C.S.A. and B.S. Specifications for Normal Portland Cement

(1)

Publisher’s version / Version de l'éditeur:

Technical Note (National Research Council of Canada. Division of Building Research), 1954-11-29

READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.

https://nrc-publications.canada.ca/eng/copyright

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la

première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n’arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.

Questions? Contact the NRC Publications Archive team at

PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information.

NRC Publications Archive

Archives des publications du CNRC

For the publisher’s version, please access the DOI link below./ Pour consulter la version de l’éditeur, utilisez le lien DOI ci-dessous.

https://doi.org/10.4224/20359206

Access and use of this website and the material on it are subject to the Terms and Conditions set forth at

C.S.A. and B.S. Specifications for Normal Portland Cement Swenson, E. G.

https://publications-cnrc.canada.ca/fra/droits

L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.

NRC Publications Record / Notice d'Archives des publications de CNRC:

https://nrc-publications.canada.ca/eng/view/object/?id=3edbfd32-51d3-4e06-a54e-b8a4f1cfcffc https://publications-cnrc.canada.ca/fra/voir/objet/?id=3edbfd32-51d3-4e06-a54e-b8a4f1cfcffc

(2)

NATIONAL RESEARCH COUNCIL OF CANADA

DIVISION OF BUILDING RESEARCH

'fE

C

1HIN ][ CAlL

NOT FOR PUBLI<a-TI<n\ Swenson

NOTE

E.V.G.

FOR INTERNAL USE

Deputy ｾｩｮｩｳｴ･ｲＬ Dept. of Public Works DATE C.S.A. and B.S. Specifications for Normal ｐｯｾｴｬ｡ｮ､

Cement. PREPARED BY PREPARED FOR CHECKED BY APPRovMmar

29, 19$4.

R.F.L.

SUBJECT

. The Canadian Standards Association specification for normal (ordinary) portland cement differs from that of the British Standard specification in certain physical and chemical requirements. These differences are of minor significance except in the case of soundness where the methods of testing are radically different and criteria for

soundness are essentially unrelated. Some British cements fail the C.S.A. autoclave test for soundness.

The chemical and physical requirements of C.S.A. and B.S. are shown in Tables I and II.

TABLE I

C.S.A. AND B.S. CHEMICAL REQUIRENENTS FOR PORTUND CEMENT

ｾＮ

i _C.S.A. _B.S. _ｾｾ

,

Loss on Ignition _3% _{3% (temperature climate)}

(max. ) _{4% (hot climate)}

Insoluble Residue

(max. ) _0.7% 1.0%

pulphur Trioxide (max. ) 2.75%

C3A ｾ 9.0% 3.0%

C3A

<

9.0% 2.5%

ｾ｡ｧｮ･ｳｩ｡ (max.) _5% _4%

-ｾＮ B.S. requires that the percent lime, after deduction of the.t

necessary to combine with the ｳｵｬｰｨｾｲｩ｣ anhydride presont, to silica alumina and iron oxide when calculated (in percentages) by ｾｨ･

formula:

(3)

·1'""'" :'

.o.fJ ...ｾ t..

...

(4)

2

shall not be greater than 1.02 nor less than 0.66. The ratio of the percentage alumina to that of iron oxide shall not be less than 0066.

The chemical requ:i"rements are very similar for C.S.A. and B.S., the small differences being of minor importance. The B.S. limits on the ratio of lime to ｳｩｊＮｩ｣｡ｾ alumina and .ferric oyide places an additional restriction on cem8nt cOlliposition.

TABLE II

r - - - . ＧＮＭＮＭＭＭＭＭＭＭＭＭＭＭｾＭ .. .

-ｃｾｓＮａＮ and B.S. PHYSICAL REQUIREMENTS FOR FORTLAND CEMENT

B.S.

10%

?_c..".ro") sqoem

I'

g::-.

