IS 10262

1. 18 10262 « 1982
(Reatfirmed 2004 )

Indian Standard

RECOMMENDED GUIDELINES FOR
CONCRETE MIX DESIGN

Fifth Reprint MARCH 1998

UDC 666.972.1.031.1

© Copyright 1983

BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAIADUR SHAH ZAPAR MARG
NEW DELHI 110002

February 1983

2. 18 ı 10262 = 1982
(Reafiemed 1999)

Indian Standard

RECOMMENDED GUIDELINES FOR
CONCRETE MIX DESIGN

Cement and Concrete Sectional Committee, BDC 2

Chaimen Rprnting
Da H, ©, Vievesvanara Cement Revearch Intute of India, New Dei
Member
AanniopaDuasoron,Sranmanoe Reach, Designs de
was) ‘(Biiistey of Railway

Dxrork Dinzoren, Staxpanpe
(B& 8) Caliente)
Sunt K.P, Bunsen Lasion & Toubro Lid, Bombay
‘Suan Haman N, Manas (Altena

}
aliens Test House Cale

sunt $k, Baymmanz

Same RON Ba Beas Degas Organznon, Mangel Town

DAÑOS. vas Structural Eogitering Resarch Coote (SR);
For

nu Exctuztn (Dyson) | Cantal Public Works Department, New Delhi
(Beaver) Tut Catoate}

Gus Extimene (Paomere) rrittin Department, Government of Punab,
handigerh

Dunzoron, PRI (Altmat

Dinzeron (CSMRS) (Central Water Coraminion, New Delhi
‘Darory Dinnoron (CSMRS }

Clint)

Sum PACE Da ‘The Concrete Amociation of India, Bombay
‘Sunt. Dogan ( Alumste)

Sunt VK: Goran Pp ‘Chief's Branch, Army Headquarters,
Sunt 5. N: Panos (dlirate)

Sunt A. Xe Gorse Hyderabad Aseos Cement Perdus Lid,

Da Tapas ats Bagiarerng Reseach Labora

Siu ‘Tht Amocisted Coment Companies

Suns 8 MN, Dur & Go Prt Lid, Caleut

ation of Engineer (Tod

‘Smal 8. 7. Unwansa (mt)

(Continued en page 2)

© ms
BUREAU OF INDIAN STANDARDS

‘This publication e protected under the Indian Copyright et ( XIV of 1057 ) and

reproduction In whole or im part by aay means except with wetten perminion of the

Pobildbur shall be deemed fo be an inflngement of copyright under the sald Act.

3. 18110262 - 1982

(Contin fr paa 1)

Mentos Representing

Da Mona Rat Central Building Research Institute (CHR),
Roorkee
Da 5.5, Rena (Altea)
‘Sant KK Nain ln personal capacity ('Remenal 11 Fit Great
"bok nad Gandhinagar, bar, Mates)

Sant HS, Parmiona Hindustan Prefab Lad, New Delt
Shou 63, Minna Ateratey

ant ER. Pata Sndian Roads Congres, New Dei

Sam Y Pana Canal Road estare Ima. € CSIR, New

Bai
Sunt M. R. Onatrensne (Allanate 1)
Suns À Le Sens (Aloma tt)

Da Me Ramat Structural Engineering Research Centre (CSIR)
Minds

Suet A. Y. Rasa Dalia Comment (barat) Lad, New Del

Sant G: Risa Directorate Gentral of Supplie and Disposals,
‘New Delt

Da A.V. Rao, National Buildings Organization, New Di

Sint Je Ses Goren ( Alert)
Smnch. Y: Ouatararas Rao” Geological Survey of India, Calcutta

‘Sunes. Row (loma)

gure TEN. Sao Garen India Ltd, Bombay
Sant Anson Ramat Came Corporation of Inda Ld, Now Delhi
‘Sunt, Vir Rao | lato)
Scan (Central Board of Irrigation and Power, New
Dai
Derry Sseneranv (I) ( Altet)
SU rave Ronde ing, Ministry of Shipping and Transport,
ew Dels

Suns R.L. Karoon (Alerts)
Sunt KR: A Sonar “The India Cements Lad, Madras
‘Sani PS. Raseomanpnan ( Anat)
Supenineswpise Bromen Fublle Works Depa
(Demers) "Tall Nadu, Madras
Baeevaive Enouaen (SM & R
Division) { dltonets)
Sunt L. Swanooe’ Orina Cement Lid, New Delhi
Sunt G. Rama, Director General, IST ( Eafeio Member)
‘Direcer (Civ Bogs)

ent, Government of

See

Sant M. N. Neptaxanonax
Asıntant Director (Gv Bagg 151

(Cond en page 21)

