IRC SP 076: Guidelines for Conventional and Thin Whitetopping (First Revision)

2015·0.56 MB·English

by  Indian Roads Congress

IRC:SP:76-2015
GUIDELINES FOR CONVENTIONAL AND
THIN WHITETOPPING
(First Revision)
Published by:
INDIAN ROADS CONGRESS
Kama Koti Marg,
Sector-6, R.K. Puram,
New Delhi-110 022
June, 2015
Price : `600/-
(Plus Packing & Postage)
IRC:SP:76-2015
First Published : March, 2008
First Revision : June, 2015
(All Rights Reserved. No part of this publication shall be reproduced,
translated or transmitted in any form or by any means without the
permission of the Secretary General, Indian Roads Congress)
IRC:SP:76-2015
Contents
S. No. Description Page No.
Personnel of the Highways Specifications and Standards Committee i - ii
1. Introduction 1
2. Behaviour Mechanism 5
3. Materials 5
4. Mix Proportioning and Strength of Concrete 8
5 Conventional Whitetopping 10
6. Thin Whitetopping (TWT) 16
7. Pre-overlay Design Requirements 17
8 Thickness Design of TWT 18
9 Steps of Construction 22
10. Joints 23
11. Opening to Traffic 26
12. Distresses in Whitetopping 27
13. Special Cases of Whitetopping 27
Future Research 27
References 28
Appendix I Definitions 31
Appendix II Design Example 32
Appendix III Relation Between Benkelman Beam Deflection and Modulus
of Subgrade Reaction on the Top of Asphalt Pavement 35
Appendix IV Demonstration Project of TWT 36
Appendix V Typical Construction Practices Adopted in Urban Areas 38
Appendix VI Typical Distresses in TWT/UTWT Pavements - Causes and
Remedial Measures 40

