EAS 148-6 Determination of Fineness

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EAS 148-6: 2000ICS 91.100.10

EAST AFRICAN STANDARD

Cements — Test methods

Part 6:

Determination o ineness

EAST AFRICAN C!""#NIT$

© EAC 2000 First Edition 2000



IS!%&D nnn-n

Fore'ord

Development of te East Afri!an Standards as "een ne!essitated "# te need for armoni$in%re&'irements %overnin% &'alit# of prod'!ts and servi!es in te East Afri!an Comm'nit#. It isenvisa%ed tat tro'% armoni$ed standardi$ation( trade "arriers tat are en!o'ntered )en %oods

and servi!es are e*!an%ed )itin te Comm'nit# )ill "e removed.

In order to a!ieve tis o"+e!tive( te Comm'nit# esta"lised an East Afri!an Standards Committeemandated to develop and iss'e East Afri!an Standards.

,e Committee is !omposed of representatives of te -ational Standards odies in Partner States(to%eter )it te representatives from te private se!tors and !ons'mer or%ani$ations. Draft East Afri!an Standards are !ir!'lated to sta/eolders tro'% te -ational Standards odies in te Partner States. ,e !omments re!eived are dis!'ssed and in!orporated "efore finali$ation of standards( ina!!ordan!e )it te pro!ed'res of te Comm'nit#.

East Afri!an Standards are s'"+e!t to revie)( to /eep pa!e )it te!nolo%i!al advan!es. sers of te

East Afri!an Standards are terefore e*pe!ted to ens're tat te# al)a#s ave te latest versions of te standards te# are implementin%.

© East Afri!an Comm'nit# 2000 All ri%ts reserved

East Afri!an Comm'nit#

P.3. o* 1096

Ar'sa

,an$ania

,el: 244 25 2402478

Fa*: 244 25 240244Email: ea!;ea!&.or%

<e": ))).ea!&.or%

© 2000 EAC = All ri%ts of e*ploitation of an# form and "# an# means reserved )orld)ide for EAC Partner States> -Ss

© EAC 2000 All ri%ts reserved ii

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Cements — Test methods

Part 6:

Determination o ineness

1 S(o)e

,is East Afri!an Standard des!ri"es t)o metods for determinin% te fineness of !ement.

,e sievin% metod serves onl# to demonstrate te presen!e of !oarse !ement parti!les and isprimaril# s'ited to !e!/in% and !ontrollin% te prod'!tion pro!ess.

<it te air permea"ilit# metod ?laine@ te spe!ifi! s'rfa!e ?mass related s'rfa!e@ is meas'red "#!omparison )it a referen!e !ement sample. ,e determination of te spe!ifi! s'rfa!e ?mass relateds'rfa!e@ is meas'red "# !omparison )it a referen!e !ement sample. ,e determination of tespe!ifi! s'rfa!e serves primaril# to !e!/ te !onsisten!# of te %rindin% pro!ess of one and te sameplant. ,is metod onl# allo)s a limited assessment to "e made of te properties of te !ement in

'se.1

,e metods are appli!a"le to all te !ements defined in EAS 1 1?see !la'se@.

2 Normati*e reeren(es

,e follo)in% referen!ed do!'ments are indispensa"le for te appli!ation of tis do!'ment. For datedreferen!es( onl# te edition !ited applies. For 'ndated referen!es( te latest edition of te referen!eddo!'ment ?in!l'din% an# amendments@ applies.

EAS 11 Cement – Test Methods – Part 1: Determination of strength

EAS 12 Cement – Test Methods – Part 2: Chemical analysis

EAS 17 Cement – Test Methods – Part 3: Determination of setting time and soundness

EAS 1 1(Cement Part 1: Composition( spe!ifi!ations and !onformit# !riteria for !ommon !ement

IS3 464 : 1990( ,est sieves etal )ire !lote( perforated metal plate and ele!troformed seet -ominal si$es of openin%s.

IS3 7710 1:2000( ,est sieves ,e!ni!al re&'irements and testin% Part 1: ,est sieves of metal)ire !lote

1,e air permea"ilit# metod ma# not %ive si%nifi!ant res'lts for !ements !ontainin% 'ltra fine materials.