4. 181 10262 - 1982

Indian Standard

RECOMMENDED GUIDELINES FOR
CONCRETE MIX DESIGN

0, FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution
on 30 July 1982, afier the draft finalized by the Cement and Concrete
Sectional Committee had been approved by the Civil Engineering Division
Council

0.2 Considerable need has been felt for forroulating standard recommend
ations for guidelines on proportioning of concrete mixes, The need has
been further emphasized by the importance given to design mix concrete
according to IS: 456-1978". Having recognized this need, Cement and
Concrete Sectional Committee decided to evolve a standard recommended
guidelines for concrete mix design.

0 The proportioning of concrete mixes consists of determination of the
‘quantities of respective ingredients necessary to produce concrete having
Adequate, but not excessive, workability and strength for the particular
loading and durability for the exposure to which it will be subjected.
Emphasis is laid on making the most economical use of available materials
50.35 to produce concrete of the required attributes at the minimum cost.

0.4 Concrete has to be of satisfactory quality in both the fresh and hardened
states. The task of proportioning concrete mixes is accomplished by the
use of certain established relationships which afford reasonably accurate
guidance for selecting the best combination of ingredients so as to achieve
the desirable properties of the fresh and hardened concrete, Out ofall the
physical characteristics of concrete, compressive strength is often taken as
an index ofits quality in terms of durability, impermeability and water-
tightness and is easily measurable, Therefore, the mix design is generally
carried out for a particular compressive strength of concrete, coupled with
‘adequate workability, so that the fresh concrete can be properly placed
and compacted, In addition, the mix proportions are also checked against
the requirements of adequate durability for the type of exposure condition
anticipated in service,

"Code of pracica for plain and reinforced concreto (rd rin).

3

5. 18 110262 «1982

0.5 The basic assumption made in mix design is that the compressive
Strength of workable concrete fs, by and large, governed by the water-
Cement ratio, Another most convenient relationship applicable to normal
concrctes is that fora given type, shape, size and grading of aggrepates,
the amount of water etermincs it workability.” However, there are
Various other factors which affect the properties of concrete, for example,
the quality and quantity of cement, water and aggregates; batching, trans
portation; placing; compaction; cuting; ete. Therefore, the specific relation.
Thips that are used in proportioning concrete mixes should be considered
Only as a basis for trial, subject to modifications in the Tight of experience
e well as for the particular materials used at the site in each case

0.6 This standard does not debar the adoption of any other accepted
methods of mix design

0.7 For the purpose of deciding whether a particular requirement of this
standard is complied with, the Anal value, observed or calculated, expres-
sing the result of a test or analysis, shall be rounded off in accordance
with IS: 2.1960. The number of significant places retained in the rounded
off value should be the same as that of the specified value in this standard.

1. SCOPE

1.1 This standard lays down the recommended procedure for designing
concrete mises for general types of construction using the. concreing
materials normally available. “The design à carried ost for a desire
Compresive strength and workabilty of concrete using continuously graded
Sesteguies: TRI sandard docs not include the design of concrete mines
iBeficuea strength or when gap-geaded aggregates or various admixtures
and pozrolana are to be used;
1.2 All requirements of IS: 456-1978} and 15: 1343-1980, in so far as
they apply, shall be deemed to form part of this standard’ except where
otherwise laid down in this standard.
2. DATA FOR MIX DESIGN
2.1 The following base data are required to be specified for design of a
Concrete mix
3) Characteristic compresive strength (that is, below which only a
apecided proportion of tent results are allowed to fall) of concrete
228 days Ua),
b) Degree of workability desired,
Tops for rounding af numeral values ri).

Cod of practice for plain and reinforced concreta
roe (fo ra

4

6. 9) Eimicions on the water cent rat
coment to ensure adequate Gurabilty (sue Appendix À of
18: 456-1978* ), 5 a iene

4) Type and maximum size of aggregate to be used, and

©) Standard deviation (+) of compressive strength of concrete,

Noon Standard dein of opera ofeach grade hal be determined par

S436 grat. When rene of can ser of teat (at

In 36) ee Sa avala hen: depending Ypon the re of quay zent

expected to be ‘it, the value of andar vn aed
‘By be adopeed for guidance,

TABLE 1 SUGGESTED VALUES OF STANDARD DEVIATION

Grave or Sranpinp Dave ron Dırnannus Daonanz oF
Coronet "Conroe Nin 2
Ver Cova “Good

o a a

mio 20 29

ms 25 35

mao ys 46

M25 “3 $3

650 so 60

Mas ss 63

M40 56 56

Mas so 70

M0 54 74

ms 67 17

MG sa 18 ss

Nora-— Appendix A provides guidance regarding the diferent degrees of quality
sonal Bath depending upon te latas nad paces adopted al

