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IS 2720 (Part 2) | Weighing Scale | Soil
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PART II DETERMINATI.ON (
Fiftb Reprint
624.131.431.3
@ CopVrighrt 1973
9 BAHADUR SHAH ZAFAR NEW DELHI llOOO2
IS : 2720 ( Part II ) - 1973
PART II DETERMINATION ( OF WATER CONTENT
Sectional Committee, BDC 23
RePresenting Cent;JorFe$lding Research Institute ( CSIR ),
Soil Erlgineering
PROF DINESHMOHAN
Members PROP ALAM SINGH DR A. BANERJEE SHRI S. GUPTA ( Alternate ) SHRI B. B. L. BHATNAGAR SHRI K. N. DADINA SHRI A. G. DAS~IDAR SHRI R. 1~. DEWAN DR G. S. DHILLON ( CENTRAL DIRECTOR PROF R. N. DOGRA University of Jodhpur, Jodhpur Cementation Co Ltd, Bombay Irrigation & Power Research Institute, Amritsar In personal capacity (P 820, New A&ore, Calcutta 53 ) Hindustan Construction Co, Bombay Irrigation Research Institute, Khagaul, Patna Indian Geotechnical Society, New Delhi SOIL Central Water & Power Commission, New Delhi Alternate ) Indian Institute of Technology, National Buildings Organization, New Delhi New Delhi
MECHANICS RESEARCH STATION ) DEPUTY DIRECTOR ( CSMRS )
Engineering Research Laboratory, Hyderabad DR IQBAL ALI SHRI K. R. SAXEN~ ( Alternate ) Central Building Research Institute ( CSIR ), SHRI G. S. JAIN Roorkee SHRI D. R. NARAHARI ( Alternate ) JoI;;T~~~ RESEARCH ( FE ), Railway Board ( Ministry of Railways )
De~un DIRECTOR RESEARCH ( SOIL MECHANICS ), RDSO ( Alternate ) Rodio,Foundation SHRI G. KIJECKELMANN
SHRI S. K. GULHATI ( Alternate SHRI v. G. HEDGE SHRI J. P. SHARMA ( Alternate )
SHRI A. H. DIVANJI ( Alternate )
SHRI 0. P. MALHOTRA
Engineering Ltd; and Hazarat &
Buildings & Road Research Laboratory,. Public Works Department, Government of PunJab (.Continued On@ge 2 )
@ Copyrvght 1973
BUREAU This publication is protected OF INDIAN STANDARDS
under the Indian Copyright Act (XIV of 1957) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright undbr the said Act.
P. VASUDEVAN Alternate ) ( Public Works Department. K. G. Government of Uttar SHRI H. . C. L. SHRIN. BHANDARI SHRI T.Concrete & Soil Research Laboratory.Institute of-Teebnology-New Delhi SHRI S. CHATUR~EDI( Alternate ) Director General. SAHASI Engineer-in-Chief’s Branch. GUHA . CHATTERJEE
. Government of Tamil Nadu NINGAND DESIGN CIRCLE ) EXEC~JTIVB ENGINEER INCHARGE ( SOIL MECHANICS RESEARCH & DIVISION) ( Alternate ) Institution of Engineers ( India ). AOGARWAI. New Delhi University of Roorkeg. Director ( Civ Engg ) Secretary SHRI G. C.R. Khagaul.artment. RAMAN Deputy Director ( Civ Engg ). K. New Delhi SHRI T.IS : 2720( Part II ) .1973 ( Continuedfrom page 1 )
Members Representing Sum M. K. M. MALHOTRA Dep. S. . Roorkee DR SHAMSHER PRAKASH Irrigation Research Institute.BHATTACHARYYA [ Altemtc) Indian.