© EAC 2000 All ri%ts reserved 0





+42 Che(3in, the sie*e

A%itate te sample of !ement to "e tested "# sa/in% for 2 min in a stoppered +ar to dispersea%%lomerates. <ait 2 min. Stir te res'ltin% po)der %entl# 'sin% a !lean dr# rod in order to distri"'tete fines tro'%o't te !ement.

Fit te tra# 'nder te sieve. <ei% appro*imatel# 10 % of te referen!e material ?7.7@ to te nearest0.01% and pla!e it in te sieve( "ein% !aref'l to avoid loss. Carr# o't te sievin% pro!ed're as in 7..1in!l'din% te repeat determination of resid'e to #ield t)o val'es P1 and P2 e*pressed to te nearest0.1 .

,e t)o val'es of P1 and P2 for satisfa!tor# sieve so'ld differ "# not more tan 0.7 . ,eir mean

P !ara!teri$es te state of te sieve.

iven te /no)n resid'e on te 90 µm mes of te referen!e material. R 0( !al!'late R 0 /P as te

sieve fa!tor ! ( e*pressed to te nearest 0.01. ,e resid'e( R determined as in 7..1 sall !orre!ted

"# m'ltipl#in% "# ! ( )i! ma# ave a val'e of 1.00 ± 0.20.

Ce!/ te sieve after ever# 100 sievin%s.

-3,E An# oter !e!/in% pro!ed're( s'! as te opti!al metods des!ri"ed in IS3 77101 ma# "e 'sed. All sieves sall )ear slo)l# and !onse&'entl# teir sieve fa!tor( ! sall slo)l# !an%e.

+ E5)ression o res/ts

Beport te val'e of B( to te nearest 0.1 ( as te resid'e on te 90 µm ?IS3 464@ sieve for te

!ement tested.

,e standard deviation of te repeata"ilit# is a"o't 0.2 and of te reprod'!i"ilit# is a"o't 0.7 .

-3,E <en tere is lo!al diffi!'lt# in o"tainin% IS3 sieves( te same pro!ed're ma# "e follo)ed )it tenearest availa"le standard sieve "'t te report is to state on )i! standard sieve mes te !ement resid'e as"een determined.

4 Air .ermeai/it7 "ethod /aine "ethod9

41 .rin(i)/e

,e fineness of !ement is meas'red as spe!ifi! s'rfa!e "# o"servin% te time ta/en for a fi*ed&'antit# of air to flo) tro'% a !ompa!ted !ement "ed of spe!ified dimensions and porosit#. nder

standardi$ed !onditions te spe!ifi! s'rfa!e of !ement is proportional to √t )ere t is te time for a

%iven &'antit# of air to flo) tro'% te !ompa!ted !ement "ed. ,e n'm"er and si$e ran%e of

individ'al pores in te spe!ified "ed are determined "# te !ement parti!le si$e distri"'tion( )i!also determines te time for te spe!ified airflo).

,e metod is !omparative rater tan a"sol'te and terefore a referen!e sample of /no)n spe!ifi!s'rfa!e is re&'ired for !ali"ration of te apparat's.




42 A))arats

421 .ermeai/it7 (e//

,e !ell sall "e a ri%id ri%t !#linder of te dimensions and toleran!es so)n in Fi%'re 1 ?a@. It sall

"e of a'tenti! stainless steel or oter a"rasionresistin%( non!orrodi"le material. ,e top and "ottomfa!es sall "e flat and normal to te a*is of te !#linder( as sall te 'pper s'rfa!e of te led%e at te"ottom of te !ell. ,e o'ter s'rfa!e of te !#linder sall "e tapered to form an airti%t fit )it te!oni!al so!/et of te manometer ?IS3 77( oint 1987@.

422 .erorated dis(

,e dis! sall "e of non!orrodi"le metal( perforated )it 70 to 0 oles of 1 mm diameter( and sallave te dimensions and toleran!es so)n in Fi%'re 1?"@. <en in position on te led%e in te !ell(its plane s'rfa!es sall "e normal to te a*is of te !ell.

