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(Reaffirmed 2014)
IS : 7320 -1974
( Reaffirmed 1999)
(R eaffirmed 2008)
Indian Standard (Reaffirmed 2013)
(Reaffirmed 2018)
SPECIFICATION FOR
CONCRETE SLUMP TEST APPARATUS
(Reaffirmed 2012)
(Fourth Reprint NOVEMBER 2000)

(Reaffirmed 2011)

UDC 666.972 : 620.192.2.05

(Reaffirmed 2010)

(Reaffirmed 2009)

(Reaffirmed 2008)

(Reaffirmed 2007)

(Reaffirmed 2006)

© Copyright 1974 (Reaffirmed 2005)

BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Gr 2 August 1974
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IS I 7320 - 1974

Indian Standard
SPECIFICATION FOR
CONCRETE SLUMP TEST APPARATUS

Cement and Concrete Sectional Committee, BDC 2

Chairman Representing
DB H. C. VJ8VEBVARAYA Cement Research Institute of India, New Delhi

Mtmhns
DR. A. S. BHADURJ National Test House, Calcutta
SURI E. K. RAMACHANDRAN
( Atumau )
SunI A. K. CUATTERJI Central Building Research Institute (CSIR ),
Roorkee
DR S. S. REII8! ( Alternate )
D E PUT Y CnIEF ENOINEER Public Works Department, Government of Tamil
( BUILDINGS) Nadu
DEPUTY CIUEF ENOINEER
( IltRIGATION & DESIONS)
(Alternate)
DIREcTon Central Road Research Institute (CSIR), New Delhi
Dn R. K. GHOSH ( Alternate)
DIRECTOR ( CSMRS) Central Water & Power Commission, New Delhi
DEPUTY DIRECTOR ( CSMRS )
( Alternate )
SHIn K. II. GANGWAL lIyderabad Asbestos Cement Products Ltd.
Hvdcrabad
SURI K. C. GH08AL Alokudyog Services Ltd, New Delhi
Sum A. K. BISWAS ( Alt,rnale)
DR R. K. Gnosn Indian Roads Congress, New Delhi
BRIG HARISH CHANDRA Eng ineer-in-Chief ts Branch, Army Headquarters
SHRI G. R. MIRCRANUANI ( Alternate )
DR R. R. l-IATTIANGADI Associated Cement Companies Ltd, Bombay
SHRI P. J.
JAUUS ( Alttmtd, )
On IQBAL ALI Eng inecring Research Laboratories, Hyderabad
JOINT DIRECTOR STANDARDS Research, Designs & Standards Organization.
(B& S) Lucknow
DEPUTY DIRF;OTon STANDARDS
( B & S) i Altemate )
SHRI S. B. JOSHI S. B. Jo~hi & Co Ltd, Bombay
SURY M. T. KANSB Directorate General of Supplies & Disposals

( Continued 011 'tJl' 2)

(i) CoP),ighl 1974

IH lRI·:,t\ll ()J: INI)IAN STANI)AKI>S
T'his publication is protected under t hc Indian Copv7i.l!hi Act ( XIV of 1957 ) and
reproduction in whole or in pan by any means except with written pr-r m ission of the
publisher shall be deemed to be an infringement of (:oP\ ri~ht under t he said Act.
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'IS: 7320 - 1974

( Continued from page 1 )

Members R,p"s,nting
SHU,I s. L. KATHunlA Roads Wing, Ministry of Shipping & Transport
SHRI S. R. Kur.. KARNI ~1. N. Dastur & Co ( Private) Ltd, Calcutta
SUU.1 M. A. Ml':HTA Concrete Association of India, Bombay
SHUI O. MUTHACIlEN Central Public Works Department
SUPERINTENDINO ENGINEER,
2NO CIRCLl~ ( ALternt;:: )
SHUI ERACH A. ~ADIIt~HAlt Institution of Engineers ( India ), Calcutta
Snnr K. K. NAMnl:\lt In personal capacity (( Ramanalaya' 11 First Crescent
Park Road, Gandhinagar Adyar, Madras)
I

