Tiêu chuẩn iso 08656 1 1988 scan

creme ts may be div id d in ord r to hav e a re erv e sample te tin properie in th “a s-e eiv ed” c on itio... F or lower bulk denities, the mas of the inc rement may b determined by mul

INTERNA TIONA L STANDARD

faqo ntk prkpar& -

F irst e itio

19 8-12-15

IS0 8 5 -l : 19 8 (E)

Foreword

R efactorie

An e A forms a n inte ral p art of this p art of IS0 8 5

0 Interna tiona l O rga niza tion fo r Sta nda rdiza tion, 19 9 0

Printe in Switz rland

R efra ctory products -

p ro u ts, in ord r to in icate th mean v a lu s of a c n ig -

It d e n t a pply to p ro u ts in th form of larg static q a n-

NOT - Dific ulties may b enou tered w hen sa mpln c ertain ty pes

of u s aed prod cts, for example mouldales

were v alid All sta nda rd are s bje t to rev isio , a nd p a rtie to

tain re isters of c re tly v alid Internatio al Sta nda rd

IS0 3 34 : 197 , Sta tistic - Voca bula ry a nd smbols

th c eficie t of variatio

c n ig me t may c n ist of o e or s v era l lots or parts of a lo t

3.4 pckag d u it: Packag d p art of a lot (or e a mple, in a

or a lot, inte d d to s p ly inform io , an po sibly s rv e as a

a la rg r q antity of m eria l

sample

in pec tio or for la b oratory te ts

s itab le man er for s b jetio to p a rtic lar te ts (or e a mple,

c mpo itio , ph sica l or oth r p rop erie )

1) T o b publs ed

1

4 Genera l rules

into in iv id a l tet lots, for e ample, if it is clea r that th c n-

s p a ra te p artial q antitie

time o f pa cka gin , ha v e be n fie with s ce siv e la yers of

This sa mpln meth d is e pe siv e as it re ults in la rg q a n-

meth d d s ribe in 4 3 s a ll be p refere

mas

(s e tab le 2)

5.1.1 Id ntify th te t lo t, ie of th c n ig me t or p art of

ta nsp or c n itio s, etc )

for th te ts prov id d for (s e n te 3 to tab le 1)

tab le 2, 5.3 a nd 5.4)

a cc rdan e with tab le 2)

(s e 5.5)

with 5.5

creme ts) may be div id d in ord r to hav e a re erv e sample

te tin properie in th “a s-e eiv ed” c on itio

m eria l

Table 1 - Minimum mas of inc reme t

m

> 10

10

5

2

10

3

1

NOT S

inc reme t

15 kg

5 kg

2 k

50 g

20 g

5 9

1 T he mases of the inc rements rela te to a bulk den ity grea ter

than 1 g/ e s F or lower bulk denities, the mas of the inc rement

may b determined by multiply in the n meric al v alue in the ta ble

by the bulk denity of the m erial

2 Spc ial agrements sould b made in the c ase of very lumpy

prod c ts

minimum mas of the inc rement c an b determined, not from the

gra in size of the c oa rsest a ggregate, but from the maximum size of

the gra in of the material bfore ag regatin

3 T he ac tual inc rement mases sould deen on the sampln

eq ipment an the tests to b prformed T his is the c ase for u -

saed prod c ts if the phy sic o-mec hanic al proerties of spc imen

ta ken from these prodc ts a re to b determined

5.2.2

5.3.1

propery, d sig ate re pec tiv ely by p a nd c r, d f in th c oefi-

c ie t of variatio olu of this propery

Expre s d in prac tic e as a perc enta ge

v = 10 0// A

5.3.2

The v alu s of h c oefic ie t of variatio a re divid d into

5 % < v < 15 % me ium va ria tio , clas 2

15 % < v < 3 % la rg variatio , clas 3

varianc e meth d or analy sis

Wh n this is d n , a propery is im e iately as ig e to a clas

of variatio It may be tha t th mo t c ritic al c oefic ie t of varia-

inc reme ts in ta ble 2

if it is grea ter tha n 3 , u e th clas 3 valu s (la rg variatio s) of

ta ble 2 (s e e ample in 5.6)

precisio

a tio v

The c oefic ie t of va riatio of th d terminatio of a propery

v, =*

as:

Jr;

(2)

propery c ho e a spec ific sampln prec isio fit is obta in d :

41 2

G

spec ifie in ta ble 2 T he valu of n given in ta ble 2 is a minimum

spec ifie in th ta ble

F or ex ample :