2.2 Target Strength for Miz Design — In order that not more than the
specified proportion of test results are likely to fall below the charactesistic
strength, the concrete mix has to be designed for a somewhat higher target
Average compressive strength (far). The margin over the characteristic
Strength depends upon the quality control (expressed by the standard

e

in und reinforend concrete (lr me).

5

7. 18 + 10262 - 1982

deviation ) and the accepted proportion of results of strength tests below
the characteristic strength (fer), given by the relation:

Jamfatıxs

where
Fox = target average compressive strength at 28 days,
fox = characteristic compressive strength at 28 days,
1 — standard deviation, and

1 ma mate, depending upon the accepted proportion of low
Fest and the number of test for large number of tn,
the value offi given in Table 2,
ern Acodig to 18 456197 and IS: 19491201, the caracte
eng ar asa tats below gach q ute an ct (Y ENT
Tat spa to fl. "ad che cove equation wil eae:

Tamfartssı

TABLE VALUES OF +

0
128
130
15
186
2

3. SELECTION OF MIX PROPORTIONS

3.1 Selection of Water Cement Ratlo — Since different cements and
aggregates of different maximum size, grading, surface texture, shape and
other characteristics may produce «neretes of different compressive
strength for the same free water-cement ratio, the relationship between
strength and free water-ccment ratio should preferably be established for
the materials actually to be used. In the absence of such data, the prelimi
nary free water-cement ratio (by mass) corresponding to the target
strength at 28 days may be selected from the relationships shown in Fig. 1

“Gade of practice for plain and reinforced concreto (hid ron).
God of practice for presuened concreto (Barta D

6

8. 18 10262 1982

4

à

/

28-DAY COMPRESSIVE STRENGIN OF CONCRETE, N/mm?

E E 06 54
WATER-CEMENT RATIO

Eso, 1 Gewaratiseo Reavion Berwaew Faze Waren-Ceusnr
Rario AND CowPREssIVE Sraexota or CONCRETE

3.1.1 Alternately, the preliminary free water-cement ratio (by mass)

corresponding to the target average strength may be selected from the

relationships shown in Fig, 2 using the curve corresponding to the 28 days
cement strength to be used for the purpose,

Nore — The method decribed in Appendiz B involving determination of com

proie eng of concrete cubos cured by accelerated method, may De ed for

3.1.2 The free water-cement ratio selected according to 3.1 of 3.1.1
should be checked against the limiting water-cement ratio for the require-
ments of durability, and the lower of the two values adopted.

1

9. 181 10202. 1982

8-DAY CONCRETE SIRENGIM N/mm?

00]

Er)
200] = III
II
| II

A
E E TI ET ENT

WATER-CEMENT RATIO

46-027 Brief Comet, Ted dard o ES: 4031-1968
Am 319.968 Nimes (325-375 get )
B = 268417 Nene (15-425 kfc)
LC 47468 Nan (425-475 ge)
8246651 5 Nm (423.525 kelem)
Em 515564 Nimes (505-575 gjomt)
Fm 354613 Nam (375.625 tyler}

Fio.2 Raaciox Serwarn Fare Waren-Cosr Raro Ann
Conowere Sawanern nor Dirvaxeyr Cure Sensneras

10. 181 10262 - 1982

3.2 Æstimation of Air Content — Approximate amount of entrapped air
to be expected in normal ( non-air-entrained ) concrete is given in Table 3.

TABLES APPROXIMATE AIR CONTENT

Nowmwar Maxısen Sue Esruarero Atm, at Pencexraos
‘or Acornoare ‘or Vor Or Coyonzee
10 30
2 20
nm ro

3.3 Selection of Water Content and Fine to Total Aggregate Rs

3.3.1 For the desired workability, the quantity of mixing water per uni
volume of concrete and the ratio of fine aggregate to total aggregate by
absolute volume are to be estimated from Tables 4 or 5 as applicable,
depending upon the nominal maximum size and type of aggregates.