University of Jodhpur. MENON ( Alternate ) Central Road Research Institute ( CSIR ). K. VERYA Pradesh SHRI D. NATARAJAN RESEARCHOFFICER Buildings h Roads Research Laboratory. DEWAN Central Water & Power Commission. Army Headquarters -SHRI P. SHARMA Roads Wing ( Ministry of Shipping & Transport ) SHRI S. SINHA SHRI A. Bombav SHRI. AJITHA SIMHA. N. D. PUTHISIGAMANI (Alternate ) SECRETARY Central Board of Irrigation & Power. Patna Snm R. K. S. G. K.V. Government of Punjab SHRI. Public Works Department. M. SWAMINATHAN All India Instruments Manufacturers & Dealers SHRI H. MEHTA Concrete Association of India. N.. Calcutta SHRI C. S. K. Government of Uttar Pradesh Irrigation Research Institute. Government of Punjab MAT K. BISHNOI Alternate ) ( SUPERINTENDING ENGINEER PLAN.N. A. BHARGAVA SHRI A. Jodhpur Central Road Research Institute ( CSIR ). New Delhi Roads Wing ( Ministry of Shipping & Transport )
Public Works Department. Geologists’ Syndicate Private Ltd. Calcutta . 1 !&?matc) ( Co&rued on poBa 17 )
DR R. Public Works ( Department. New Delhi DXRECTOR( CSMRS) DEPUTY DIRECTOR( CSMRS ) ( Alternate ) SHRI H. VERMA Association. Bombay SHRI T. IS1 ( Ex-ojicio Member) &RI D. BX~HNO~Alternate ) ( DR A. Roorkee SHRI H. Public Works Sxnr 0. IS1
Convener PROP ALAM SINGH Members
Subcommittee. GULATI Buildings & Road Research Laboratory.
after the draft finalized by the Soil Engineering Sectional Committee had been approved by the Civil Engineering Division Council.
. rapid determination of water content in soils.
SECTION 1.3 This part was first published in 1964 and revised in 1969 to include two rapid field methods for the determination of water content In this second revision.
. the Indian Standards Institution is bringing out this Indian Standard methods of test for soils ( IS : 2720 ) which will be published in parts.1This FOREWORD
Indian Standard ( Part II ) ( Second Revision ) was adopted by the Indian Standards Institution on 22 March 1973. SCOPE
1. observed or calculated. 0.
V~UW
for rounding off numerkd
( fcohf ).
0. analysis made in accordance with this standard.IS : 2720 ( Part
PART II DETERMINATION OF WATER CONTENT
0. with infra-red lamp torsion balance moisture meter and rapid determination of water content from the gas pressure developed by the reaction of calcium carbide with the free water content of the soil have been included.2 With a view to establish uniform procedures for the determination of different characteristics of soils and also for facilitating comparative studies of the results. it shall’be done in accordance with IS :2-1960*. 0.dry weight. is to be rounded off.4 In the formulation of this standard due weightage has been given to international co-ordination among the standards and practices prevailing in different countries in addition to relating it to the practices in the field in this country. if the final value.1 This *R&s
I OVEN-DRYING
METHOD(STANDARD
the determinatiqn of of the oven-. 0.5 In reporting the result of a test or. 0.
0 For the purpose of this standard. Drier the soil. see IS : 460.
Minimum Quantity of Soil S’ecimcn to% Taken for Test Mass in g 25 50 200 300 500 1000 quantityof the aoil taken. 3.ISt2720(Partll)-1973 2.4 Desiccator -A 4. and on the accuracy of v?-eighing.3 Oven .1). Take the required quantity of the soil specimen in the container crumbled and placed loosely. APPARATUS 3. The following quantities are recommended for general laboratory use: Size of Particles More Than 90 P&cent Passing 425-micron IS Sieve 2-mm IS Sieve 4:75-mm IS Sieve IO-mm IS Sieve 20-mm IS Sieve 40. The size of the specimen selected depends on the quantity required for good representation.1 The soil specimen taken shall be representative of the soil mass. with interior of non-corroding material to maintain the temperature at 110 f 5°C.04 percent of the weight of the soil taken P the test Qr (see 4.
3.mm IS Sieve
NOTEI NOTESFor sizesof dews.
and should not be uacd in
NOTES -Water content sp&mcn
any other tat% 5. the greater &all be the should
desiccator with any suitable desiccating agent. tSpcci&ation
.thermostatically controlled. dry and weigh ( WI ).1962 t. which is influenced by the gradation and the maximum size of particles.
*Glossary of terms and symbols relating to roil engineering for tat sieved (ret&d). 3.1 Clean the container with lid. SOIL SPECIMEN 4. 3.
3. TERMINOLOGY 2. the definitions given in IS : 2809-1972* shall apply.1 container Any suitable non-corrodible air-tight container. (&St ravEon ).2 Balance -of sufficient sensitivity to weigh the soil sam les to an accuracy of 0.
