Is 6461 8 1973
Is 6461 8 1973
Is 6461 8 1973
Whereas the Parliament of India has set out to provide a practical regime of right to
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in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
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education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
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BharthariNtiatakam
1516461(PartVIII).1973
Indian Standard
( Reaffirmed 2002 )
Rc8f&rmcd lgw)
CONCRETE
UJX
001.4:666.972:54.03/.04
0 Copyright 1973
BUREAU
MANAK
OF-INDIAN
BHAVAN,
BAHADUR
STANDARDS
SHAH
ZAFAR
MARG
March 1973
/
I
i
-- -
hdian
Standard
VIII
and
PROPERTIES
Concrete
Sectional
Chairman
TO
OF CONCRETE
Committee,
BDC
Representing
Dn H. C. VISVESVARAYA
l&nbsrs
Dn A. S. BHADURI
National Test House, Calcutta
SHRI E. K. RAMA~RANDRAN ( Alrernnte1
Snnr A. K. CI~ATTEI~JI
Cen tra1 Building
Research
Institute
( CSIR ),
Roorkee
Dn S. S. REHSI (Alternate)
Central Road Research Institute ( CSIR ), New Delhi
DIRECTOR
DR R. K. Grros~ ( AIlcrnatc )
Central Water & Power Commission, New Delhi
DIRECT~I~ ( CSMRS )
DEPUTY
DIRECTOR
( CSMRS ) ( Alternnte )
Alokudyog Services Ltd, New Delhi
StIRI K. G. GHOS~L
SHRI A. K. Btswas ( Alternate )
DR R. K. GHOSH
Indian Roads Congress, New Delhi
DR R. R. HATTIAN~ADI
Asso$ated Cement Companies Ltd, Bombay
SHRI P. J. JIOUS ( Alternate)
.JOINT DIRECTOR,
STANDAK~S
(R&S)
DEPUTY
Research,
Designs
Lucknow
&
Standards
Organization,
DIRECTOR,
I
STANDARDS ( B&S ) ( Altematc )
SARI S. B. JOSHI
S. B. Joshi & Co Ltd, Bombay
SRRI M. T. KANSE
Directorate General of Supples & Disposals
SHR~ S. I,. KATHUKIA
Roads Wing, Ministryjof Transport & Shipping
SHI~I S. R. KULKARNI
M. N. Dastur & Co ( Private ) Ltd, Calcutta
Concrete Association of India, Bombay
SHRI M. A. L&~LHTA
SHR~ 0. MUTHACHEN
Central Public Works Department
SUPERINTENDINQENQINEER,
END CIIICLA: ( Alternate )
SHRX ERACH A. NADIHSHAH
Institution of Engineers ( India ), Calcutta
In personal capacity ( Ronwnnlaya,
II First Crescent
SARI K. K. NAB~BIAR
Park Read; Gandhinagw, Adyar, Madras )
BRIG NARESH PRASAD
Engineer-in-Chiefs Branch, Army Headquarters
COL J. M. TOLANI ( Alkmata)
( Continued on page 2 )
This publication
reproduction
is protected
Act ( XIV
of 1957) and
of copyright
IS : 6461 (Part
VIII) - 1973
Members
RePresenfing
PROP G. S. RAMASWAMY
StructI%keygineering
Research
Cen$re
( CSIR ),
DR N. S. BHAL ( Alternate )
National Buildings Organization,
New Delhi
Da A. V. R. RAO
SHRI RAVINDRX LAL ( Alternate )
SRRI G. S. M. RAO
Geological Survey of India, Nagpur
Gammon India Ltd, Bombay
SHRI T. N. S. RAO
SHRI S. R. PINHEIRO ( Alternate )
Central Board of Irrigation & Power, New Delhi
SECRETARY
Irrigation & Power Research Institute, Amritsar
SARI R. P. SHARMA
SHRI MOHINDER SINQH ( Alternate )
Hindustan Housing Factory Ltd, New Delhi
SHRI G. B. SINoH
SHRI C. L. KASLIWAL ( Alternafe )
Beas Designs Organization,
Nangal Township
SHRI J. S. SINGHOTA
SRRI T. C. GAH~ ( Alternate)
India Cements Ltd. *Madras
_ SARI K. A. SUBRAMANIAX
SHRI P. S. RAMACRANDRAN (Alternate)
Dalmia Cement ( Bharar ) Ltd, New Delhi
SHRI L. SWAROOP
SHRI
A, V. RAMANA ( Alternate )
Director General, IS1 ( Ex-o#cio Member )
SERI 1). AJITHA SIMHA,
Director ( Civ Engg )
Secretary
SHRI Y. R. TANEJA
Deputy
Concrete
Director
Subcommittee,
BDC 2 : 2
Convener
SERI
S;
B. JOSRI
Members
SHRI
M. D. PATHAK ( Alternafe to
Shri S. B. Joshi )
Central Building Research Institute ( CSIR ), Roorkee
DR S. M. K. CHETTY
SHRI
C. A. TANEJA ( Alternate )
In personal capacity ( Shrikunj , Near Parkash Housing
SHRI B. K. CHOKSI
Socie~, Athwa Liner, Swat I )
& Standards
Organization,
DEPUTY
DIRECTOR, STANDARDS Research,
Designs
Lucknow
(B&S)
ASSISTANT
D I R E c T o R,
STANDARDS ( M/C ) ( Alternate )
Engineering Research Laboratories,
Hyderabad
;
DIEECTOR
i,
Central Water & Power Commission,
New Delhi
DIRE;;;;T(UC & MDD )
F
DIRECTOR
( C & MDD ) ( Altemafe )
( Continued on page 11)
Indian Standard
GLOSSARY OF TERMS RELATING TO
CEMENT CONCRETE
PART Vlll
PROPERTIES CONCRETE
O. FOREWORD
0.1 This Indian Standard (Part VIII ) was ado@d by the Indian
Standards Institution on 16 Februa
1973, afier, the draft halii
by
&@-Cement and Conclete Sectional z remittee had been approved by the
Cd Engineering Division Council.