"TABLE 4 APPROXIMATE SAND AND WATER CONTENTS PER CUBIC
‘METRE OF CONCRETE FOR GRADES UPTO M35

Nowvas Maxima Waren Comrie’ eme Sax as Pannen or
Sie or Aooetoura Couto Merun or Coxeners ‘Tors, Aven uate BY
mm de Amor Voice
10 200 0
E 196 5
” 105 »

Water content corresponding to saturated surface dry aggregate

TABLES APPROXIMATE SAND AND WATER CONTENTS PER CUBIC.
METRE OF CONCRETE FOR GRADES ABOVE M35,

(Clases 33, 8.3.8,3.84 and Table)

ona Maaco Waren Cowrmwnt.ven Saum as Pancner or
Siam Anuntoare — Como Merar or Coveneer Tovar Aconsosrr ar
sa kr Anson Vora
10 200 ES
2 100 25

‘Water content corresponding to saturated suríaco dry aguregate

11. IS: 10262 - 1982

3.3.2 ‘Table 4 is to be used for coneretes grade up to M 35 and is hu

on the following conditions

+) Crushed (angular) coarse aggregate, confor sus
1970,

b) Fine aggregate consisting of natural sand conforming to grading
zone 11 of Fable 4 of 3S: 303.1970%,

Water-cement ratio of 06 (by mass}, and

Workability corresponding to compacting factor af 010,

g to IS

3.3.3 Table 5 is to be used for concretes of grades above M 35 and is
based on the following conditions:
a) Crushed (angular) coarse aggregate conforming to IS: 383-
1970",
b) Fine aggregate consisting of natural sand conforming to grading
zone 11 of Table 4 of 15+ 383-1070,
©) Water-cement ratio of 0 35 { by mass), and
4) Workability corresponding to compacting factor of 080,

3:34 For other conditions of workability, water-cement ratio, grading
of fine aggregate, and for rounded aggregates, certain adjustments in the
quantity of mixing water and fine to total aggtegate ratio given in Tables 4
and 3 are to be made, according to Table 6,

Nose — Aggregate should be used in saturar
otherwise, wht computing te requicrment of mixing water, Avance sh
made forth feo (surlace } moiture contributed by the Rae aad course agregas.
Tine amount of mising water obtained Pom Tables und 8 shal be reduced Dr an
ammount equal tothe free mascar contacted by the cour and foe aggregates
ithe other handy af the aptos are dry, the amount of miss water scout be
Inccessal by an amount equal tothe mouture ely to be abc by the ager

tutes The arface water dod percent watrenbuorpllon of aggregates shall bn deter:
‘ined according to 1902388 Patt HIS

34 Calculation of Cement Content — The cement content per unit
volume of concrete may be calculated from the frre water-cement ratio
[ee 3-1 and 3.1.1 ) and the quantity of water per unit volume of concrete
(me 331).

‘The cement content so calculated shall be checked against the
minimum cement content for the requirements of durability and the
greater of the two values adopted

Sate and fine aggregates from natural sources for concrete { seend
rain

“Methods of tet for aggeegaes for coneree: Part Il Speci gravity, density, void,
sbetrption and bulk,

10

12. 18 + 10262 - 1982

TABLES, ADJUSTMENT OF VALUES IN WATER CONTENT AND
SAND PERCENTAGE FOR OTHER CONDITIONS
(Cla 3.34 3084.1)

Cnaxor tx Cosmo Srıpunanz
ow Tanne à ao à

0
For sand conforming to grading
one, Zone AN ge Zone IV of
‘Babe or ES 588-1970"
Increase or decreae in the value of
‘compacting factor by 01

Each 005 inerease or decrease in 0 4 1 percent
Thee watercement rao,

For rounded aggregate = 1S kgjm? 7 percent
«Specification for coarse and fine aggregates from natural source for eonerce (sand

meiner).

3.5 Calculation of Aggregate Content

3.5.1 With t
crete and the ratio of fine to total aggregate already determined, the t
aggregate content per unit volume of concrete may be caleulated from U
following equations

quantities of water and cement per unit volume of con-

val Sieh LJ plazo a
re[r+£+ 5 ii Tes

where
¥ absolute volume of fresh concrete, which is equal to gross
volume ( m?) minus the volume of entrapped air,
W ox mass of water (kg ) per mó of concrete,
G = mass of cement (Lg ) per m? of conerete,
So = specific gravity of cement,
P = ratio of fine aggregate to total aggregate by absolute

fu ta = total masses of fine aggregate and coarse aggregate (kg)
per m of concrete respectively, and

Sim Son = specific gravitica of saturated surface dry fine aggregate and
‘coarse aggregate respectively.

u

13. 18 10262 - 1982

3.6 Combination of Different Coarse Aggregate Fractions

arse aggregate used should conform to IS! 383-1970*. Coarse aggre-
{gates of different sizes should be combined in suitable proportions 0 as to
Tesalt in an overall geading conforming to Table 2 of 19: 383-1970" for
the particular nominal maximum size of aggregate.