2 The results of the test shall be suitably recorded. ). APPARATUS 9. Reliable water content values for these soils can be obtained by drying in an oven at approximately 60 to 80°C.
.1 The percent of water content shall be calculated as follows: W_ where w = water content percent. Every.1 &nt.1973
and weigh with lid ( W.
6. and maintain the temperature of the oven at 110 f 5°C ( see Note ). and WI = mass of container with lid in g. It is intended as a rapid alternative to the method given in Section 1 but is less accurate and more suitable as a field test. Ws = mass of container with lid with wet soil ing.) of the container with lid with dried soil sample. CALCULATION 6.1 This method covers the determination of the water content of a soil as a percentage of its dry mass. Dry the specimen in the oven for 24 h.time the container is taken out for weighing. REPORT 7. ~0 forma for this record is given in Appendix A. The method shall not be used if it is suspected that the soil contains a large proportion of gypsum calcareous matter or organic matter.
7. ( w ) of the soil shall be reported to two significant A recommended
wsw? ws W.= mass of container with lid with dry soil in g. Record the final mass ( W.&sw + any suitable non-corrodible 5 air-tight container. r/jr. Replace the lid on the container and cool the container in a desiccator. 9.IS : 2720 (Part
NOTE. 7.1 The water content figures.Oven-drying at 110 f 5°C does not result in reliable water contenr values for soil containing gypsum or other minkrals having loosely bound water of hydration or for soil containing significant amounts of organic material. SECTION 8. SCOPE 2 SAND-BATH METHOD
6. Th en keep it in an oven with the lid removed.
4 percent of the mass of the soil taken for the test.7 scoopa convenient
size is one having
size is one about 20 cm long and 10 cm wide.1 percent of the original mass of the soil specimen. remove the container or the tray from the sandThe container should be weighed with lid. being a maximum of 0. Add a few pieces . to an
9. Place the container with the lid removed or the tray on the sand-bath and heat the sand-bath. CALCULATION 12. Dry the specimen to constant mass indicated by the difference between two consecutive masses of the container with lid or the tray with the dried specimen taken at suitable intervals after initial drying. bath.1 The with 4. A convenient method of detecting overheating of the soil is by the use of small pieces of white paper mixed with the soil. Overheating is indicated if the paper turns brown. 12.IS : 2720 ( Part II ) .1. 6
.6 Palette Knife or Steel Spatula blade 10 dm long and 2 cm wide. of suitable for Heating size and containing the Sand-Bath clean
sand to a depth of stove or spirit a
9.1 The percentage of water content shall be calculated as follows:
wsw.of white paper if necessary ( see Note). care being taken to see that no soil is lost in the process.2 Heat-Resistant Tray of suitable metal and about 5 to 7 cm deep. dry and Take the required quantity of the soil specimen in the weigh ( W. When drying is complete.3 Balanceof sufficient sensitivity to weigh the soil samples accuracy of 0. PROCEDURE 11. . ). 9. as the case may be.cool and weigh ( H’s). 9. container crumbled and placed loosely and weigh ( lJ’% ). the specimen shall be turned frequently and thoroughly with the palette knife to assist the evaporation of water.5 Equipment lamp. NOTE-Avoid overheating.4 Sand-Bath at least 3 cm. 9.
10. Care shall be taken not to get the sand-bath too hot.1 Clean the container with lid or the tray. SOIL SPECIMEN 10. mass of soil specimen taken for the test shall be in accordance
11. During heating.1973 9.
REPORT 13. Since methylated spirit is used. Knife Dish10 to 15 cm in diameter.1 Evaporating 15. SECTION 14. APPARATUS 15.3 Balance . SCOPE 14. It is intended as a rapid alternative to the method given in Section 1 but is less accurate and is more suitable as a field test. and on the accuracy of weighing. which is influenced by the gradation and the maxisize of particles.1 and 7.of sufficient rensitivity to weigh the soil samples to an accuracy of 0. 15. SOIL IS.2. 13. calcareous matter or organic matter.1 The good mum Spirit
The soil_ specimen taken shall be representative of the soil mass. = mass of container and
w.1 The water content and the results accordance with 7. The method shall not be used if the soil contains a large proportion of clay.
