Restoration of Monsoon Damaged Roads
Content
by the Jaipur Development Authority (JDA)
Notes of Prof. Prithvi Singh Kandhal on the Meeting with Shri S.K. Pancholy, Director of Engineering, JDA and His Staff on 22 October, 2010 Prof. Prithvi Singh Kandhal met with Shri S.K. Pancholy, Director of Engineering JDA, Shri B.D. Sharma, Superintending Engineer, JDA and other engineers of the JDA on 22 October 2010. The following topics were discussed: 1. Successful Production and Performance of the Idiot Proof, Effective and Cheap Road Pothole Patching Mix As desired by Shri Sudhanshu Pant, Commissioner, JDA, about 5
Restoration of Monsoon damaged Roads
tons of the subject mix were produced under the voluntary potholes were made wet (to simulate rainy weather) and filled with
supervision of Prof. Kandhal for trial on Jaipur roads. Several this mix on Tonk road (near Narain Singh Circle), Abhimanyu Marg, and other locations under the supervision of Prof. Kandhal. These patches are performing extremely well under traffic. Additional 5 tons of this mix will be made during the first week of November.
JDA engineers were asked by Shri B.D. Sharma, S.E. to fill potholes in their zones on roads which are not planned for resurfacing at least for one year so that the performance of the patches can be documented and photographs taken.
monitored. Locations of the patches made with mix should be
Since this generic patching mix has been very successful; it can be made by any contractor in Jaipur; and its cost is about 1/5 of the patented Shellmac material currently used by the JDA, it was decided to make it a BSR item so that tenders can be invited to life of at least 6 months. Expensive, patented products should not be used next year. Shri Ajay Garg, EE, would ensure that this its specification which must be followed by the supplier. generic patching mix is made a BSR item; he already has access to produce this mix next year prior to monsoon. This mix has a storage
2. Roadmap for Restoration of Roads in Jaipur
Prof. Kandhal on 5 September 2010 to Shri Pant, JDC and Director
Roadmap for restoration of damaged roads in Jaipur was sent by
of Engineering, JDA. However, it was pointed out to Shri Pancholy
and his staff that it is not being followed entirely in the tenders specified as a binder course in lieu of DBM under BC Grading 2, wherever two bituminous courses are needed to restore proper Shri B.D. Sharma assured this will be followed in future tenders. 3. Quality Control of Bituminous Concrete (BC) Mixes
invited so far. For example, BC Grading 1 should have been
camber or slope for drainage or for extra strengthening of roads.
AEN (in lieu of JEN) at each hot mix asphalt plant for quality control. the contractors do not have the necessary testing equipment (such as bitumen content testing apparatus) and do not conduct this test on a daily basis. Prof. Kandhal’s observations were based on his visit
Prof. Kandhal had read in a local newspaper that JDA will depute an
Prof. Kandhal asked Shri Pancholy as to how it can be done when
to three asphalt plants as a volunteer citizen of Jaipur. As per
contract, it is the responsibility of the contractor to determine the bitumen content and gradation of the stone used at least twice daily. In absence of proper equipment even if the JDA deputes an
Executive Engineer at each plant, the quality control cannot be done at all. Although the JDA engineers said they would look into it, Prof. Kandhal did not see any enthusiasm or will in the meeting on this BC Grading 1 and 2 mixes will not have the desired durability. JDA engineers should be asked to go personally on a regular basis and is of serious concern.
aspect of quality control. Under such circumstances even the new
check all asphalt plants and report to Shri Pant because this matter
4. Addition of Hydrated Lime to All Asphalt Mixes in Jaipur
August 2010 it was decided that 2% hydrated lime would be added to every ton of asphalt mix produced in Jaipur. This is absolutely necessary because the locally available quartzite stone is not
When Prof. Kandhal met with Shri Pant and JDA engineers on 13
compatible with bitumen and the latter peels off (strips off) the
stone surface in presence of water. Lime acts as an antistrip agent. This was also reiterated in the JDA Workshop conducted by Prof. Kandhal on 23 August 2010. When Prof. Kandhal visited some asphalt plants recently, he did not find lime being used. JDA is added to every ton of hot mix. engineers should visit the plants unannounced and ensure that lime
5. Recycling of Roads and Streets in Jaipur
milling and recycling of asphalt roads in Jaipur so that we do not
Prof. Kandhal read in a local newspaper that JDA is considering
keep piling layer after layer on our roads thus raising them. It was the Central Road Research Institute (CRRI). Prof.
mentioned in the newspaper that JDA would seek assistance from mentioned to Shri Pancholy that he had prepared a manual for
Kandhal
recycling and conducted training in recycling for highway engineers of all 50 states of the US. He offered his technical assistance to JDA on a voluntary basis as is the case right now, if needed by them.