18%

:Max. L"esidue retained

I-No. 200 sieV8 (CaSB)

- if00 170 si6 Ve (BS )

Mir..

specific surface

1-- ＭＮＭｾＮｾ _ _4 - - d ＭﾷｾｉＭＭﾷＭＭﾷＭＭﾷＬＭﾷｾＢＭＧＭｲＭＭＧ C,S"A.

"---i---.---.---J----.-,,-.---I

i

! I IFineness

Soundness ｊｾ ..J"'.. Max.. expansion _by'

i

H "

-autoclave

1.0/S

I

i;

I-boiling test i 0040 J.D.

I

i-aerating test j 0020 in.

/Time

I i

of Set

I

Vicat ini U.al, min. 1-!-5 min" , 30 mino I

.

-

finaly max • 8 hrs. ! 10 hrso

I

Gillmore

C O l - " .,

miD" 60 rain,.

I lDl'IJ1,ct.Lj

I

_{:'rensils Strength} _Age

_-

ｾＬ

-

final ma:x. 8 hrs. :

_I

days 200 psi 300 psi

.) I _{(min" )}

₇

days

27S

Ii

I

375 II t

I

28 days

JSJ

11 I I , I i C . I ompre;3sJ..vC I_,

IStrength Ｈｭｩｮｾ ) Age

-

3 days 900 psi

I

1600 psi

7

days 1600 II ₂₅₀₀ II

28

days 3000

_{" I}

i

The B.S. specif5.ca tion hac a higher fineness requirement. The 30mewhat more finely ground British cements yield higher early strengths and this is reflected in the higher mininla for compressive and fJ$x.u.ral strengths"

The C.S.A. and B.S. soundness tests are radiGc:\lly differ'ent. The C.S.A. autoclave te3t is considered nw.C.tl more

severe, and the expansion limit of 1% much more restrictive, than the

BoS.

boiling test and its expansion Jimits,

The following table 81101".0 the results of some. C.S ,A.

physical tests on one Canadian, SJX British and one German cement,

(5)

j

TABLE III

C.S.A. PHYSICAL TESTS ON BRITISH Am OTHER NOR_"!.A.L PORrrLAND CEMENTS

Source "

can'oJ Bro-:-] Br ..

ｬｾｲＭｾｔ

.B;:-]"&

Bro,

Germ.._

I Fineness

1-%

retained ; 200 mesh I

ｌｾｾｾｾｾｾＺｾＺ

..._.-

ｏｾＰＹ

LOI

I

L04

I

ＱｯｾＳ

Ｑｾ［ＵＱＧＭＭｾＧｾＴ

ＭﾷｬＮｾＱＰ

0.17

I

%

expansion

I

I ·

I

ｾ

ｾｾＺｾｳ｟ｴ｟｟｟｟

__

1.03 I

1,2?-+_.1.07

lo5jl___

I

1:20

I

Setting time

I

vicat

I :

Initial set (hr - min) 2-30 ＲﾷﾷＧＬｾＰＱｾＵＵ 2-15 2·-·

30

2··00 ＲｾＬＱＵ 2 ...30 I Ifinal set .

I

ｩＭｾｨＮｾ｟ＮＢ

._m_in_"

ｾ｟｟

4-

1

15 i

ｾＧＮ＼［ｏ

I

4-05 " 3-10 , 3·-.5,

3.'++

3-50

2··40

ｉｇｾｾ［ｾｾｾ［ｾｖＸ

-I-_---,---i-

--+--,--

·-1 ._-.,

I

-1

I

'

p , S"J. " ) I , I

'" 3

days 1500

I

1680 204(J

ＬｾＱＰＰ

::i.970 r 2630

I

2040 :,830

I

I _. 7 days 2430 2520 2600 2990, 2530! 3050

I

2810: 3200 \ : l..-.-._. .•. . _. _ . __ " . ｾＮ｟Ｎ

Only ona of the six British cements passes the C.S.A.