w. with lid (or tray) with dry soil in g. = mass of container with lid ( or tray ) in g. w.1 This method covers the determination of the water content of a soil as a percentage of its dry mass. 15.IS : 2720 ( Park II ) .4 Methylated 16. = mass of container with lid ( or tray ) with wet soil in g.4 percent of the mass of the soil taken for the test.2 Palette 2 cm wide. Spatula-having a blade 10 cm long and 3 ALCOHOL METHOD of tests shall be reported in
15. gypsum. size of the specimen selected depends on the quantity required for representation. The folIowing 7
.1973 where
water content percent. care shall be taken against risk of fire.
dry and weigh ( WI).1 The percentage of water content shall be calculated as follows:
wsw=w8where w = water content percent.). care being taken to see that none of the soil is lost. W. Water content samples should be discarded and should not be used in any
. the greater shall be the quantity of the soil taken. 19.1973 quantities are recommended for general use: Minimum Quantityof Soil Specimen to be Taken for Test Mass in g 30 300
Size of Particles More Than 90 Percent Passing 2-mm IS Sieve 20-mm IS Sieve
NOTE INOTE 2 NOTE 3 -
For sizes of sieves.1
quantity of the soil specimen in the evaporating dish and weigh ( &).
mass of dish in g. After the methylated spirit has burnt away completely allow the dish to cool and weigh it with the contents ( W. Place the evaporating dish on a surface which will not be affected by heat and ignite the methylated spirit.2.
17.1 and 7. CALCULATION 18. 18. see IS : 460-1962*.
Drier the soil.IS : 2720 ( Part II) .
19. Work the methylated spirit well into the soil with the palette knife and break up any large lumps of soil.
Take the required
every gram of soil taken so that the soil is well covered. Pour over the soil methylated spirit at the rate of about one millilitre for
Clean the evaporating dish. = mass of dish with wet soil in g. and W. PROCEDURE 17. = mass of dish with dry soil in g. Stir the soil constantly with the spatula or knife.
the results of tests shall be reported
*Specificationfor test sieves ( fmirrd).1 The water content and with 7.
23. Provision should be made to adjust the input voltage to the infra-red lamp to control the heat for A suitable thermometer graduated from 40 to 150”~ drying of specimen.
with this method takes 15 to 30 min depending upon NOTE. 1 and 2.1 This section describes
a method for rapid determination of water content of soils employing a device providing infra-red lamp for drying and torsion balance for getting of percentage of water on wet basis from a scale. 22.8 to 1 percelit in case of clays.
. 21. The.The water estimation Plastic soils might take about 30 min. As this moisture.1 Infra-red Lamp and Torsion Balance Moisture Meter-The
moisture meter is illustrated
in its essential details in Fig. The infra-red radiation should be provided by 250 watt lamp built in the balance for use with an alternating current 220-230 V. APPARATUS 21. single phase mains supply.1 The soil specimen taken shall be representative
of the soil mass.3 percent water content in case of grahular soils and about 0. the infra-red lamp. from 1 to 100 percent water content in 0. The weighing mechanism.1 Keep the test samples always in suitable containers so that the water
content to be determined is not affected by ambient conditions.1973
SECTION 4 RAPID DETERMINATION OF WATER CONTENT WITH INFRA-RED LAMP TORSION BALANCE MOISTURE METER 20. and the torsion balance. a torsion balance. SOIL
or Steel Spatula -
having a blade 10 cm long and
22.2 percent divisions. The probable error is about * 0.1.1 The equipment should be of two main parts. The reproducibility of readings is within *to25 percent.
21. 50 cycle.
21. The specimen should weigh 25 g.2 Palette Knife 2 cm wide.IS : 2720 ( Part II ) . and the results obtained are convertible to water content on dry basis. PROCEDURE 23. should have a built in magnetic damper. should be provided for ascertaining the temperature of drying in the pan housing. the maximum size of particle present in the specimen shall be less than 2 mm. meter is calibrated to use 25 g of soil. SCOPE
20. the type of soil and quantity of water present.balance scale should be divided in terms of water percentages.
Stopper 13. Balance arm 12. 20. Initial adjustment knob 7.