I}ROF G. S. RAMASWAMY Si ructura l Engineering Research Centre (CSIR) I

Rooi kee
Dn. N. S. nHAL ( Alternate J
[)RA. V. R. RAO Nat ional Build ings Organization, New Delhi
SHin K. S. SItINIVASAN ( Altemat« )
SHIH rL S. M. Rx o (;cological Sur\'('y of India, Nagpur
Sun: T. N. S. RAO {;atntnon India Ltd, Bombay
SUUJ S. R. PINHElnn i Alternate )
SEORF;TAHY Ci-nt ral Board of Irr iga t ion & Power, New Delhi
DEPUTY Sf:CItE'rAIlY (I) (Alie,1lutf )
SUR} R. P. SH.'\ItMA Irrigation & Power Research Institute, Amritsar
SUH.I MOHJNDEH. S,NGH ( Alternate)
SHUI (~. B. SINon Hindust an Housing Factory Ltd, New Delhi
SHIU C. L. Alternate )
KA8LI\VAL (
SHit' .1. S. SINOlfOTA Beas Designs Organization, Nangal Township
SHRI T. C. (]A RO ( Alternate)
SURY R. K. SINHA Indian Bureau of Mines, Nagpur
SHHI K. A. SUURA1\IANIAM India Cements Ltd, Madras
SHRI P. S. RAMACHANDRAN ( Alternate)
SHltI L. SWAHOOP Daltnia Cement ( Bharat ) Ltd, New Delhi
SURf A. V. RAMAN A ( Altfrnate)
SHRI I). AJITHA SIMllA, Director General, lSI ( Ex-oJlicio Member )
Dirr-cror ( Civ Engg )

Secretary
SURI Y. R.. TAN1:JA
r)cruty Director ( Civ Engg ), lSI

Instruments for Cement and Concrete Testing Subcommittee, BDC 2 : 10

Conuener
DR IQBAL AT..I Engineering Research I .abora t or ics, I Iydcraba d

Members
PROF B. M. AnUJA Indian Inst it ut« of Ter hnologv, New Delhi
LALA G. C.DAR National T~~t House, Cakulla
SHRt T. P. EKAMRARAM Highways Res-arch Station, Madras
DR R. K. GHOSH Central R.oad Research Inst iiute ( CSIR ), New n-n.:
SUR! K. L. Srerrn ( Alternate )
( Continued 011 page B )

2
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IS : 7320 - 1974

Indian Standard
SPECIFICATION FOR
CONCRETE SLUMP TEST APPARATUS

o. F 0 }{ E W 0 R D
0.1 This Indian Standard was a: loptcd by the Indian Standards
Institution on 21 February I 97 after the draft finalized by the Cement
L
} ,

and Concrete Sectional Committee had been approved by the Civil

Engineering Division Council.
0.2 The Indian Standards Institution has already published a series of
standards on methods of testing cement and concrete. It has been
recognized that reliable and inter comparable test results can be obtained
only with standard testing equipment capable of giving the desired level
of accuracy. The Sectional Committee has, therefore, decided to bring
out a series of specifications covering the requirements of equipment
used for testing cement and concrete, to encourage its development and
manufacture in the country.
0.3 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated,
expressing the result of a test or analysis, shall be rounded off in
accordance with IS: 2-1960*. The number of significant places r et aincd
in the rounded off value should be the same as that of the specified
value in this standard.

1. SCOPE
1.1 This standard covers the rcquircment s of the apparatus used for
determining the slump of fresh concrete as ~l measure of its consistency.

2. APP .&\RATUS
2.1 'Fhe apparatus shall consist of a mould for the test spccrrncn and a
tamping rod.
3. MOULD
3.1 Shape and Dimensions - The mould for the test specimen shall be
in the form of the frustum of a cone as shown in Fig. I or 2 and internal
dimensions as given in Table I.

·Rules for rounding off numerical values ( revised).

3
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III 7320 • 1.74

TABLE 1 INTERNAL DIMENSIONS OF MOULD

( Clawe 3.1 )

Sr. DJrrAILa DIMENSION TOLERANOE (SI' NO'I's)

No. mm mm
(I ) (2 ) (3) (4)
i) Bottom diameter 200 +3
- 1·5
ii) Top diameter 100 +3
- 1·5
W) Height 300 :I: 1·5

NOT. - Diameter and height measured anywhere on the mould shall not differ
(rom the Dominal dimension (that is 200. 100 and 300 mm) by more than the
lpecified tolerance.

