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भारतीय मानक IS 1208 (Part 2) : 2023

Indian Standard

टार और िबटुिमनस सामग्री के परी�ण

के तरीके
भाग 2 इलािस्टक �रकवरी का िनधार्रण
( दसू रा पनु री�ण )

Methods for Testing Tar and

Bituminous Materials
Part 2 Determination of Elastic Recovery
( Second Revision )

ICS 75.140

 BIS 2023

भारतीय मानक ब्यरू ो

BUREAU OF INDIAN STANDARDS
मानक भवन, 9 बहादरु शाह ज़फर मागर्, नई िदल्ली - 110002
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI - 110002
www.bis.gov.in www.standardsbis.in

March 2023 Price Group 4

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Bitumen, Tar and Related Products sectional committee, PCD 06

FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards after the draft finalized by the Bitumen, Tar
and Related Products Sectional Committee had been approved by the Petroleum, Coal and Related Product
Division Council.
This standard was originally published in 1958 as ‘Methods for testing tar and bituminous materials —
Determination of ductility. The first revision was carried out in 1978. ‘Methods for testing tar and bituminous
materials’ was published as series of 22 standards in the form of a booklet, as listed below:

IS No. Title
IS 1201 : 1978 Sampling
IS 1202 : 1978 Determination of specific gravity
IS 1203 : 1978 Determination of penetration
IS 1204 : 1978 Determination of residue of specified penetration
IS 1205 : 1978 Determination of softening point
IS 1206 Determination of viscosity:
(Part 1) : 1978 Industrial viscosity
(Part 2) : 1978 Absolute viscosity
(Part 3) : 1978 Kinematic viscosity
IS 1207 : 1978 Determination of equiviscous temperature (EVT)
IS 1208 : 1978 Determination of ductility
IS 1209 : 1978 Determination of flash point and fire point
IS 1210 : 1978 Float test
IS 1211 : 1978 Determination of water content dean and stark method
IS 1212 : 1978 Determination of loss on heating
IS 1213 : 1978 Distillation test
IS 1214 : 1978 Determination of matter insoluble in benzene
(Withdrawn due to toxic nature of benzene)
IS 1215 : 1978 Determination of matter insoluble in toluene
IS 1216 : 1978 Determination of solubility in carbon disulphide trichloroethylene
IS 1217 : 1978 Determination of mineral matter ash
IS 1218 : 1978 Determination of phenols
IS 1219 : 1978 Determination of naphthalene
IS 1220 : 1978 Determination of volatile matter content
However, the committee responsible for the formulation of standards in the field of bitumen, tarand related products
decided to publish these Indian standards separately for each test so as tomake it user friendly.
The second revision has been taken up to keep pace with the latest technological development and international
practices. In this revision following major changes have been made:
a) Method for determination of elastic recovery has been incorporated in the standard;
b) This standard has been divided into two parts as listed below:

1) Method for testing tar and bituminous materials: Part 1 Determination of ductility.
2) Method for testing tar and bituminous materials: Part 2 Determination of elastic recovery.
c) Method for determination of elastic recovery is based on IRC method and prepared as specified in
IS 15462.
The composition of the committee, responsible for formulation of this standard is listed in Annex A.
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 : 2022 ‘Rules for rounding off numerical values (second revision)’. The number of significant places retained
in the rounded off value should be the same as that of the specified value in this standard.
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IS 1208 (Part 2) : 2023

Indian Standard
METHODS FOR TESTING TAR AND BITUMINOUS
MATERIALS
PART 2 DETERMINATION OF ELASTIC RECOVERY
( Second Revision )