Descn@ion Calibrated drum Wire grip for balance Gear Torsion wire Pointer Right-hand wire grip Drum drive knob Index mark Lock Variac knob ( for heat control ) Thermometer Thermometer bracket
28. Left-hand wire grip Gear t * Damping magnet 10: Damping vane 11. 18. On-off switch 5. Wire tensioner 6. 29.
FIG. Base Pan housing 3: Pan 4.IS : 2720 ( Part II ) .1‘973
Description 1. 15. 16. 17. 1
TORSIONBALANCE MOISTUREMETER ( O-100PERCENT ) PLAN (COVER REMOVED) 10
. 19. 14.
6. 23. 4. ) Lamp Lifting Viewing Locking housing handle lens screw
2. knob 27.~ T~RUONBALANCEMOISTURE METER (O-100 PERCENT)FRONTVIEW. Base Pan housing On-off Initial Drum Variac
Description 24. 26.1973
Dcscri@on 1.
switch adjustment drive knob knob (for heat control
Thermometer Thermometer Indicating bracket lamp
29. 28.IS t 2720 ( Part II ) . 22. 19.
the 100 percent scale division of the cahbrated with the index mark with the help of drum drive knob. set the with the index line and the 100 percent scale division. pointer with the help of initial setting knob.8 The criterion for taking the final reading is that the pointer should remain steady on the index mark which shows that the sample has dried Note the drum scale reading against the pointer which to constant mass. Repeat steps 23. 24. the variac control knob can be adjusted accordingly.IS : 2720 ( Part II ) .7
23.1973 23. The pointer will now be above the index mark. The sample will now begin to lose water and rise above the index. lamp with the the thermometer between 95 and drying is around the pointer will
a watch on the columu of mercury on the thermometer when the NOTE -Keep thermometer records a temperature of 105*C. 23.8 with a fresh sample using a cool and clean
the water’ content (m) a~ obtained on the moisture balance scale. 23. check that the pointer is aligned If not. 23.3 Raise the lamp housing and carefully distribute the test material evenly on the sample pan until the pointer returns to the’index mark ( approximately 25 g of the material will be needed in one operation ). 23. thus prestressing the wire through an amount equal to 100 percent ( this represents the amount of unbalance ). rotate the drum scale by turning the drum drive knob until the pointer returns to the index.4 Rotate the drum drive knob anti-clockwise and bring the 0 percent scale division in line with the index mark. is the percent water on the total mass taken.1 to 23. Insert ‘in its socket and bracket. drum to align
23. control the variac in such a manner that there is no more rise in the temperature beyond 110% and the temperature in the If for a particular sample. the temperature is to housing is maintained at 110 * 5’C.6 Lower the lamp housing and switch on the infra-red help of the switch provided on the left-hand side. Adjust the variac control knob 100 on the scale .3 With the pan placed on the pivot. be higher or lower than 1 lO”C. that is.9 pan. 23. Remove the thermometer from its bracket.1s follows:
24. Read the percentage directly from the scale.1 From
m W=lOO-m
.if it is desired that the temperature of 11O’C. the wet mass of the sample. the water content ( tu ) on the dry weight basis shall be calculated . The percent water which is read from the scale is the percent water based upon the initial mass of the sample. To determine the percentage reduction of mass at any instant.
From the calibrated scale of the pressure gauge the percentage of water on total ( wet ) mass of soil is obtained and the same is converted to water content on dry mass of soil.2 26. 28. TEST PROCEDURE
Place sample in pan till the mark on the balance 28. and a
for weighing sample as shown in Fig. cup.5 One Cleaning Brush 26. 3 ).1 Metallic Pressure Vessel .5 mm diameter and one
26. 26.1 This section describes a method for rapid determination of water content from the gas pressure developed by the reaction of calcium carbide with the free water of the soil. 26. 3.
One Bottle of the Absorbent ( Calcium Carbide ) 12. 27. Then lay the chamber down without disturbing the absorbent charge.soil sample.three steel balls of about steel ball of 25 mm diameter.4 Counterpoised Scoop Balance for measuring absorbent ( calcium carbide ). This test requires about 6 g of.1 Set up the balance. Lift off the cup.6 Steel Balls . Transfer the
. Check that cup and body are clean.with clamp for sealing gauge calibrated in percentage water content ( see Fig. Coarse powders may be Cohesive and plastic soils and material are tested ground and pulverized. SOIL SPECIMEN
27.3 Hold the body horizontal and gently deposit one level scoopful of absorbent ( calcium carbide ) halfway inside the chamber.3 26. APPARATUS 26.1973 SECTION 5 RAPID DETERMINATION OF WATER CONTENT FROM THE GAS PRESSURE DEVELOPED BY THE REACTION OF CALCIUM CARBIDE WITH THE FREE WATER OF THE SOIL 25. with addition of stee1 balls in the pressure vessels.2 Unclamp the clamping screw of the instrument sufficiently to move the U-clamp off the cup. otherwise clean it using a brush.1 Sand requires no special preparation. SCOPE 25.IS : 2720 ( Part II’) . arm mass lines up with the index mark. 28. 28.