IRC:SP:76-2015
PERSONNEL OF THE HIGHWAYS SPECIFICATIONS
AND STANDARDS COMMITTEE
(As on 12th January, 2015)
1. Das, S.N. Director General (Road Development) &
(Convenor) Special Secretary to Govt. of India, Ministry of
Road Transport & Highways, New Delhi.
2. Addl. Director General, Ministry of Road
(Co-Convenor) Transport & Highways, New Delhi.
3. Prasad, Vishnu Shankar Chief Engineer (R) S,R&T, Ministry of Road
(Member-Secretary) Transport & Highways, New Delhi.
Members
4. Basu, S.B. Chief Engineer (Retd.), MORTH, New Delhi
5. Bongirwar, P.L. Advisor, L & T, Mumbai
6. Bose, Dr. Sunil Head, FPC Divn. CRRI (Retd.), Faridabad
7. Duhsaka, Vanlal Chief Engineer, PWD (Highways), Aizwal (Mizoram)
8. Gangopadhyay, Dr. S. Director, Central Road Research Institute, New Delhi
9. Gupta, D.P. DG (RD) & AS (Retd.), MORTH, New Delhi
10. Jain, R.K. Chief Engineer (Retd.), Haryana PWD, Sonipat
11. Jain, N.S. Chief Engineer (Retd.), MORTH, New Delhi
12. Jain, Dr. S.S. Professor & Coordinator, Centre of Transportation Engg.,
Dept. of Civil Engg., IIT Roorkee, Roorkee
13. Kadiyali, Dr. L.R. Chief Executive, L.R. Kadiyali & Associates, New Delhi
14. Kumar, Ashok Chief Engineer (Retd.), MORTH, New Delhi
15. Kurian, Jose Chief Engineer, DTTDC Ltd., New Delhi
16. Kumar, Mahesh Engineer-in-Chief, Haryana PWD, Chandigarh
17. Kumar, Satander Ex-Scientist, CRRI, New Delhi
18. Lal, Chaman Director (Project-III), NRRDA (Ministry of Rural
Development), New Delhi
19. Manchanda, R.K. Consultant, Intercontinental Consultants and Technocrats
Pvt. Ltd., New Delhi
20. Marwah, S.K. Addl. Director General, (Retd.), MORTH, New Delhi
21. Pandey, R.K. Chief Engineer (Planning), MORTH, New Delhi
22. Pateriya, Dr. I.K. Director (Tech.), NRRDA, (Ministry of Rural Development),
New Delhi
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IRC:SP:76-2015
23. Pradhan, B.C. Chief Engineer (NH), PWD, Bhubaneswar
24. Prasad, D.N. Chief Engineer (NH), RCD, Patna
25. Rao, P.J. Consulting Engineer, Faridabad
26. Raju, Dr. G.V.S. Engineer-in-Chief (R&B), Rural Roads, Director Research
and Consultancy, Hyderabad
27. Representative of BRO (Shri B.B. Lal), ADGBR, HQ DGBR, New Delhi
28. Sarkar, Dr. P.K. Professor, Deptt. of Transport Planning, School of
Planning & Architecture, New Delhi
29. Sharma, Arun Kumar CEO (Highways), GMR Highways Limited, Bangalore
30. Sharma, M.P. Member (Technical), NHAI, New Delhi
31. Sharma, S.C. DG (RD) & AS (Retd.), MORTH, New Delhi
32. Sinha, A.V. DG (RD) & SS (Retd.), MORTH, New Delhi
33. Singh, B.N. Member (Projects), NHAI, New Delhi
34. Singh, Nirmal Jit DG (RD) & SS (Retd.), MORTH, New Delhi
35. Vasava, S.B. Chief Engineer & Addl. Secretary (Panchayat) Roads &
Building Dept., Gandhinagar
36. Yadav, Dr. V.K. Addl. Director General (Retd.), DGBR, New Delhi
37. The Chief Engineer (Shri Kaushik Basu), MORTH, New Delhi
(Mech.)
Corresponding Members
1. Bhattacharya, C.C. DG (RD) & AS (Retd.), MORTH, New Delhi
2. Das, Dr. Animesh Professor, IIT, Kanpur
3. Justo, Dr. C.E.G. Emeritus Fellow, 334, 14th Main, 25th Cross, Banashankari
2nd Stage, Bangalore
4. Momin, S.S. Former Secretary, PWD Maharashtra, Mumbai
5. Pandey, Dr. B.B. Advisor, IIT Kharagpur, Kharagpur
Ex-Officio Members
1. President, (Bhowmik, Sunil), Engineer-in-Chief,
Indian Roads Congress PWD (R&B), Govt. of Tripura
2. Honorary Treasurer, (Das, S.N.), Director General
Indian Roads Congress (Road Development), & Special Secretary to Govt. of
India, Ministry of Road Transport & Highways
3. Secretary General, Nahar, Sajjan Singh
Indian Roads Congress
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IRC:SP:76-2015
GUIDELINES FOR CONVENTIONAL AND
THIN WHITETOPPING
1. INTRODUCTION
1.1 IRC:SP:76 “Tentative Guidelines for Conventional, Thin and Ultra-Thin
Whitetopping” was first published in 2008. The Composite Pavement Committee (H-9)
of IRC felt the necessity to revise this document. The revised draft document prepared
by the H-9 committee was discussed in series of meetings. The H-9 Committee finalized
the draft document in its meeting held on 19th December, 2015 for placing it before the
Highways Specifications & Standards Committee. The HSS Committee in its meeting held on
12th January, 2015 approved this document. The Council in its 204th meeting held at
Bhubaneshwar (Odisha) on 19th January, 2015 approved the draft revision of IRC:SP:76
“Guidelines for Conventional and Thin Whitetopping” after taking on board the comments
offered by the members.
The Composition of Composite Pavement Committee (H-9) is as given below:
Bongirwar, P.L. -------- Convenor
Das, Dr. Animesh -------- Co-convenor
Nirmal, S.K. -------- Member Secretary
Members
Arora, V.V. Negi, T.T.
Bose, Sunil Mathur, Sudhir
Chaurasia, Navin Kumar Pandey, Dr. B.B.
Deshmukh, Dr. V. Vilas Sharma, Dr. Sivarama
Jain, Lalit Kumar Shukla, R.S.
Jain, R.K. Singh, Nirmal Jit
Jha, Bidur Kant Singh, Vivek
Kharwadkar, Vivek Sitaramanjaneyulu, K.
Kumar, Pushp Swamy, Dr. Arvind Krishna
Kumar, Satander Thombare, Vishal
Mallick, Prof. (Dr.) Rajeev Veerragavan, Dr. A.
Corresponding Members
Reddy, Dr. Sudhakar Bhonsale, Dr. Sukhanand
Justo, Dr. C.E.G.
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IRC:SP:76-2015
Special Invitee
Kumar Binod
Ex-Officio Members
President, (Bhowmik, Sunil), Engineer-in-Chief,
Indian Roads Congress PWD (R&B), Govt. of Tripura
Honorary Treasurer, (Das, S.N.), Director General
Indian Roads Congress (Road Development), & Special
Secretary to Govt. of India, Ministry of
Road Transport & Highways
Secretary General, Nahar, Sajjan Singh
Indian Roads Congress
1.2 Background
1.2.1 Whitetopping is defined as a Portland Cement Concrete (PCC) overlay constructed
on the top of an existing bituminous pavement. Whitetopping is thus PCC resurfacing (overlay)
as a rehabilitation or structural strengthening alternative on bituminous pavement. The PCC
overlay may or may not be bonded to the layer below.
1.2.2 Rutting of bituminous pavement is a real problem in hot climate like India, with
heavy truck loads, operating under frequent start/stop conditions. A PCC overlay is commonly
applied where rutting of bituminous pavements is a recurring problem. Concrete overlays offer
the potential for extended service life, increased structural and functional capacity, reduced
maintenance requirements, and lower life-cycle costs when compared with bituminous
overlay alternative.
1.2.3 Concrete overlays have been used to rehabilitate both the existing bituminous
(flexible) pavement since 1918 and existing concrete pavement since 1913. Whitetopping
in its various forms has been used in the USA and Europe on Airports, Inter-state roads,
Primary & Secondary Highways, Local Roads, Streets and Parking lots to improve the
performance, durability and riding quality of deteriorated bituminous pavement surfaces.
There has been a renewed interest in whitetopping, particularly, in Thin Whitetopping during
the last two decades. This has been possible due to several successful high profile projects
executed in USA, Europe and India. Their effectiveness has further renewed interest in them
because they satisfy the demand caused by rapidly deteriorating highways confronted with
limited fund availability. Conventional Whitetopping, and Thin Whitetopping (TWT) with 15-
20 years of design life offer immense potential as a rehabilitation strategy for Indian roads.
Several successful projects have been executed at Pune, Mumbai, Delhi, Nagpur, Jaipur and
Bangalore in the last few years. The performance of these sections has been found to be
satisfactory.
1.2.4 PCC overlays are also placed on existing concrete surfaces, as rehabilitation/
strengthening measure. Such overlays, even though used on experimental basis for
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