3.7 Calculation of Batch Masses — The masses of the various ingredients
for concrete of a particular batch size may be calculated.

3:8 An illustrative example of concrete mix design is given in Appendix C.
4. TRIAL MIXES

4.1 The calculated mix proportions shall be checked by means of trial
batches, Quantities of materials worked out in accordance with 3.1 to 3.7
shall comprise Trial Mix No. 1. The quantity of materials for each trial
shall be sufficient for at least three 150 mm size cube concrete specimens
and concrete required to carry out workability test according to 18: 1199+
19594.

Workability of the Trial Mix No. 1 shall be measured. The mix shalt
be carefully observed for freedom from segregation and bleeding and its
finishing properties, IF the measured workability of Trial Mix No. 1 is
different from the stipulated value, the water content shall be adjusted
according to Table 6 corresponding to the required change in compacting
factor, With this adjusted water content, the mix proportions shall be
recalculated keeping the free water-cement ratio at the pre-selected value
which will comprise Trial Mix No. 2. In addition, two more Trial Mixes
No, 3 and 4 shall be made with the water content same as Trial Mix No. 2
and varying the free water cement ratio by ++ 10 percent of the pre-selected
Value, For these two additional Trial Mixes No, 3 and 4, the mix propor-
tions are to be recalculated for the altered condition of free warer-cement
ratio with suitable adjustments in accordance with Table 6,

‘The procedure for trial mixes is explained by an illustrative example
in Appendix D, where the starting mix is arrived at according to 3. Mix
No. % to 4 normally provides sufficient information, including the relation
ship between compressive strength and water-cement ratio, from which
the mix proportions for field trials may be arrived at. Using the relation“
ship so obtained between the compressive strength and water-cement rat
any change needed in the water-cement ratio to get the required target
compressive strength may be easily obtained. The concrete mix proportions
shall, however, be recalculated for this changed water-cement ratio, taking

“Specification Tor eoarı and Se
(end nin
“fMlethods of sampling and analyse of concrete,

regates from natural sources for concrete

2

14. 18 + 10262 - 1982

the water content same as that determined in Trial Mix No. 2. If the
size and special requirement of the work so warrant, the trial may he
extended to cover larger ranges of mix proportions as well as other vari-
ables, such as alternative sources of aggregates, maximum sizes and grading
of aggregates, and different types and brands of cements.

APPENDIX A
( Note Below Table 1 )

DEGREE OF QUALITY CONTROL EXPECTED UNDER
DIFFERENT SITE CONDITIONS

Degree of Control Conditions of Production

Very good Fresh cement from single source and regular tests, weig)
batching of all materials, aggregates supplied in single
sizes, control of aggregate grading and moisture content,
control of water added, frequent supervision, regular
orig and strength es, and Gell Tsboratory
facilities.

Good Carefully stored cement and periodic tests, weigh-
batching of all materials, controlled water, graded
aggregate supplied, occasional grading and moisture tests,
periodic check of workability and strength, intermittent
Supervision, and experienced workers,

Fair Proper storage of cement, volume batching of all aggre-

gates allowing for bulking of sand, weigh-batching of
Cement, water content controlled by inspection of mix,
‘and occasional supervision and tests,

15. 18: 10262. 1982

APPENDIX B
( Clause 3.1.1)

METHOD OF RAPID ESTIMATION OF WATER-
CEMENT RATIO

B-1. Use of Fig, 2 will necessitate testing of the cement for its 28 day com-
pressive strength according to 15: 403Í-1968* and another 28 days are
Reeded to obtain the compresive strength of concrete according to the
trial mixes. As an alternative, a rapid method of concrete mix design
Which will take only 3 days for trials is described in B-2. The procedure
is based on the use of accelerated curing ( boiling water ) method for deter-
‘ination of compressive strength of concrete according to IS : 9013-1978.

52. PROCEDURE

B-2,1 Determine the accelerated strength (boiling water method ) of a
‘reference’ concrete mix having water-cement ratio = 095 and work»
ability ( compacting factor ) == 0°60 with the cement proposed to be used,
‘on 190 mm cube spécimens. The nominal maximum size of aggregate of
the “reference” concrete shall be 10 mm and fine aggregate used shall com
form to Zone If of Table 4 of IS : 988-1970}

B-2.2 Corresponding to this accelerated strength, determine the water.
cement ratio for the required target strength of the concrete mix from
Fig.3.

