ibed pro a i ity of not being at ained in a hy othetical u lmit ed t es se ies

Not e 1t o entry: eq ivalent o “fractile”, which is def ined in ISO 3 34-1:2 06

Note 2t o entry: a nominal value is used as the characteristic value in some cir umstances.

[ SOURCE:ISO 1 0 0:2 0 , 2.4.1 , modif ied – ad ed Not e 2.]

4.4

core

p rt of the c os -se tion of the b r not containing eithe ribs or in entations

[ SOURCE:ISO 1 0 0:2 0 , 2.2.5, modif ied.]

4.5

ducti ity clas

clas ification of the d cti ity pro e ties of r infor ing st eels b sed on the v lue of the ratio of t ensi e

s r ngth t o yield s r ngth, as wel as the elong tion measur d eithe as A

uniform contin ous rib p ralel t o the a is of the b r

[ SOURCE:ISO 1 0 0:2 0 , 2.2.7.1, modif ied.]

4 7

S

0

nominal c os -sectio al are

c os -se tional ar a eq iv lent t o the ar a of a cir ular plain b r of the nominal diamet er

[ SOURCE:ISO 1 0 0:2 0 , 2.2.1 , modif ied.]

4.8

pro uct analy sis

chemical analy sis car ied out on theprod ct

[ SOURCE:ISO 1 0 0:2 0 , 2.4.4 ]

4 9

relative rib are

f

ar a of the proje tions of al transve se ribs within a def ined length on a plane pe pen icular t o the

longitu inal a is of the b r, divided b this length an the nominal cir umfe enc

[ SOURCE:ISO 1 0 0:2 0 , 2.2.1 , modif ied.]

dis anc betwe n the c ntr s of two conse utive transve se ribs measur d p ralel t o the a is of the bar

Note 1t o entry: se Figure 1

[ SOURCE:ISO 1 0 0:2 0 , 2.2.1 , modified.]

ribles perimeter

Σ

i

sum of the dis anc s along the surfac of the cor betwe n the en of the transve se ribs of adjac nt

row s measur d as the proje tion on a plane pe pen icular t o the a is of the b r

[ SOURCE:ISO 1 0 0:2 0 , 2.2.1 , modif ied.]

angle betwe n the flan of a transve se rib an thecor surfac of a b r measur d pe pen icular t o the

longitu inal a is of the transve se rib

Not e 1t o entry: se Figure 2

[ SOURCE:ISO 1 0 0:2 0 , 2.2.9, modif ied.]

4.1

transver e-rib inclnatio

β

angle betwe n the rib an the longitu inal a is of the b r

Not e 1t o entry: se Figures 1, 3 an 4

[ SOURCE:ISO 1 0 0:2 0 , 2.2.8, modified.]

5 Dimensions, mas per unit leng th and permis ible deviations

Dimensions, mas pe u it length and pe mis ible deviations ar given in Ta le 2 By a r ement

betwe n the man factur r an pur hase , rib ed b rs w hose nominal diamet ers ar othe than those

shown in Ta le 2 ma be used A l s of o tions for a r ement betwe n the man factur r an pur hase

is pro ided in Annex B

Table 2 — Dimensio s, mas per unit length an permis ible deviatio s

Nominal b r diamet er

a

Nominal c os -se tional

ar a b

Diameter larger than 50 mm should be agre d betw een the man fa turer an p rchaser The permis ible deviation

on mas for such bar shal be ± 4 %

d

Permis ible deviation refer to a sin le bar

The delve y length is subje t t o a r ement between the man factur r an pur hase

NOTE Common delivery lengths of straight b r are 6 m, 9 m, 1 m an 1 m

Unles othe wise a r ed, the pe mis ible deviation on delve y lengths from rol ng mi shal be

0

+

mm

6 Requir ements for ribs

Rib ed b rs shal ha e transve seribs Longitu inal ribs ma be pr sent or not

The e shal be at leas two row s of transve se ribs eq al y dis ribut ed aroun the pe imet er of the b r

The transve se ribs within each row shal be dis ribut ed u iformly o e the entir length of the b r,

ex cept in the ar a of marking

Ribs shal conform t o the r q ir ment in Ta le 3

Table 3 — Req irements for transver e ribs

Ribles perimeter, Σ

i

R eq ir ment for rib p ramet ers ma be spe if ied b the r lative rib ar a, or b a r ement betwe n

the man factur r and pur hase Measur ment of rib p ramet ers shal be pe formed in ac ordanc

with ISO 1 6 0-1

Dimensions def ining the rib g eometry in Ta le3 ar shown in Figur s 1 t o 4

When longitu inal ribsar pr sent, their height shal not ex ce d 0,1 d

Figure 3 — Example of ba with varying rib incl natio s to the lo gitu inal axis

Figure 4 — Example of bar with transver e ribs of uniform height (β = 90°)

7 Chemical composition

The chemical comp sition of the st eel, as det ermined b cas analy sis, shal conform t o Ta le 4

Calculat e the carbon eq iv lent, CEV, ac ording t o F ormula (1):

