Sir It’s nice presentation. Many doubts about HIPR in mind were answered. Very useful as many highways professional are adopting this new technology. 👏👏👏👏👏👏👏👏
Very well explained Sir. Sir I have a query, on one hand we are talking about IRC 120 - 2015 while on the other side we are refering ASTM too. Don't we have all information in IRC?
Another excellent video and explanation in simple words Dear sir Kindly note one more topic that is now a days promoted by Asphalt institute on their website as well as in MS2 and that is "Bailey's method" for VMA control and cost control with that. It involves too much calculations and hence your explanation on this topic required
Sir, it was a really nice lecturer. I have few doubts sir. Please clear them. 1. Is use of lime is mandatory for achieving the desired gradation? 2. When we are preparing the mixes, you said first we have to take RAP in the mixer and followed by rejuvenator. If we add rejuvenator extra it will increase the total weight of the mix. Or we use rejuvenator as a replacement. If rejubenator is used as a replacement then what is replaced by rejuvenator. 3. Total weight of the mix is shown to be 1250 grams in the video. But as per Marshall mix Design method it should be 1200 grams. Clear me this sir.
the purpose of lime is not really to get the desired grading, it is used as anti-stripping agent. Otherwise cement is also a good filler. rejuvenator is used in small quantity and it will not affect the mix much. It is used to reduce the viscosity of the aged binder In Marshall mix design also we take 1200 g of aggregate and then add bitumen, same is here. The Marshall mold will accommodate around 1200 g and extra material is removed after final compaction.
Thank you sir for taking your valuable time in giving reply to my doubt. I have a small question based on your reply given to me. If lime is intended to add as an anti stripping agent then, my question is Is use of anti stripping agents are compulsory when we are designing the RAP mixes. Because for normal mixes we generally don't bother about anti stripping agents. What is the importance of anti stripping agents in the design of RAP mixes? Clear me this doubt sir.
Sir, can u explain how pavement layers are behavior.. 1. If DBM layer is constructed with VG40 and BC layer with CRMB. 2.VG 40 for both BC & DBM layers? Which method is best for the performance point of view
There is no direct answer to this question. It would depend upon the maximum daily tempearture of the region. If you use harder grade of binder (like VG or CRMB) in a cold area, it will create problem of cracking and the pavement will fail prematurely. If you use them in hot region, then the pavement will last longer. Advantage of using CRMB (or PMB) in top layer is best achieved when traffic load is heavy (either in number or in magnitude). Otherwise VG 40 is good enough in both the layers.
Sir if we want to find out physical properties of RAP material, then the different test of aggregate should be done on extracted aggregate from RAP by aggregate extraction test???
@@SatishIITR is that mean sir if all test results are within required limits then we can use that RAP in road without extracting binder?? i.e. by measuring net bitumen percentage for mix after adding RAP?
Hi sir, BC mix design Marshall mix design with use of plastic waste me kitne proportion percentage me aggregates bitumen lena hai please tell 5%,6%,7%,8%,9%,10% plastic waste rahega and bitumen ke sath mix karna hai iska lab procedure bata dijiye
If you are working with dry process then find the OBC as per normal Marshall Method (without adding plastic), and then add plasic @ 8 % by weigth of bitumen. Prepare the mix and find all other properties. IRC SP 98 says no reduction in OBC be made due to addition of plastic. If you are working with wet process, design the mixer to mix the palstic with bitumen and conduct all tests as per IRC 53
There is no need to find Gmb of RAP. The bulk specific gravity of the mix (RAP + virgin material) is to be determined as we do in the normal mix design.
@@SatishIITR Yes sir, to find Gsb of total aggregate of mix in which we are using RAP.....we have to take specific gravity of RAP and its percentage....for that formula i am asking about sir...
It was a wonderful video Sir. Many doubts were cleared. Sir, MS-2 suggest to use one PG grade softer grade if RAP is in between 15-25%. Are we also considering one grade softer concept for Viscosity Grading too ? My reasoning is that VG-30 and VG-20 can of the same Performance Grade, that may not follow the current MS-2 criteria. Please keep sharing such wonderful videos. Sincerely Ankit
Very Informative ......As usual again a very wonderful presentation Sir...
Many many thanks
Sir It’s nice presentation.
Many doubts about HIPR in mind were answered. Very useful as many highways professional are adopting this new technology.
👏👏👏👏👏👏👏👏
Thanks, keep watching and share the link with others as well
Very very Informative Content......
Plz Sir make next vedio on SMA Mix Design
Thanks, will do very soon.
Please sir, explaination one more topic : Refusal Density Concept
Insightful content on HMA with RAP... Thanks you sir... Waiting for more videos related to pavements 😊😊😊
Keep watching
Thankyou for sharing your knowledge sir. Really greatful.
Kindly make a video on cold mix asphalt.
Ok, noted
Nice conceptual description. Thank you
Thanks a lot. Keep watching and also suggest some topics for future videos.
very informative .thanks sir
Thanks, share the link with your friends, please.
Once again a wonderful lecture sir. Thank you. Sir it would be great if a lecture is made on CIP mix design !
yes, working on this topic also. keep watching.
Thank You very much Sir for your guidance
Always welcome
Very well explained Sir.
Sir I have a query, on one hand we are talking about IRC 120 - 2015 while on the other side we are refering ASTM too. Don't we have all information in IRC?
Information in IRC are also taken from ASTM. sorry, if it created any confusion,
Sir, what should we follow?