42+ ./n,er

,e pl'n%er is a piston( !apa"le of slidin% freel# in te meas'rin% !ell "# means of a !learan!e to "eapplied in s'! a )a# tat( )en te !ap of te pl'n%er !omes to rest on te 'pper fa!e of te !ell

!#linder( a distan!e of 14 mm ± 1 mm )ill "e maintained "et)een te 'pper fa!e of te perforated

dis! and te lo)er fa!e of te piston.

,is piston sall "e provided )it a flat !onne!ted to an ann'l's aro'nd te ead to ena"le air toes!ape.

,e pl'n%er sall "e of a'tenti! stainless steel or oter a"rasionresistin% and non!orrodi"lematerialG it sall ave te dimensions and toleran!es so)n in Fi%'re 1?!@. A pl'n%er !an onl# "e 'sed)it te !orrespondin% !ell te dimensions of )i! mat! )itin te permitted toleran!es.

424 "anometer

,e manometer sall "e a ri%idl# and verti!all# mo'nted t'"e of "orosili!ate %lass t'"in% ?IS307@ arran%ed as in Fi%'re 1?d@ and avin% te dimensions and toleran!es so)n in tis fi%'re.

3ne arm of te manometer sall "e provided at te top )it a !oni!al so!/et ?IS3 77( oint 1987@ toform an airti%t fit )it te !oni!al s'rfa!e of te !ell. ,e same arm sall also ave fo'r et!ed linesand a ,+oint )ose positions sall ave te dimensions and toleran!es so)n in Fi%'re 1?d@. ,eside "ran! of te ,+oint sall lead to an airti%t stop!o!/ "e#ond )i! sall "e atta!ed a s'ita"leaspiration devi!e s'! as te r'""er t'"e and "'l" so)n in Fi%'re 1?d@

Fill te manometer t'"e )it te li&'id ?.2.4@ to )et te inner s'rfa!e. Empt# te t'"e and refill it so

tat te manometer li&'id is level )it te lo)est et!ed line ?11 in Fi%'re 1?d@. ,is manometer li&'idsall "e !an%ed ?or !leaned@ after servi!in% or "efore a ne) !ali"ration.

-3,E 3ter forms of !ell and pl'n%er and oter arran%ements of te +oint "et)een !ell and manometer ma# "e 'sed provided tat te# !an "e so)n to %ive te same res'lts as te spe!ified apparat's.

IS3 77: la"orator# %lass)are Inter!an%ea"le !oni!al %ro'nd +oints

IS3 07: Ha"orator# %lass)are orosili!ate t'"in%.




42 "anometer /iid

,e manometer sall "e filled to te level of te lo)est et!ed line 11 in Fi%'re1?d@J )it a nonvolatile( non#%ros!opi! li&'id of lo) vis!osit# and densit#( s'! as di"'t#l ptalate or li%t mineraloil.

426 Timer

,is sall ave a positive startin% and stoppin% me!anism( reada"le to 0.2 or "etter( and a!!'rate to1 or "etter over time intervals 'p to 700 s.

42; a/an(es9

,is sall "e !apa"le of )ei%in% a"o't 7 % to te nearest 1 m% ?for te !ement@ and a"o't 40 % to110 % to te nearest 10 m% ?for te mer!'r#@.

428 .73nometer

,is or oter !onvenient means sall "e 'sed in determinin% te densit# of !ement.

4+ "ateria/s

4+1 "er(r7( of rea%ent %rade or "etter.

4+2 Reeren(e (ement( of /no)n spe!ifi! s'rfa!e.

4++ <i,ht oi/( to prevent formation of mer!'r# amal%am on te inner s'rfa!e of te !ell.

4+4 Cir(/ar dis(s o i/ter )a)er ( avin% a smoot !ir!'mferen!e adapted to te dimensions of

te !ell. ,e filter paper is of medi'm porosit# ?mean pore diameter 5 Km@.

4+ <i,ht ,rease( for ens'rin% an airti%t +oint "et)een !ell and manometer( and in te stop!o!/

44 Test (onditions

,e la"orator# in )i! te air permea"ilit# test is !arried o't sall "e maintained at a temperat're of 24 LC M 2 LC and a relative 'midit# not e*!eedin% 64 . All materials for test and !ali"ration sall "ea la"orator# temperat're )en 'sed and sall "e prote!ted from a"sorption of atmosperi! moist'red'rin% stora%e.