(1)

w he e C, Mn, Cr, V, Mo, Cu an Ni ar the mas fractions, ex r s ed as pe c ntag es of the r spe tive

chemical element of the st eel

The pe mis ible deviation of the prod ct analy sis r lative t o the cas analy sis as spe ified in Ta le 4 is

given in Ta le 5

Table 4 — Chemical composition based on cast analy sis — Maximum values of mas fractio s,

in per entag e

St eel grade

a

C b

The fir t B” s an s for s e l for reinforcin c ncrete The ne t 3digit represent he spe ified chara teris ic value of

minimum u per yield s ren th The f ifh symbol s an s for d cti ty clas (4.5) The sixth symbol relates to w eldin ;

“-me ns not inten ed for weldin an “W” me ns inten ed for weldin The las “R ” s an s for rib ed bar

b

For B 0 AWR, B 0 BWR, B 0 CWR, B50 AWR, B50 BWR an B50 CWR with diameter larger than 3 mm, the

ma imum c rbon c ntent (C) is 0,2 % an the ma imum c rbon eq ivalent C V) is 0,5 %

Table 5 — Permis ible deviatio in pro uct analy sis in per entag e by mas

Element Spe ified ma imum v lue in cas

analy sis in Ta le 4

%

Pe mis ible deviation in prod ct anal

y sis from the spe ified l mit of the

The t ensie t es shal be pe formed in ac ordanc with 9.1

The mate ial shal conform to the r q ir ment for spe if ied characte is ic tensie pro e ties

spe if ied in Ta le 6

In the cont ext of this p rt of ISO 6 3 , the charact eris ic v lue is (u les othe wise in icat ed) the lowe

or up e l mit ofthe s atis ical t ole anc int erv l at w hich the e is a 9 % pro a i ty (1 − α = 0, 90)

that 9 % (p = 0,9 ) of the v lues ar at or a o e this lowe lmit, or ar at or below this up e l mit,

r spe tively This def inition r fe s t o the long -t erm q al ty level of prod ction

Table 6 — Tensie pro erties

Ducti ity pro e ties

Spe ified ch

rac-t eris ic

v lue of

R

m/ R

eH

Spe ified ch ract eris ic

v lue of elong tion

8

B3 0DWR

1,3 × R

eH(min.)

the ty e of elon ation is not spe ified b agre ment, A

gtshould be used

b

In the c se of the bar with diameter 3 mm or more in d cti ty clas D, the minimum spe ified chara teris ic value

for A may be de re sed b 2% for e ch 3 mm incre se in diameter However, the ma imum dimin tion f om the minimum

spe if ied chara teris ic value s ated in Table 6 is lmited to 4 %

c

1MPa = 1 N/mm

2

By a r ement betwe n the man factur r an pur hase , the v lues shown in Ta le 6 ma be used as

spe ified minimum an / r ma imum v lues

If a yield phenomenon is not pr sent, the 0,2 % pro f s r ngth (R

p0,2) shal be det ermined

8.2 Bending properties

The ben t es shal be pe formed in ac ordanc with 9.3 Aft er t es ing, the b rs shal show neithe

ruptur nor c acks visible t o a pe son of normal or cor e t ed vision

8.3 Rebending pr operties afer ag eing

R eg rding 1 st eel grades of B40 A-R, B40 B-R, B40 C-R, B40 AWR, B40 BWR, B400 WR, B40 DWR,

B42 DWR, B5 0A-R, B5 0B-R, B5 0 -R, B5 0AWR, B5 0BWR, B5 0 WR an B5 0DWR, if r q ir d

b the pur hase , the r ben t es shal be pe formed in ac ordanc with 9.4

NOTE T e re en t est is used t o verify the a eing properties of the b nt b r

Afte tes ing, the b rs shal show neithe ruptur nor c acks visible to a pe son of normal or

cor e ted vision

8.4 F tig ue pr operties

If r q ir d b thepur hase , the man factur r shal demons rat e the fatigue pro e ties of the prod ct

b sed on a ial-for e-controled fatigue t es ing in the fluctuating t ension rang e in ac ordanc with 9.5

The spe if ied n mbe ( ) of s r s cycles, s r s rang e( ) 2σ

a

an ma imum s r s (es) σ

mashal be as

a r ed betwe n the pur hase an man factur r at the time of en uiry an orde

9.1 Tensi e test

The t ensie t es shal be car ied out in ac ordanc with ISO 1 6 0-1

F or the det ermination of pe c ntag et otal elong tion at ma imum for e, A

gt, eq idis ant marks shal be

made on the fr e length ofthe t es pie e

F or det ermination of t ensie pro e ties, the nominal c os -se tional ar a of the b r shal be used

9.2 Conditions of testing

The con itions of t es ing ar given in Ta le 7

Table 7 — C nditions of t esting

Man facturing an del very con itions ofthe

prod ct

C n itions of t es ing (t es pie es )

Prod ced in straight lengths by hot roling As delivered

a

or ag edb

min an

then c oln in s i air toro m temperature The method of he tin is lef tothe discretion of the man fa turer

9.3 Bend test

The ben t es shal be car ied out in ac ordanc with ISO 1 6 0-1

The tes pie e shal be bent to an angle between 1 0° an 1 0° over a man r l of the diamete

spe if ied in Ta le 8