MOKSTURE METER
soil weighed out as above from the pan to the cup. 11. Balance base Index mark Balance arm stirrup Pan FIG. the 3 smaller steel balls in the cup along with the sample and larger one in the body along with the absorbent.
28. Holding cup and chamber approximately horizontal bring them together without disturbing sample or absorbent. then quickly body of the moisture cup. place the chamber and the absorbent in the cup. 6. Hold the rapid
.4 With gauge downwards ( except when the steel the moisture meter up and down vigorously for 5 turn it so that the gauge is upwards. put the sample in In the case of clayey soils and pastes.
Nore . 4. 5. Gauge O-50% Body cup U-clamp Clamp screw
1. that is.. scoop
2. 10. bring the U-clamp round and clamp the cup tightly into place. 8. 9. 3. give a tap to the meter to ensure that all the contents fall into the
balls are used ) shake seconds.If th’esample is bulky reverse the above placements.1973
Dcscripion
Description 7.IS : 2720 ( Part II ) .
Once more invert the rapid moisture meter and shake up and down to cool the gas. CALCULATION
From the water content ( m ) obtained on the wet mass basis as the reading on the rapid moisture meter. Now holding the unit horizontal rotate it for 10 seconds so that the balls are rolled round the Inside circumference of the body.1973
moisture meter downwards. as a result the absorbent suffers deterioration and will give results on the lower side. the water content ( w ) on the dry mass basis shall be calculated as follows: w = ( lOOm_ m ) X 100 percent
29. amount of the absorbent for a test is taken from the bottle. Replace the lid of the absorbent container firmly as soon as the required. Rest for 20 seconds. The absorbent suffers deterioration with time.
NOTE -When steel balls are used place the 3 smaller balls in the cup along with the soil and the larger one in the body along with the absorbent mdseal up the unit as usual. empty the contents and clean the instrument with a brush.
. again shake for 5 seconds. then turn it with gauge upwards and tap.5 Finally release the pressure slowly ( away from the operator ) by opening the clamp screw and taking the cup out. Hold the rapid moisture meter vertical so that the material in the cup falls into the body.
29. the reading. Hold for one minute.IS : 2720 ( Part II ) . The readings on the meter are the percentages of water on the wet mass basis. Note the reading as usual. Turn the rapid moisture meter with the gauge upwards and When the needle comes to rest take dial horizontal held at chest height.
28. Repeat the rotation-rest cycle until the gauge reading is constant (usually this takes 4 to 8 min ).1
absorbent is highly susceptible to absorption of moisture and SO shall NOTE -The not be exposed to atmosphere. Repeat this for a third time.
ws x 100% w. -
Content w =
Mass of container
and dry soil W.
and wet soil W. w. 1. in g
6. in g -~
WI ). in g
Mass of moisture
( W._.IS : 2720 ( Part II ) .2 )
FOR RECORD OF RESULTS OF TEST DETERMINATION OF WATER CONTENT OF SOIL
of soil sample : of test adopted
Oven drying : Sand-bath Alcohol
APPENDIX ( Clause 7.
Mass of dry soi
( W.. in g _.
C.IS I 2720( Part II ) . VERMA Ltd. N. Banaras PkoF K. M. SAHASI Banaras Hindu University. Army Headquarters MAJ K. B. RAO SHRI K. S. S. JAIN
SHRI A~AR SINGH( Alternate ) United Technical Consultants Pvt Ltd. SINGH Associated Instrument Manufacturers ( India ) Pvt SHRI H. New Delhi DR V.1973
( Continthdfrom page 2 ) Rejwesenting Central Building Roorkee Research Institute ( CSIR ). V. BALIGA ( Alternate )
Members SHRI G. GUPTA ( Alternate ) Engineer-in-Chief’s Branch. New Delhi SHRI M.