4 Com)a(ted (ement ed

41 asis

,e !ompa!ted !ement "ed !omprises a reprod'!i"le arran%ement of !ement parti!les )it aspe!ified vol'me of air in!l'ded "et)een te parti!les. ,is air vol'me is defined as a fra!tion of tetotal vol'me of te "ed and is termed te porosit#( e.

It follo)s tat te vol'me fra!tion o!!'pied "# te !ement parti!les is ?1 e@. If N is te total vol'me of te "ed( te a"sol'te vol'me of !ement is N?1 e@ in !m 7( and te mass of !ement( m is ON?1 e@ in %)ere is O is te solid densit# of te !ement parti!les in %8!m7.

© EAC 2000 All ri%ts reserved



,'s( /no)in% O( a mass of !ement !an "e )ei%ed to prod'!e a desired porosit#( e( in te!ompa!ted "ed of total vol'me N. ,e determination of O is des!ri"ed in .4.7 and tat of N in .5.1.

42 .re)aration o the sam)/e

A%itate te sample of !ement of "e tested "# sa/in% for 2 min in a stoppered +ar to dispersea%%lomerates. <ait 2 min. Stir te res'ltin% po)der %entl# 'sin% a !lean dr# rod in order to distri"'tete fines tro'%o't te !ement.

4+ Determination o densit7

Determine te densit# of te !ement 'sin% a devi!e s'! as a p#/nometer ?.2.@. se a nonrea!tiveli&'id in te determination. ,e &'antit# of !ement 'sed sall depend on te nat're of te apparat's"'t sall "e s'! tat te val'e of O determined as a!!'rate to 0.01 %8!m 7. Nerif# tis a!!'ra!# "# arepeat determination and re!ord te mean of te t)o determinations to te nearest 0.01 %8!m 7 as tedensit#.

44 Formation o the ed

,o %ive a !ement "ed of porosit# e 0.400 )ei% a &'antit# of !ement( m1( !al!'lated from

m1 0.400 ρ " ?%@ Q?1@

)ere

ρ is te densit# of te !ement ?%8!m7@ ?.4.7@G

" is te vol'me of te !ement "ed ?!m7@ ?.5.1@.

,is mass( !orre!tl# !ompa!ted( sall prod'!e a "ed of porosit# 0.400. Pla!e te perforated dis!?.2.2@ on te led%e at te "ottom of te !ell ?.2.1@ and pla!e on it a ne) filter paper dis! [email protected]'re tat te filter paper dis! f'll# !overs te perforated dis! and is flat "# pressin% )it a !lean dr#rod. Pla!e te )ei%ed &'antit# of !ement( m1

( in te !ell ta/in% !are to avoid loss. ,ap te !ell to levelte !ement. Pla!e a se!ond ne) filter paper dis! on te levelled !ement. Insert te pl'n%er ?.2.7@ toma/e !onta!t )it te filter paper dis!. Press te pl'n%er %entl# "'t firml# 'ntil te lo)er fa!e of te!ap is in !onta!t )it te !ell. Slo)l# )itdra) te pl'n%er a"o't 4 mm( rotate it tro'% 90L and%entl# "'t firml# press te "ed on!e a%ain 'ntil te pl'n%er !ap is in !onta!t )it te !ell. ,e "ed isno) !ompa!ted and read# for te permea"ilit# test. Slo)l# )itdra) te pl'n%er.

-3,E ,oo rapid and vi%oro's pressin% ma# !an%e te parti!le si$e distri"'tion and terefore !an%e tespe!ifi! s'rfa!e of te "ed. ,e ma*im'm press're so'ld "e tat !omforta"l# e*erted "# a t'm" on tepl'n%er.

46 Air )ermeai/it7 test

461 asis

,e spe!ifi! s'rfa!e( S( is %iven in .9.1 "'t is !onvenientl# e*pressed as

( ) g cmt

e

e K S /

.)(

2

7

101

η ρ ×

−

×=

)ere




# is te apparat's !onstant ?.5.2@

e is te porosit# of te "edG

t is te meas'red time ?s@G

ρ is te densit# of !ement ?%8!m7@ ?.4.7@G

η is te vis!osit# of air at te test temperat're ta/en from ,a"le 7 ?Pas@.