1
f.
0.2 Cement concrete is one of the most versatile and extensively used
constmctions. There are a
building materials in all civil engin%rin
humber of technical terms connected with i%e basic materials for concrete
M well as the production and use of concrete which quite often reqadre
clarification to give precise meaning to the stipulations in the standard
cifications, codes of practices and other technical documents. It has,
r erefore, become necessary to standard=e the varioustersns and definitions
bsed in cement and concrete technology and thus avoid ambiguity in
heir interpretations. The Sectional Comsmttee has, therefore, decided to
bring out a series bf glossaries of terms relating to concrete and concrete
materials.
1. SCOPE
1.1 This standard (Part VIII)
properties of concrete.
covers
2. DEFINITIONS
2.0 For the purpose of this standard, the following definitions shall apply.
2.1 Absorption-The
process by which a liquid is drawn into and tends
to fill permeable pores in a porous solid body; also the increase in weight
of a porous solid body resulting from the penetration of a liquid into its
permeable pores.
2.2 Acceleration-Increase
in velocity or in rate of change, especially
the quickening of the natural progress of a process, such as hardening,
setting, or strength development of concrete.
2.3 Accidental Air-See
2.34.
cement.
4
.
e/ ._,,.,,
Ij,,,,
y
,.
2.13 Bleeding-The
autogenous Aow of mixing water within, or its
emergence from newly placed concrete or mortar; caused by the settlement of the solid materials within the mass or drainage of mixing water;
also called water gain.
2.14 Bleeding
Capacity-The
ratio of volume of water released
bleeding to the volume of paste or mortar.
by
2.17 Compacting
Factor-The
ratio obtained by dividing the observed
weight of concrete which fills a container of standard size and shape when
allowed to fall <nto it under standard conditions of test, by the weight of
compacted concrete compacted by a standard procedure of rodding (see
IS : 1199-1959* ) which fills the same container.
*Methods of sampling and analysis of concrete.
Is:8461 (Part
VIII)-1973
2.18 Compreaaive
Strength-The
measured maximum
resistance of a
area.
2.19 Concrete,
2.29 Concrete
mortar..
Fat -A
concrete
containing
a minimum
a
large
of voids.
proportion
of
2.21 Conaiatency
- The relative mobility or ability of freshly mixed concrete or mortar to flow, the usual measurements
are slump for concrete
and flow for mortar, cement paste, or grout.
2.22 Consistency
FactorA measure of out fluidity roughly analogous
to viscosity, which described the ease wit f which grout may be pumped
into pores or fissures; usually a laboratory measurement, in which consistency is reported in degrees of rotation of a torque viscosimeter in a specimen of grout.
2.23 Contraction
( or Expandon), of Concrete-The
sum of volume
changes occurring as the result of all processes affecting the bulk volume of
a mass of concrete ( szs also 3.66 ).
2.24 Creep-
Time-dependent
deformation
due to load.
Stren@h
Shrinkage-
See 2.18.
Contraction
2.26 Durability-The
ability of concrete to resist weathering
chemical attack, abrasion, and other conditions of service.
Strength of concrete or mortar
2.29 Early Strengthafter placement usually during the first 72 hours.
2.39 Effective
Modulus of Elasticity-Combination
plastic effects in an over-all stress-strain relationship
ture; often expressed as:
E err =
cube
1
1 + 0.4 (EC/El)
developed
action,
soon
.EC
where
EC = modulus of elasticity of concrete, and
@ = modulus of elasticity of the foundation
rock.
Air-
incorporat-
See2.23.