B-2.3 Work out the remaining mix proportions according to 9.2 to$.7 and
check che workability of the trial mix,

B24 Determine the accelerated compressive strength of the trial mix
(boiling water method ) and estimate the 28 day compressive strength
‘with the help of correlations between accelerated and 28 day strengths of
concrete, of the type of Fig. 2 of 18: 9013-19785,

Fiat paint cta for ie cement
FERS o ny, arog determining comprenive arena of crie
Speciation fr conte and Ans ag
nas

from natural

16. DAY COMPRESSIVE STRENGIH OF CONCRETE, N/mm?

18: 10262 - 1982

m

soo

EN

> aloo

200 ~ —+

W

109)

e TS
WATER-CEMENT RAMO
ee Sth Teed atin 115 97) Rae Mi

D 2211240 Nimes (215 245 kgjema )
ETAT Nimes (26-03 leat)
F = 270-299 Nimmt ( 275-908 kglemt
Fio. 3 Retavion Between Free Waran-Ceuent RATIO AND
‘Coupressive StreNoTH or Concrete FOR Dirrexent Cemenr
Srapxorus Deregumeo on Reverence Concrete Moxes
(Accrumrareo Tası-Boiıno Water Mutizop )

15

17. 18 : 10262 - 1982

APPENDIX C
{Clause 3.8 )

ILLUSTRATIVE EXAMPLE ON CONCRETE MIX DESIGN

An exam
is given below

ple ilustrating the mix design for a concrete of M 20 grade

C:1. DESIGN STIPULATIONS

a) Charscternticcompresive strength requie 20 Nimmt
” Ted in the field at 28 days oe
1) Maxim siz of aggregate 20 mun (angular)
©) Degree of workability 090 compacting
factor
&) Degree of quality control Good
©) Type of exposure Mita

022. TEST DATA FOR MATERIALS

a) Cement used—ordinary Portland cement
satisfying the requirements of 1S : 269-1976%

b) Specific gravity of cement 315
e) Specific gravity
1) Goarte aggregate 260
2) Fine aggregate 2:60
dj Water absorption
1) Coarse aggregate 0:5 percent
2) Fine aggregate 10 percent
€) Free (surface ) moisture
1) Coarse aggregate Ni (absorbed
i)
2) Fine aggregate 2-0 percent

£) Sieve analysis
1) Coarse aggregate

Speciation for ordinary and tow beat Portland cement (sid ee

16

18. 181 10262-1982

15 Siew Anatss of Coane Paenoge of Difient Rome
Su Agri hoc Prats
ma (Acta Ping) = m.
q Ta Combined
60 per 40 pce 100 percent
En “Oka
2 10 Conforng
fo HD 0 ds ae
75 340 ET ss se
23 i 1%
2) Fine Aggregate
1 Si Sn Fine Aggro Renarh
cd biting

415 um 100 Contormingtograding

Zone tat Tabet of

Is: 9.107

236 min 100
110 mm E
600 micron co
300 iron 12
150 micron 2

©3. TARGET MEAN STRENGTH OF CONCRETE

C:3.1 For a tolerance fact
strength for the specified el

276 Nimm,
0-4. SELECTION OF WATER CEMENT RATIO
C4.1 From Fig 1, the free water-cement ratio required for the target

mean strength of 27°6 Njmm® is 050. This is lower than the maximum
value of 0°65 prescribed for “Mild” exposure in Appendix A of IS: 456-
19784.

G5, SELECTION OF WATER AND SAND CONTENT

5.1 From Table 4, for 20 mm nominal maximum size aggregate and
sand conforming to grading Zone If, water content per cubic metre of
concrete = 186 kg and sand content as percentage of total aggregate by
absolute volume = 35 percent,

(SEEN or ene and fine agregate rm natural sures for concrete
corrio
Code of practice fr plain and reinforend conctato (ir ein)

1

19. 18 1 10262 . 1982

For change in values in water-cement ratio, compacting factor and
sand belonging to Zone IIT, the following adjustment is required:
Change in Condition Adjvatment Required in
CR Table 6)

Percent Sand in Total
Aggregate
For decrease in water.cement ratio o -20
by (0-60 0-30) that is 01
For increase in compacting factor +3 o
(0908) that is 010
For sand conforming to 2
"Table 4 of 18: 383-1970

ne TT of o

Toul + 3 percent

"Therefore, required sand content as percentage of total aggregate by

absolute volume = 3538 = 31.5 percent
Required water content = 186 + TOS = 106 + 558 = 1916 1/00

C6. DETERMINATION OF CEMENT CONTENT

Water cement ratio = 0:50
Water 191-61

Cement = 988 g/m?