Is IRC not complete for RAP as we are refering charts from ASTM
Another excellent video and explanation in simple words
Dear sir
Kindly note one more topic that is now a days promoted by Asphalt institute on their website as well as in MS2 and that is "Bailey's method" for VMA control and cost control with that. It involves too much calculations and hence your explanation on this topic required
Thanks for your suggestion, but this method is not in use in India. Still will try to see the literature and prepare
Sir what is the milling depth decision in these strategies. Is there any standard for this / as per site condition the minimum value to be adopted??
Generally 80 to 100 mm
Sir, it was a really nice lecturer.
I have few doubts sir. Please clear them.
1. Is use of lime is mandatory for achieving the desired gradation?
2. When we are preparing the mixes, you said first we have to take RAP in the mixer and followed by rejuvenator. If we add rejuvenator extra it will increase the total weight of the mix. Or we use rejuvenator as a replacement. If rejubenator is used as a replacement then what is replaced by rejuvenator.
3. Total weight of the mix is shown to be 1250 grams in the video. But as per Marshall mix Design method it should be 1200 grams. Clear me this sir.
the purpose of lime is not really to get the desired grading, it is used as anti-stripping agent. Otherwise cement is also a good filler.
rejuvenator is used in small quantity and it will not affect the mix much. It is used to reduce the viscosity of the aged binder
In Marshall mix design also we take 1200 g of aggregate and then add bitumen, same is here. The Marshall mold will accommodate around 1200 g and extra material is removed after final compaction.
Thank you sir for taking your valuable time in giving reply to my doubt.
I have a small question based on your reply given to me.
If lime is intended to add as an anti stripping agent then, my question is
Is use of anti stripping agents are compulsory when we are designing the RAP mixes. Because for normal mixes we generally don't bother about anti stripping agents.
What is the importance of anti stripping agents in the design of RAP mixes?
Clear me this doubt sir.
sir if you can explain how to calculate the rejuvenated amount in example and what is EAPA 2018
EAPA is European Asphalt Pavement Association.
The amount of rejuvenator is estimated by trial and error method
Sir, can u explain how pavement layers are behavior..
1. If DBM layer is constructed with VG40 and BC layer with CRMB.
2.VG 40 for both BC & DBM layers?
Which method is best for the performance point of view
There is no direct answer to this question. It would depend upon the maximum daily tempearture of the region. If you use harder grade of binder (like VG or CRMB) in a cold area, it will create problem of cracking and the pavement will fail prematurely. If you use them in hot region, then the pavement will last longer. Advantage of using CRMB (or PMB) in top layer is best achieved when traffic load is heavy (either in number or in magnitude). Otherwise VG 40 is good enough in both the layers.
Sir if we want to find out physical properties of RAP material, then the different test of aggregate should be done on extracted aggregate from RAP by aggregate extraction test???
If you extract binder from the RAP then all tests including grading can be done on aggregates,
@@SatishIITR is that mean sir if all test results are within required limits then we can use that RAP in road without extracting binder?? i.e. by measuring net bitumen percentage for mix after adding RAP?
@@thisisdpanchal Yes
Hi sir, BC mix design Marshall mix design with use of plastic waste me kitne proportion percentage me aggregates bitumen lena hai please tell 5%,6%,7%,8%,9%,10% plastic waste rahega and bitumen ke sath mix karna hai iska lab procedure bata dijiye
If you are working with dry process then find the OBC as per normal Marshall Method (without adding plastic), and then add plasic @ 8 % by weigth of bitumen. Prepare the mix and find all other properties. IRC SP 98 says no reduction in OBC be made due to addition of plastic.
If you are working with wet process, design the mixer to mix the palstic with bitumen and conduct all tests as per IRC 53
@@SatishIITR ok sir it's lab procedure all test conducted on lab Marshall mix design method
Sir, is dynamic shear rheometer (DSR) test mandatory to be performed if we are using RAP in HMA??
Not really if you can determine viscosity by other method
Sir..How we can find Bulk Specific gravity of RAP?....by finding bulk specific gravity of extracted aggregate from RAP?...or Finding Gmm of RAP??
There is no need to find Gmb of RAP. The bulk specific gravity of the mix (RAP + virgin material) is to be determined as we do in the normal mix design.
@@SatishIITR Yes sir, to find Gsb of total aggregate of mix in which we are using RAP.....we have to take specific gravity of RAP and its percentage....for that formula i am asking about sir...
very informative session sir. Please tell that how to perform CBR test on aggregates?
There is no mention of CBR in this video. CBR test on aggregates can be done for size smaller than 20 mm
@@SatishIITR Sir in CBR do we take the material passing 19mm sieve or the material passing 19mm sieve and retaining on 4.75 mm sieve?
It was a wonderful video Sir. Many doubts were cleared. Sir, MS-2 suggest to use one PG grade softer grade if RAP is in between 15-25%. Are we also considering one grade softer concept for Viscosity Grading too ? My reasoning is that VG-30 and VG-20 can of the same Performance Grade, that may not follow the current MS-2 criteria.
Please keep sharing such wonderful videos.
Sincerely
Ankit
I have given one table in this video which shows how to select the binder grade.
@@SatishIITR Okay Sir. Thank You.
Can you provide me the source of this table please
Sir, can u explain analysis of low volume roads as per irc sp 72 with a detailed example. Please sir
yes sir please make a video on this
Yes, I am working on this topic now. You will get it soon.
Another excellent lecture, sir. Thank you and expecting many more informative videos 🙏🏻🙏🏻
Thanks a lot, keep watching