2.38 Fatigue Strength - The greatest stress which can be sustained for a
given number of stress cycles without failure.
2.39 Final Set -A degree of stiffening of a mixture of cement and water
greater than initial set, generally stated as an empirical value indicating
the time in hours and minutes required for a cement.paste to stiffen sufficiently to resist to an established degree, the penetration of a weighted
test needle; also applicable to concrete and mortar mixtures with use of
suitable test procedures (see also 2.46).
2.40 Final Set&g
Time -The
time required for a freshly mixed
cement paste, mortar, or concrete to achieve final set (see also 2.47).
2.41 Flash Set-The
rapid development of rigidity in a freshly mixed
portland cement paste, mortar, or concrete, usually with .the evolution of
considerable heat, which rigidily cannot be dispelled nor can the plastic
plasticity be regained by further mixing without addition of water; also
referred to as quick set or grab set.
2.42 Flat Slab - A concrete slab reinforced in two or more directions,
generally without beams or girders to transfer the loads to supporting
members.
2.43 Flow
a) Time dependent irrecoverable deformation (see 2.57); and
b) A measure of the consistency of freshly mixed concrete, mortar,
or cement paste in terms of the increase in diameter of a molded
truncated cone specimen after jigging a specified number of times.
7
See 2.41.
time required
for
to achieve initial set.
a freshly
mixed
Moisture
Movement
moves through
a porous
medium;
such
2.51 Permeability
to Water, Coefficient
of-The
rate of discharge of
water under laminar flow conditions
through a unit cross-secticnal
area
of a porous medium under a unit hydraulic gradient
and standard temperature conditions usually 20C.
2.52
Plaster
Set -
See 2.36.
2.53 Porosity-The
ratio, usually expressed as a percentage,
volume of voids in a material to the total volume of the material,
ing the voids.
2.54
Premature
Stiffening-See
2.55 Pressed
Edge-Edge
sure occurs under conditions
2.56
Quick
Set -
of the
includ-
2.36.
of a footing along
of over turning.
soil pres-
r
^
Ste 2.36.
8
Rich Concrete-
of high cement
2.61 Rodability-The
susceptibility
paction by means of a tamping rod.
~2.62 Rubber
Set -
content.
of fresh concrete
or mortar
to com-
See 2.41.
Setting
Time
decrease
caused
by drying and chemical
2.66 Shrinkage
- Volume
changes; a function of time but not of temperature
or of stress due to
external load ( see nlso 2.23 and 2.27 ).
2.67 Slump-A
measure
of consistency
of freshly
mixed concrete
mortar, or stucco equal to the subsidence measured to the nearest 6 mm of
the molded truncated cone immediately
after removal of the slump cone.
2.68 Specific
HeatThe amount
of heat required per unit mass to
cause a unit rise of temperature,
over a small range of temperature;
for
ordinary concrete and steel it is approximately
0% and 0.12 Btu/lb/&g
F
( cal/g/deg C ), respectively.
2.69 Splitting
Tensile
Strength
mined by a splitting tensile test.
2.70
Strength,
-Tensile
Compressive-See
strength
of concrete
deter-
2.18,
causes
Fatigue -See
2.30.
The property
2.80 Transverse
Strengthability to withstand bending.
of matter which
A property
resists fracture
by
2.81 Turbidimeter
Fineness -The
fineness of material, such as portland cement, usually expressed as total surface area in square centimeters
per gram, as determined with the turbidimeter (see also 2.84).
2.82 Void-Cement
cement.
Ratio -Volumetric
ratio of
air
plus
water
to
2.13.
10
Re@resenting
Saar V. K. GEANEKAR
StruttTkLeEngineering
Research Centre ( CSIR ),
0
SHRI A. S. PRASADA RAO ( Alternate )
SHRI K. C. GHOSAL
Alokudyog Services Ltd, New Delhi
SHRI A. K. BISWAS ( Al&ma&)
SHRI V. N. GUNAJI
Buildings & Communications
Department, Bombay
SHRI P. J. JAGUS
Associated Cement Companies Ltd, Bombay
SERI S. R. KULKABNI
M. N. Dastur & Co Private Limited, Calcutta
SHRI B. C. PATEL ( Alternate)
National Buildings Organization,
New Delhi
SERI G. C MATHUB
SHRI RAVINDER LAL ( Alternate )
Concrete Association of India, Bombay
SHBI M. A. MEHTA
SHXI C. L. N. IYENQAR ( Alternate )
Tar-Isteg Steel Corporation,
Calcutta
DB P., K. MOEANTY
Da R. S. PBAEAD ( Al&mate )
SHRI K. K. NAXBIAR
In personal capacity ( ( Ramanalaya, 11 First Cnsscent
DR M. L. PURI
Central Road,Research
Roads Wing, Ministry
11
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