‘This cement content is adequate for mild exposure condition, accor-

ing to Appendix A of IS: 436-1978

G7. DETERMINATION OF COARSE AND FINE AGGREGATE
‘CONTENT

(07.1 From Table 3, for the specified maximum size of agyregate of
20 mm, the amount of entrapped ale in the wet concrete I 2 percent
“Taking this into account sad applying equations from 3.51,
ee la N 1

oem = (1916+ 318 + pars o) Too

z 39, 1 e 1
ang 098 m8 — (19164 Zus + os 266) * 1000

6 fa = 546 kg, and
a= 1187 glas

(Gode of practice for plain and reinforeed concrete (shird ris

15

20. 18 : 10262 - 1982

The mix proportion then becomes:

Water Cement Fine Aggregate Goarse Aggregate
191061 383 kg 546 kg 1187 ky
00:50 1 142 309

G:8. ACTUAL QUANTITIES REQUIRED FOR THE MIX PER BAG
OF CEMENT

0-81 The mix is 0:50: 1 : 1-42: 309 (by mass). For 50 kg of cement,
the quantity of materials are worked out as below:

a) Cement — 50 kg

b) Sand = 710 kg

©) Coarse aggregate

1545 kg (Fraction L — 927 kg,
fraction II = 61.6 kg)
& Water
1) For waterecement ratio of 050 quantity
of water
2) Extra quantity of water to be added for = (++ )077 1
Absorption in case of coarse. aggre:
gate, at 0 percent by mass
3) Quantity of water to be deducted fo
Rec stare present in sand at 2 per
cent by mass
4) Actual quantity of water to be added = 2504077 142
= 256351
€) Actual quantity of sand required after = 710-4 142
allowing for mats of free moisture

250 litres

(=) raed

= 72:42 kg
£) Actual quantity of coarse aggregate required:

1) Fraction 1 = 92:7 — 0-46 = 9224 kg

2) Fraction IL = 61:8 — 0:31 = 61:49 kg

‘Therefore, the actual quantities of different constituents required for
the mix are:
Water : 24:35 kg
Cement : 5000 kg
Sand : 7242 kg
1224 kg
Fraction 11 = 6149 kg

Coarse aggregat

19

21. 15: 10262-1982

APPENDIX D
(Clause 4.1)

DETAILS OF TRIAL MIX

D-1. A typical test programme to establish conerete making properties of
materials obtained from the site of construction by means of laboratory
trials is given below:

Mix No. 1 ( derived according to procedure given in 3 ) consists
othe calculated butch quantiiesequived per mol congele. Since
in actual rial, the mix did not have the desired. workability of 0:30
in terms of compacting Tactor, and the mix was undersanded with
313 percent sand, adjustment in water and sand contenta have been
made in subsequent Mix No, 2. Mix No. 3 and have higher and
lower waterecement ratio than Mix No.2 (by d 10 percent) but
the water content i held constant. Detail of the four wil mixes
And observations on the mixes are given in Table 7

TABLE 7 TYPIGAL TEST RESULTS OF TRIAL MIXES

Mis Qpanrırtus or Marraras rex Conto Cononkre Cnanacrentoriea
No ‘Mara or Conon EE Eee,
= LU A Vist day
Een ne Send Come lame Ob. compre
ARR eS Segal Sue
1 it Nie
o oo 0.0. oa ©
ls ka Nimmt
1 HS HE #8 00 nen —
FU a
2 SE GT 49 OS Ctmie 206
el
percent)
a SL 68089090 Cae 250
oh
percent)
ee ee Cec!
We GE

Wate-cement ratio,

20

22. 1S 4 10262 « 1982

Corta frm page 2)
Concrete Subcommittee, BDC 2:2

ask por
sna ©, R, Aumenannası Stup Consultants Ltd, Bomtay
Sie MC Paros Alert Y
Dypery Diem, Srampanpe Reseach, Derigor and Standards Organisation
TEES) Mises af Railways ) Lucknow
‘Aseitrane Dinvozon,
Soano LMC) € éme)