1 SCOPE 5.2 Thermometer — Any standard thermometer

This standard covers the method of determination of of equivalent range and accuracy shall be used.
the elastic recovery of modified bitumen. This is a 5.3 Scissors — Any type of conventional scissors
simple test intended to optimize dose of polymeric capable of cutting modified bitumen at the test
additive in bitumen and also help in assessing temperature.
quality of PMB in laboratory.
5.4 Scale — Any transparent scale of measuring
2 REFERENCES up to 25 cm with ± 1 mm accuracy.
The following standards contain provisions, which 6 PROCEDURE
through reference in this text, constitute provisions
of this draft standard. At the time of publication, the 6.1 Prepare the test specimens in a set of three
editions indicated were valid. All standards are moulds as per dimensions given in Fig. 1 and
subject to revision and parties to agreements based condition as prescribed in test method of IS 1208.
on this standard are encouraged to investigate the Elongate the test specimen at the specified rate to a
possibility of applying the most recent editions of deformation of 10 cm at a rate of (5 ± 0.25) cm/min.
the standards listed below: Immediately cut the test specimen into two halves at
IS No. Title the midpoint using the scissors. Keep the test
specimen in the water bath in an undisturbed
IS 334 : 2002 Glossary of terms relating to condition for 1 h before testing.
bitumen and tar (third revision)
IS 1208 (Part 1) : 6.2 After the 1 h time period, move the elongated
Determination of ductility
2023 half of the test specimen back into position near the
fixed half of the test specimen so the two pieces of
3 TERMINOLOGY modified bitumen just touch. Record the length of
For the purpose of this standard the following the recombined specimen as X.
definition and those given in IS 334 shall apply.
7 REPORT
4 PRINCIPLE
The elastic recovery of modified bitumen is Calculate the percent/elastic recovery by the
evaluated by comparing recovery of thread after following procedure:
conditioning for 1 h at specified temperature and the 10−𝑋𝑋
specimen is elongated up to 10 cm deformationin a Elastic recovery (%) = × 100
10
ductility machine. This is intended to assess degree where
of bitumen modification by Elastomeric additives.
The cross-section of the specimen mould shall be as X = length of recombined specimen.
shown in Fig.1.

5 APPARATUS
5.1 Ductility Machine and Moulds — As per IS
1208 Part1 and Fig. 1.

1
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IS 1208 (Part 2) : 2023

A – 36.5 ± 0.1 mm
B – 30.0 ± 0.1 mm
C – 17.0 ± 0.1 mm
D – 10.0 ± 0.1 mm
E – 10.0 ± 0.1 mm

FIG. 1 DESIGN OF MOULD FOR ELASTIC RECOVERY

2
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IS 1208 (Part 2) : 2023

ANNEX A
(Foreword)
COMMITTEE COMPOSITION
Bitumen, Tar and Related Products sectional committee, PCD 06

Organization Representative(s)
CSIR - Central Road Research Institute, New Delhi DR AMBIKA BEHL (Chairperson)
Airports Authority of India, New Delhi SHRI VINOD KUMAR SHARMA
SHRI SUPRIO GOSH (Alternate)
Bharat Petroleum Corporation Limited, Mumbai SHRI C. SHANMUGANATHAN
MS SONAL MAHESHWARI (Alternate)
Birla Institute of Technology and Science, Pilani SHRI SRIDHAR RAJU
CSIR - Central Road Research Institute, New Delhi DR SIKSHA SWAROOP KAR
CSIR - North East Institute of Science and Technology, DR SHASHI D. BARUAH
Jorhat DR B. P. BARUAH (Alternate)
Central Public Works Department, New Delhi SHRI DIVAKAR AGRAWAL
Chennai Petroleum Corporation Limited, Chennai DR V. SELVAVATHI
SHRI H. RAMAKRISHNAN (Alternate)
Dilip Buildcon Limited, Bhopal SHRI B. B. KAMESWARA RAO
SHRI ANUSH K. C. (Alternate)
Directorate General Border Roads, New Delhi LT COL NITIN CHANDRA JOSHI
SHRI ARNAB CHAKRABORTY (Alternate)
Directorate General of Quality Assurance, Ministry of SHRI VIVEKANAND
Defence, New Delhi SHRI ANIL KUMBHARE (Alternate)
SHRI SACHIN VINAYAK ZOPE (Alternate)
Engineer in Chief Branch, New Delhi SHRI R. JAYAPRASAD
SHRI O. P. SRIVATAVA (Alternate)
G R Infra-Projects Limited, Gurugram SHRI U. C. GUPTA
GP Global Asphalt Private Limited, New Delhi SHRI RAJESH KUMAR JAIN
Highways Research Station, Chennai MS ER S. USHA DEVI
SHRI ER S. YAMINI (Alternate)
Hindalco Industries Limited, Mumbai SHRI HARSHAD KUMAR PANDIT
Hindustan Colas Private Limited, Mumbai SHRI T. K. SUBHAASH
SHRI K. G. RANGANATHA (Alternate)
Hindustan Petroleum Corporation Limited (HP Green R & SHRI B. RAVI
D Center), Bengaluru SHRI K. RAGHAVA KRISHNA (Alternate)
Hindustan Petroleum Corporation Limited, Mumbai SHRI SANTOSH DHAKU BHOGALE
IRB Infrastructure Developers Limited, Mumbai SHRI SUDHIR HOSHING
SHRI JITENDER CHAUHAN (Alternate)
MS SONALI SARKAR (Alternate )
Indian Institute of Petroleum, Dehradun SHRI MANOJ SRIVASTAVA
DR KAMAL KUMAR (Alternate)
Indian Institute of Technology Bombay, Mumbai DR DHARAMVEER SINGH
Indian Institute of Technology Delhi, New Delhi SHRI ARAVIND SWAMY
Indian Institute of Technology Madras, Chennai DR J. MURALI KRISHNAN
DR A. VEERARAGHAVAN (Alternate)