<it te spe!ified porosit# of e 0.400 and temperat're of 20 °C ± 2 °C

)/(.

g cmt K

S 2

2426

ρ

×=

462 .ro(edre

Insert te !oni!al s'rfa!e of te !ell into te so!/et at te top of te manometer( 'sin% if ne!essar# alittle li%t %rease ?.7.4@ to ens're an airti%t +oint. ,a/e !are not to dist'r" te !ement "ed.

Close te top of te !#linder )it a s'ita"le pl'%. 3pen te stop!o!/ and )it %entle aspiration raisete level of te manometer li&'id to tat of te i%est et!ed line in Fi%'re 1?d@J. Close testop!o!/ and o"serve tat te level of manometer li&'id remains !onstant. If it falls( rema/e te!ell8manometer +oint and !e!/ te stop!o!/. Bepeat te lea/a%e test 'ntil te improved sealin%prod'!es a stead# level of te li&'id. 3pen te stop!o!/ and "# %entle aspiration ad+'st te level of te li&'id( to tat of te i%est et!ed line. Close te stop!o!/. Bemove te pl'% from te top of te!#linder. ,e manometer li&'id )ill "e%in to flo). Start te timer as te li&'id rea!es te se!ondet!ed line 9 in Fi%'re 1?d@J and stop it )en te li&'id rea!es te tird et!ed line 10 in Fi%'re

1?d@J. Be!ord te time( t( to te nearest 0(2 s and te temperat're to te nearest 1 °C.

Bepeat te pro!ed're on te same "ed and re!ord te additional val'es of time and temperat're.Prepare a fres "ed of te same !ement )it a se!ond sample follo)in% te pro!ed're of .4. or()ere tere is little !ement availa"le( "# "rea/in% 'p te first "ed and reformin% it as in .4.. Carr#o't te permea"ilit# test t)i!e on te se!ond "ed( re!ordin% te val'es of time and temperat're as"efore.

4; Ca/iration o a))arats

4;1 Determination o the ed *o/me

3)in% to te need for !learan!e "et)een te !ell and te pl'n%er( te vol'me of te !ompa!ted!ement "ed varies for ea! !ellpl'n%er !om"ination. ,e vol'me of te !ompa!ted !ement "ed sall

"e esta"lised for a %iven !ellpl'n%er !learan!e. ,is vol'me is to "e determined as follo)s.

Appl# a ver# tin film of li%t mineral oil ?.7.7@ to te !ell interior. Pla!e te perforated dis! on teled%e in te !ell. Pla!e t)o ne) filter paper dis!s on te perforated dis! and ens're tat ea! !overste "ase of te !ell )ilst l#in% flat "# pressin% )it a rod.

Fill te !ell )it mer!'r# ?.7.1@. Bemove an# air "'""les )it a !lean dr# rod. Ens're tat te !ell isf'll "# pressin% a %lass plate on te mer!'r# s'rfa!e 'ntil it is fl's )it te !ell top. Empt# te !ell()ei% te mer!'r# to te nearest 0.01 %( m 2( and re!ord te temperat're. Bemove one filter paper dis!. Form a !ompa!ted !ement "ed "# te metod des!ri"ed in .4. and pla!e on it a ne) filter




paper dis!. Befill te !ell )it mer!'r#( removin% air "'""les and levellin% te top as "efore. Bemovete mer!'r#( )ei% it to te nearest 0.01 %( m7( and !e!/ te temperat're.

,e "ed vol'me " is %iven "#

)( 772 mc H mmV

ρ

−=

)ere

ρ $ is te densit# of mer!'r# at te test temperat're ta/en from ,a"le 1.

Bepeat te pro!ed're )it fres !ement "eds 'ntil t)o val'es of " are o"tained differin% "# less tan0.004 !m7. Be!ord te mean of tese t)o val'es as "%

-3,E Care so'ld "e ta/en to avoid spillin% or splasin% te mer!'r# and an# !onta!t "et)een it and teoperatorRs s/in and e#es.