nro "engineering Research Laboratories Hyderabad
Dinsozon (€ de MDD) Getiral Waker Commision, New Deli
Deren Dineezon LG & MDD)
“Cl
Enz Th Comte Au Ti, Bombay
Sum MP Casar Rao”) Public Works and Housing Department, Romay
Sins VER. Cin Sirucaral Engineering Reseach Cire (CSL,
Suns V. K, Gorra Erin Chiefs Branch, Army He
‘New Damn
Sana D. K. Duncan (Amie
Sun). 3. Hıyanuası Auoeias Consulting Service, Bombay
Mur As Be Ramos (dt)
Sun Po aso he Amociatod Cement Companies Ltd, Boribay
Sit eR, Virage (Alene
Sunt kG. Eotamenadiasa “Engineers India 14d New Delhi
‘Sia Corsa Calera)
‘sung Rasa National Buildings Organization, Sow Dei
LS Sursavasan (Alterno
Suny Gr ke Mirti ‘Hindustan Drefab Lad, New Dei
Sia NE Reo Alterna)
sun tev ar ‘The Hindustan Construction Co Lad, shombay
‘Sut ME Mani (Allan
Sunt Ke Ke Mawnan In

ene xp (Roem Fart Cm

Son YR Paes cond i PAR NE, N
San ER. Onagransen (ion

Da 5.5. Bass Cent icing Rear astute (CSIR)
a ta

Pe pee Gamman Ti ad, notas

Sanı Pavia Roman {Alma
Suputmtes ura kxonmrn Cena] Public Works Depattizent, New Delhi
Meteor rx bro nenes
"E Demon) Itt (lim)
Date Visresranasa (Cement Research Institute of India, New Delhi
Bao Maison ( Alte)

2

23. BUREAU OF INDIAN STANDARDS
Headquarters
Mana Bhavan, 9 Bahador Shah Zafar Marg, NEW DELHI 110002
Teiophones: 323 0131, 325 3378, 323 9402
Fax [phone]
Tolegrams: Manaksansıha

{Comment ficos)
Central Laboratory Telephone
Plot No, 208, Sit IV, Sahibabad Indust! Area, Sahlbabad 201010 ETES

Regional offices:
Central: Manak Bhavan, 9 Bahadur Shah Zafar Mag, NEW DELHI 110002 32378 17
»Eastam : 1/14 CIT Scheme VILM VP. Road, Manila, CALCUTTA 700054 937 88 62
Northern: SCO 335.336, Sector 34-A, CHANDIGARH 160022 CE

Southern: CT. Campus, IV Cross Road, CHENNAI 600113 2952915

Westen: Manakalya, £9, Behind Maro! Telephone Exchange, Andheri Eas), 832 02 95
MUMBA 400089

Branch OMeos::

Pushpa, Nurmehamed Sha Marg, Khanpur, AHMEDABAD 380001 5501348
#Peonya intusvial Aro, 15 Stage, Bangaore-Tumkur Road, 839 49.55,
BANGALORE 560088.
Gangoti Compio, Sth Flor, Shadbhada Road, TT, Nagar, BHOPAL 482003 554021
Plot No, 62.83, Unt Vi, Ganga Nagar, BHUBANESHWAR 781001 403627
Kalakathi Buldings, 870 Avinash Road, COIMBATORE 641097 2101 4s
Plot No, 43, Sector 16 A, Mathura Rand, FARIDABAD 121001 8288801
Saviti Complex, 116 G.T Rag, GHAZIABAO 201001 0.711995
535 Ward No 29, ALS. Barua oad, Sth By lane, GUWAHATI 781003 541197
5-8:500, LN, Gupta Marg, Nampaly Station Road, HYDERABAD 50000 201088
52, Chiavanjan Mar, C-Schome, JAIPUR 302001 372925
117/418 8, Sarvodaya Nagar, KANPUR 208008 216875
Sen Bhawan, 2nd Floor, Behind Levis Cinema, Naval Kishore Pond, 238923
LUERNOW 20001
NIT ing, Second Floor, Gokupat Market, NAGPUR 440010 sn
Patipata Indust Estate, PATNA 800013 262308
Institution of Engineers (nda) Bulcing 1332 Shiva Nagar, PUNE 411005 323626

‘TO. No. 14/1421, Unsory P. O, Palyam, THAUVANANTHAPURAM 695034 621 1

“Sales Off is al5 Chowinghee Approach, P.O. Pncep Stee 2708
(CALCUTTA 700072

Sales flo at Nov Chambers, Grant Road, MUMBA! 400007" 309 65.28

Sales Otfcaisat'F Block, Unity Building, Narashimaraja Squgre 223971

‘BANGALORE 560002

Fepropaphy Unt, BIS, New Dei, Inda