National Center for Asphalt Technology
Submitted by: Prof. Prithvi Singh Kandhal Associate Director Emeritus
Auburn University, Alabama USA (Currently in Jaipur) 29 October 2010
Notes of Prof. Prithvi Singh Kandhal on the Meeting with Shri S.K. Pancholy, Director of Engineering, JDA and His Staff on 22 October, 2010 Prof. Prithvi Singh Kandhal met with Shri S.K. Pancholy, Director of Engineering JDA, Shri B.D. Sharma, Superintending Engineer, JDA and other engineers of the JDA on 22 October 2010. The following topics were discussed: 1. Successful Production and Performance of the Idiot Proof, Effective and Cheap Road Pothole Patching Mix As desired by Shri Sudhanshu Pant, Commissioner, JDA, about 5
Restoration of Monsoon damaged Roads
tons of the subject mix were produced under the voluntary potholes were made wet (to simulate rainy weather) and filled with
supervision of Prof. Kandhal for trial on Jaipur roads. Several this mix on Tonk road (near Narain Singh Circle), Abhimanyu Marg, and other locations under the supervision of Prof. Kandhal. These patches are performing extremely well under traffic. Additional 5 tons of this mix will be made during the first week of November.
JDA engineers were asked by Shri B.D. Sharma, S.E. to fill potholes in their zones on roads which are not planned for resurfacing at least for one year so that the performance of the patches can be documented and photographs taken.
monitored. Locations of the patches made with mix should be
Since this generic patching mix has been very successful; it can be made by any contractor in Jaipur; and its cost is about 1/5 of the patented Shellmac material currently used by the JDA, it was decided to make it a BSR item so that tenders can be invited to life of at least 6 months. Expensive, patented products should not be used next year. Shri Ajay Garg, EE, would ensure that this its specification which must be followed by the supplier. generic patching mix is made a BSR item; he already has access to produce this mix next year prior to monsoon. This mix has a storage
2. Roadmap for Restoration of Roads in Jaipur
Prof. Kandhal on 5 September 2010 to Shri Pant, JDC and Director
Roadmap for restoration of damaged roads in Jaipur was sent by
of Engineering, JDA. However, it was pointed out to Shri Pancholy
and his staff that it is not being followed entirely in the tenders specified as a binder course in lieu of DBM under BC Grading 2, wherever two bituminous courses are needed to restore proper Shri B.D. Sharma assured this will be followed in future tenders. 3. Quality Control of Bituminous Concrete (BC) Mixes
invited so far. For example, BC Grading 1 should have been
camber or slope for drainage or for extra strengthening of roads.
AEN (in lieu of JEN) at each hot mix asphalt plant for quality control. the contractors do not have the necessary testing equipment (such as bitumen content testing apparatus) and do not conduct this test on a daily basis. Prof. Kandhal’s observations were based on his visit
Prof. Kandhal had read in a local newspaper that JDA will depute an
Prof. Kandhal asked Shri Pancholy as to how it can be done when
to three asphalt plants as a volunteer citizen of Jaipur. As per
contract, it is the responsibility of the contractor to determine the bitumen content and gradation of the stone used at least twice daily. In absence of proper equipment even if the JDA deputes an
Executive Engineer at each plant, the quality control cannot be done at all. Although the JDA engineers said they would look into it, Prof. Kandhal did not see any enthusiasm or will in the meeting on this BC Grading 1 and 2 mixes will not have the desired durability. JDA engineers should be asked to go personally on a regular basis and is of serious concern.
aspect of quality control. Under such circumstances even the new
check all asphalt plants and report to Shri Pant because this matter
4. Addition of Hydrated Lime to All Asphalt Mixes in Jaipur
August 2010 it was decided that 2% hydrated lime would be added to every ton of asphalt mix produced in Jaipur. This is absolutely necessary because the locally available quartzite stone is not
When Prof. Kandhal met with Shri Pant and JDA engineers on 13
compatible with bitumen and the latter peels off (strips off) the
stone surface in presence of water. Lime acts as an antistrip agent. This was also reiterated in the JDA Workshop conducted by Prof. Kandhal on 23 August 2010. When Prof. Kandhal visited some asphalt plants recently, he did not find lime being used. JDA is added to every ton of hot mix. engineers should visit the plants unannounced and ensure that lime
5. Recycling of Roads and Streets in Jaipur
milling and recycling of asphalt roads in Jaipur so that we do not
Prof. Kandhal read in a local newspaper that JDA is considering
keep piling layer after layer on our roads thus raising them. It was the Central Road Research Institute (CRRI). Prof.
mentioned in the newspaper that JDA would seek assistance from mentioned to Shri Pancholy that he had prepared a manual for
Kandhal
recycling and conducted training in recycling for highway engineers of all 50 states of the US. He offered his technical assistance to JDA on a voluntary basis as is the case right now, if needed by them.
National Center for Asphalt Technology
Submitted by: Prof. Prithvi Singh Kandhal Associate Director Emeritus
Auburn University, Alabama USA (Currently in Jaipur) 29 October 2010