-

if a lower sampln prec isio is c on id re s fic ie t f or

- or if a greater prec isio is re uire ,

3

If oth r properie whic a re bein d termin d by formin a

bulk sample have c oefic ie ts of varia tio dif fere t fom tha t of

f er fom th valu s given in ta ble 2 a nd can be c alc ulate fom

ba gs, sacks, etc , th n inc reme ts as spec ifie in ta ble 2 s al

p c kag d u its in th te t lot is le s tha n n, th same n mber of

NOT - T he c oefic ie t of varia tio of h material in an first b tc h

s o ld be d termin d in ac c ordanc e with IS0 8 5 -2

I

C las of dev iation of the proerty

%

I

4

4

6

8

12

16

2

5,0

5,0

5.0

4,0

3 4

2,8

2,5

2.24

4

6

8

t

12

16

24

3

40

6

1212

12

8.6

16

7,5

24

6.12

15 < v < 3

n

n

8

8

12

16

24

3

48

64

8

12

16

24

3

48

64

8

L%

81

2

21.21

17.3

15,0

12,2

IO ,61

8,6

7.5

6.71

21,21

17.3

15,0

12,2

IO ,61

8,6

7.5

6.71

m

10 k

10 < In < 5 0

5 0 < m < 10 0

1 00 < m

obta in d if th inc reme ts a re tak n fom th material in mov e-

me t (s e 4.3 a nd 4.4) However, if h prac tic al d lvery c on i-

c n ig me t a nd s al be takn a t re ula r po d ra l or temporal

v als as th re a re in reme ts to be tak n Initial sampln s al

NOT - The term “po d ra l” d sc ribe fix ed intervals of mas

v als, u ti this pro e s is c omplete

s fic ie t amo nt

0,017 6

3.51

stan a rd d via tio : o= 0,017 6 g/ c 3 J

= 0’5 4/

n mber of in reme ts: 6 (s e ta ble 2)

0,8

1

n mber of inc reme ts: 12 (s e ta ble 2)

5.6.3 Paric le siz of a refa c tory c onc rete ( <IO m )

a) if o ly th fac tio of h big e t p ric le is to be d ter

ta in d :

1

It c an be c onc lu e tha t this is a “la rg ” varia tio (clas 3)

n mber of in reme ts: 24 (s e ta ble 2)

ord r to be s re tha t th bulk sample a de uately repre e ts

th lot with re a rd in p ric ula r to th low perc enta ge of p a r-

tic le > 4 m :

b ) b ut, if th factio of p article >2 m is to be d ter

ob tain d :

I 4,2

standard d viatio : 4 ,2 %

3 ,5

(class 2)

n mber of in reme ts: 12 (s e tab le 2)

s le cte

b ulk sa mple a nd of te st p orio s for analy is for d terminin th

itse lf T his s all be th s b je t of a gre me ts e s rin that th

p rep aratio s (div isio , mixin and, wh re ap p licab le, cru hin )

T he lab oratory sa mple s all be k ep t in s itab le c ntain rs

a)

s b je te to in p ectio ;

b )

cl

e)

da te a nd p lace of samp lin ;

f l

date a nd p lace of p rep aratio of samp le ;

9)

a ny oth r d tails re uire

of a p rop erty

NOT - T he v a lu s giv n for re lativ e p re isio (PI in this claus are

ab solute valu s, wh rea s th s giv en in oth r claus s are e pre s d a s

to eth r to form th b ulk sa mp le fom whic , afer inte siv e

minatio s of th p rop ery in q e tio

b ) p rep aratio of th sa mple fo r te stin , with a standard

with a standard d v iatio ~7s

and th n its c eficie t of v ariatio , is th p rin ip al b asis for th

IS0 6 5 -2

If m d terminatio s are mad of o e p rop ery, th final re ult is

,1

1

c

x i

i= 1

giv n a s a fu ctio of th sta ndard d v iatio s o l, o a nd o a nd

tot =

\i

-+ ;+-

bab ilty 0,0 is giv n by th e uatio

with

6

PL = 2a 2,

Jm

I

I

5

T he mean x an its prec isio p permit d terminatio of h c on-

that is,

X-p p F +p

of 10 to n s to 5 to n s a nd f or a c oefic ie t of varia tio of

le s tha n 5, ta ble 2 giv es th n mber of in reme ts n = 6, with

a sampln prec isio of f it = 4,0 %, ie f or eac h 4 to n s of

NOT - A n ex ample of h w this c an b doneis s own in fig re 1

Conig ment

(a ilwa y wagon)

2t

Maximum

gra in

size

,

6

5kg

A

/

/ ’

/’

Annex A

(norma tiv e)

If it is po sible to stop th b elt, two p artitio s (or e ample,

pla nks) are fite d at a dista nc greater than or e ual to fo r

C a refuly c le t all th m eria l betwe n th s p artitio s

mean of a n artic ulate arm), ta ke ca re to re ov er all th mas

interc ep te

or conta iner

ful h ig t

F or sample ta ke u in a s o p, mak e a h low as far as po s-

ib le d wn to a d p th at least e ual to half th d p th of th load

tain rs (s e e ample in fig re A I)

at l/ 3 of th d p th, or 213 of th d pth or at th botom

up u in a r ifle div id r (or oth r s itab le d v ic ) a nd u e o e

7

Example I

8

UDC 6 6.7 : 62 1 -

De criptors : refa c to / materials, u sa e refa c torie , raw materials, sampln