3
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IS 1208 (Part 2) : 2023

Organization Representative(s)
Indian Institute of Technology, Roorkee SHRI SHAM SUNDAR RAVINDRANATH
Indian Oil Corporation Limited - Refineries and Pipelines SHRI S. SARKA
Division, New Delhi SHRI K. MEDHI (Alternate)
DR MONIKA (Alternate)
Indian Oil Corporation Limited, New Delhi DR N. S. RAMAN
Indian Road Congress, New Delhi SHRI S. K. NIRMAL
SHRI R. V. PATIL (Alternate)
Indian Oil Total Private Limited, Mumbai SHRI PANKAJ KUMAR JAIN
SHRI GAURAV GOGNE
Ministry of Road Transport and Highways, New Delhi SHRI SANJEEV KUMAR
SHRI VARUN AGGARWAL (Alternate)
National Institute of Technology, Warangal SHRI VENKAIAH CHOWDARY
DR S. SHANKAR (Alternate)
National Rural Roads Development Agency, New Delhi SHRI B.C. PRADHAN
National Test House, Kolkata SHRI VINAY KUMAR
Nayara Energy Limited, Mumbai SHRI MRIGANKA TARAFDAR
SHRI DHIRAJ GONDALIA (Alternate)
Om Infracon Private Limited, Guwahati SHRI A. N. DAS
Ooms Polymer Modified Bitumen Private Limited, SHRI B.R. TYAGI
Gurugram SHRI PALASH KATHAL (Alternate)
Shell Bitumen India Private Limited, Gurgaon SHRI NILANJAN SARKER
Zydex Industries Limited SHRI AJAY RANKA
SHRI VISHAL SALUJA (Alternate)
SHRI HIMANSHU AGARWAL (Alternate)
Directorate General, BIS SHRIMATI MEENAL PASSI, SCIENTIST
‘E’/DIRECTOR AND HEAD (PETROLEUM, COAL AND
RELATED PRODUCTS) [REPRESENTING DIRECTOR
GENERAL (Ex-officio)]

Member Secretary
SHRI. HARI MOHAN MEENA
SCIENTIST ‘C’/DEPUTY DIRECTOR,
(PETROLEUM, COAL AND RELATED PRODUCTS), BIS

4
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development of the activities of standardization, marking and quality certification of goods and attending to
connected matters in the country.

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Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the website-
www.bis.gov.in or www.standardsbis.
This Indian Standard has been developed from Doc No.: PCD 06 (17367).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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