3.1.1 Where no tolerance has been specified for a particular dimension,

it will mean that reference is being made to the nominal dimension.
'.2 Materlal- The mould shall be made of galvanized iron sheet or
any other suitable metal not readily attacked by cement paste; aluminium
.hall not be used. The metal shall be at least 1·6 mm thick.
'.3 Coa_ructlon - The mould may be constructed either with or
without a seam. When a seam is provided, the seam shall be essentially
as shown in Fig. 2.
3.3.1 The top and bottom of the mould shall be open and parallel to
'each other and at right angles to the axis of the cone. The internal
surface of the mould shall be smooth and shall be free from dents and
projections, such as protruding rivets.
3.3.2 The mould shall be provided with foot pieces and handles to
facilitate lifting it from the moulded concrete test specimen. The shape
and dimensions of the foot pieces and handles may be as shown in Fig. 1
and 2. Attachments shall be riveted, welded or brazed to the mould.
Any rivet used in the construction of the mould shall be countersunk on
the inside of the cone.
NOT. - A mould which clamps to a non-absorbent bale plate or an apparatus with
a luitable guide attachment (or measuring height of the moulded concrete may also be
accepted provided it otherwise conforms to the requirement. of the lpecification.

4. TAMPING ROD
f.l The tamping rod shall be a round straight steel rod, 16 mm
diameter and 600 mm long. The tamping end of rod shall be rounded
to a hemispherical tip, the diameter of which shall be 16 mm.

4
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IS I 7320 - 1974

1-6 mm MIN
THlCK

1.6 mm
THICK

All diMfOSioDi in miUimetres.

Flo. 1 MOULD ( SEAKLESI ) FOR SLUMP TEST OP CONCRETE

5
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IS I 7320· 1974

100+ 3
-1-5

1.6 mm
MIN THICK

300~ 1·5 1.6 mm

THICK

~'2
L·_-"'~--2...JOL.:~.l+J:.J+ l--IO-~--=p--...-..... 1.6
l----- -1.5
All dimension. in millimetres.

Flo. 2 A MOULD (WITH SEAM) FOR SLUMP TEST OF CONCRETE

6
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IS I 7320 • 197~
5. MARKING
5.1 The following information shan be clearly and indelibly marked on
the mould and the rod in a way that it does not interfere with the
performance of this apparatus:
a) Name of manufacturer or his registered trade-mark or both, and
b) Date of manufacture.

5.1.1 The apparatus may also be marked with the Standard Mark.
5.1.2 The use of the Standard Mark is governed by the provisions of Bureau of
Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The
details of conditions under which the licence for the Standard Mark ITIay be granted
to manufacturers or producers may be obtained from the Bureau of Indian Standards.

..,
I
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18 I 7320 • 1974

Mmtbns
Smn H. K. GUBA All India Instruments Manufacturen ac Dealers
Association, Bombay
SURI V. K. V A8UDEV AN ( AIII,an" )
SUBt P. J. JAoua Associated Cement Companies Ltd, Bombay
SUBl D. A. W ADIA (AlImuJII )
SUBI M. R. J08BI Ministry of Defence, R &. D
SUBI K. A. SIBASKAR (Altmaal,)
SaRI V. KANNAN Cement Research Institute of India, New Delhi
SURI M. V. RANGA RAO ( Altmuzl, )
hoI' C. K. RAKESH Indian Institute of Technolcgy, Bombay
DR R. S. AYYAR ( Alt"nat, )
SHBl P. V. SUBBA RAo Andhra Scientific Co Ltd, Maaulipatam
SUBI Y. S. NARAYANA ( Altmult, )
DB S. S. REBS1 Central Building Research Institute (CSIR), Roorkee
SURI J. P. KAU8BlsH ( AII,mal,)
SURI H. C. VERMA Associated Instrument Manufacturers (India) Pvt
Ltd, New Delhi
SBJ\I A. V. SHASTRI ( Alt,mill, )

8
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