4;2 Determination o the a))arats (onstant

From a s'ppl# of referen!e !ement of /no)n spe!ifi! s'rfa!e ?.7.2@ prepare a !ompa!ted !ement"ed and meas're its permea"ilit# "# te pro!ed'res %iven in .4.2( .4.7( .4.( and .6.2. Be!ord tetime( t( and te temperat're of test. sin% te same "ed repeat t)i!e te pro!ed're of .6.2 andre!ord te t)o f'rter val'es of time and of temperat're. Bepeat te )ole on t)o f'rter samples of te same referen!e !ement. For ea! of te tree samples !al!'late te means of te tree times andtemperat'res. For ea! sample !al!'late

o

ooo

t e

eS

K 7

101 η ρ .)( −=

)ere

&o is te spe!ifi! s'rfa!e of te referen!e !ement ?!m28%@G

ρ o is te densit# of te referen!e !ement ?%8!m7@G

t o is te mean of te tree meas'red times ?s@G

η o is te air vis!osit# of te mean of te tree temperat'res ?Pas@ ?,a"le 1@.

<it te spe!ified porosit# of e 0.400

o

o

oo t S K

η

ρ 10

6161.

.=

,a/e te mean of te tree val'es of as te !onstant as te !onstant / for te apparat's.

4;+ Re(a/iration

Bepeated 'se of te apparat's ma# !a'se !an%es in te !ement "ed vol'me and in te apparat's!onstant ?"e!a'se of te )ear of !ell( pl'n%er and perforated dis!@. ,ese !an%es !an "edetermined )it te elp of so!alled se!ondar# referen!e !ement )ose spe!ifi! s'rfa!e as "eenmeas'red.




,e !ement "ed vol'me and te apparat's !onstant sall "e re!ali"rated )it te referen!e !ement:

a@ after 1000 testsG

"@ in te !ase of 'sin%

anoter t#pe of manometer fl'idG

anoter t#pe of filter paperG

a ne) manometer t'"eG

!@ at s#stemati! deviations of te se!ondar# referen!e !ement.

48 S)e(ia/ (ements

Certain !ements avin% 'n's'al parti!le si$e distri"'tions and( in parti!'lar( fine !ements of i%er

stren%t %rades ma# prove diffi!'lt to form into a !ompa!ted "ed of porosit# e 0.400 "# te metodof .4.. So'ld t'm" press're on te pl'n%er !ap fail to "rin% it in !onta!t )it te top of te !ell or it( after ma/in% !onta!t and removin% te press're te pl'n%er moves 'p)ards( te porosit# of e 0.400 sall "e !onsidered 'nattaina"le.

For s'! !ases te porosit# re&'ired for a )ell!ompa!ted "ed sall "e determined e*perimentall#.,e mass of !ement( m( )ei%ed to ma/e te "ed as in .4. ten "e!omes

m ?1 e1@ρ1N?%@ Q?5@

)ere

e1 is te porosit# determined e*perimentall#.

4= Sim)/ii(ation o the (a/(/ations

4=1 asi( orm/a

,e spe!ifi! s'rfa!e &( of te !ement 'nder test is !al!'lated from te form'la

( )( )

)/(.

.......

......

g cmS t

t

e

e

e

eS

o

o

o

o

oo

2

7

7

10

10

1

1

×××

××

−

−

×=

η

η

ρ

ρ

Q?@

)ere

&o is te spe!ifi! s'rfa!e of te referen!e !ement ?!m28%@ ?.7.2@G

e is te porosit# of te "ed of !ement 'nder testG

eo is te porosit# of te "ed of referen!e !ement ?.5.2@G




t is te meas'red time for te !ement 'nder test ?s@G

t o is te mean of tree times meas'red on te referen!e !ement ?s@ ?.5.2@G

ρ is te densit# of te referen!e !ement 'nder test ?%8m7@?.4.7@G

ρ o is te densit# of te referen!e !ement ?%8!m7@ ?.5.2@G

η is te air vis!osit# at te test temperat're ta/en from ,a"le 1 ?Pa.s@G

η o is te air vis!osit# at te mean of te tree temperat'res ?,a"le 1@ for te referen!e

!ement ?Pas@.