5th Byelane. 29. 2 51 71 Shankar Nagar Square. NEW DELHI 110002 : 1 /14 C. 6 32 92 95
Branch Offices: ‘Pushpak’. KANPUR 208005 ( 21 a2 92 Patliputra Industrial Estate. V. 9 Bahadur Shah Zafar Marg. *Eastern Maniktola. 23 1063 HYDERABAD 500001 63471 RI 4 Yudhister Marg. NAGPUR 440010 Institution of Engineers ( India ) Building. Bhadbhada Road. BHUBANESHWAR 751002 5 36 27 531’5.in BangalOre is at Unity Building. CHANDIGARH 160036 Southern tWestern : C.O. 0. Campus. 22 36 71 Bangalore 560002 keprography Unit. I. No. Marol. 5 24 35 PUNE 411005 *Sales Office in Calcutta is at 5 Chowringhee Approach.Peenya Industrial Area 1st Stage.. 331 13 75 Telegrams: Manaksanstha ( Common to all Offices) Telephone 331 01 31 331 1375 I 36 24 99
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BIS. NEW DELHI 110002 Telephones: 331 01 31.India
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Manak Bhavan. 14/1421.. First Floor. 82183. T. University P. Sector 35-C. Narasimharaja Square. Calcutta 700072 tsales Office in Bombay is at Novelty Chimbers. 2 63 48 AHMADABAD 380001 I 2 63 49 $. Barua Road. R. Palayam 1621 15 4 TRIVANDRUM 695035 1621 17 /nspection Offices ( With Sale Point ): Pushpanjali. T. JAIPUR 302005 ( 6 98 32 21 68 76 117/418 B Sarvodaya Nagar. 205-A West High Court Road. Ward No. 1332 Shivaji Nagar. PATNA 600013 623 5 T.
clause 4. fool-note wilir ‘ t ’ mark ) . 1
IS t 2720 ( Part II )-1973 METHODS OF TEST FOR SOILS
PART II DETERMINATION OF WATER COMtENt
( Second Ret&ion )
Altcradonm ( Page 4.1 ): a) Informal table.firsf ing matter: column Substitute the following for the exist-
‘ 425Pm IS Sieve 2-mm IS Sieve 4*75_mm IS Sieve 9.fiohote foot-note:
z&h ‘ * ’ mark ) -
( sco~ddsior).
460 ( Part I )-1978’
Page 8.5-mm IS Sieve ’ the following for the existing b) Nde 1 . clause 16. /irst column ing matter:
for the exist-
( 2-mm IS Sieve 19-mm IS Sieve ’ b) Note 1 Substitute the following
JW IS :
*. note:
the following for the ( Page 4.AMENDMENT NO.Substitute existing foot-note: ’ tSpecification for test sieves: Part I Wire cloth test riewes (~mrd ftilh ).
’ NOTE 1 .1 ): a) Informal tahle.Substitute ‘ NOTE 1 . * Page 8.For sizes of sieves. ’
’ *Specification
for test sieves: Part I Wire cloth test sieves
.50-mm IS Sieve 19-mm IS Sieve 37.For sizes of sieves. see IS: 460 ( Part I )-1978t ‘.
(BDc23) 2
Reprography Unit. Note ) . JVde > ing note:
* NOTB-When steel balls are used. Now holding the unit horizontal rotate it for 10 seconds so that the balls rolled round the inside circumference of the body. In the case of clayey soils and pastea.f~28. revctse the above placement. ’
( Page 15. Hold the rapid moirture meter vertical with the cup downwards and allow the absorbent with the balls to fall into the cup.( Pap 14.9. New Delhi. DIS.If the sample is bulky. that ir. Shake the unit up Now invert the unit and and down vigorously in this position for about 15 reconds. allow the material to fall into the body. India
. put the sample in the chamber and the absorbent in the cup. place the tbree smaller and one bigger balls in the body along with the absorbent and the sample in the cup and aeal up the unit aa usual. place the 3 smaller and one bigger steel balla in the body along with the ahsorbmt. d0t4. clause28.Substitute the following
‘ NOTE. Rest for 20 seconda. Repeat the above cycle until the gauge reading is constnnt Note the reading as usual. ’ ( usually this takes 4 to 8 min ).
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