4=2 Ee(t o s)e(iied )orosit7

se of te spe!ified porosit#( e ' 0.400( for "ot te referen!e and test !ements simplifies Form'la 9to

)/(.

. g cmS

t

t

n

nS

o

o

oo 2

10

10

×××=

ρ

ρ

In te !ase of !ements re&'irin% a porosit# oter tan e 0.400( Form'la 10 !annot "e 'sed 'nless areferen!e !ement as "een tested at tat porosit#.

4=+ Ee(t o (ontro//ed tem)eratre

As )ill "e seen in ,a"le 7( te val'e of η 10. ran%es from 0(00174 at 1 °C to 0.001747 at 22 °C.

nder te spe!ified la"orator# !onditions a val'e of 0.00179 !an "e ta/en to appl# )it an e*tremeerror of 0.4 and a more pro"a"le error of 0.7 or less. ,is f'rter simplifi!ation leads to tefollo)in% form'la

)/( g cmS t

t S

o

o

o 2

××=

ρ

ρ

4=4 Ee(t o densit7 o (ement

,e onl# remainin% possi"ilit# of simplifi!ation is te elimination of te densit# ? ρ @ terms. ,is as

previo'sl# "een done )ere te onl# !ements in &'estion )ere p're Portland !ements for )i! aval'e of ( of 7.14 )as ass'med to appl#. ,at ass'mption is /no)n to prod'!e errors of 'p to 1 .<it te in!reasin% 'se of !lass CE II( III and IN !ements ?see S 710@ m'! %reater errors are

!ertain. ,is standard re&'ires te densit# of !ement to "e determined and 'sed in te !al!'lation of spe!ifi! s'rfa!e.

410 E5)ression res/ts

<ere te porosit# is e 0.400( te fo'r times and temperat'res res'ltin% from te pro!ed're of .6.2

sall "e e*amined to !e!/ tat te temperat'res all fall )itin te spe!ified ran%e of 20 °C ± 2 °C. If

te# do( te mean of te fo'r times sall "e inserted in e&'ation 7 or e&'ation 10 and te res'ltin%val'e of S to te nearest 10 !m28%( sall "e reported as te spe!ifi! s'rfa!e of te !ement.

A differen!e of 1 "et)een te means of te fineness meas'rements !arried o't on t)o differentpo)der "eds from one and te same sample is a!!epta"le.




,e standard deviation of te repeata"ilit# is a"o't 40 !m 28% and of te reprod'!i"ilit# is a"o't 100!m28%.

<ere te porosit# is not e 0.400( e&'ation sall "e 'sed and te res'lt to te nearest 10 !m 28%reported as te spe!ifi! s'rfa!e of te !ement.

If( o)in% to a "rea/do)n in !ontrol or for oter reasons( te fo'r temperat'res do not lie )itin te

spe!ified ran%e of 20 °C ± 2 °C( a val'e of S sall "e !al!'lated for ea! !om"ination of time and

temperat're 'sin% E&'ation 2 or E&'ation . ,e mean of te fo'r val'es of S sall "e reported( tote nearest 10 !m28%( as te spe!ifi! s'rfa!e of te !ement.

Ta/e + > Densit7 o mer(r7 p? *is(osit7 o air and η 1.0 as n(tion o the tem)eratres

Tem)eratre °C Densit7 o mer(r7 ? ,%(m+ @is(osit7 o air .as η 10.

16

15

1

19

20

21

22

27

2

17.460

17.460

17.440

17.440

17.440

17.40

17.40

17.40

17.40

0.000 01 00

0.000 01 04

0.000 01 10

0.000 01 14

0.000 01 19

0.000 01 2

0.000 01 29

0.000 01 7

0.000 01 79

0.0017 2

0.0017

0.0017 4

0.0017 5

0.0017 9

0.0017 41

0.0017 47

0.0017. 4

0.0017 46

-3,E Intermediate val'es so'ld "e o"tained "# linear interpolation.




EAS 148-6: 2000


Documents

EAS 148-6 Determination of Fineness