Design of Flexible Pavement based on IRC 37, 2018 in Hindi, Pavement design for highways

[@gkv5682]

Sir Kasam se aapke video dekh kar maza aa gaya .

[@SatishIITR]

Thanks a ton.

[@sawarmalsharma7090]

Sir, in epR is more than epT in that case will we consider epR to allowable tensile strain ?

[@SatishIITR]

Yes. Higher of the two should be taken as critical strain.

[@stutipandey608]

A very good initiative to understand the basics of Pavement design.......👌👍.Sir, can we request you to provide slides or PPTs of these.

[@SatishIITR]

Making slides yourself is always helpful. You learn many new things. Thanks

[@betu2010kiit]

Very helpful to understand the concepts in Hindi. Good initiative sir.

[@SatishIITR]

Thanks. Please share with others also.

[@civilshort2788]

It is a great video sir, Thank you I have doubt that, in LCR mtd. structural layer coff. (SP59) equation is for untreated base, but if it is CTSB then use same equation or equation will change??

[@SatishIITR]

IRC SP 59 is for reinforced pavements. Why should we use CTSB in a geogrid reinforced pavements? I mean why to strenthen the pavement twice?

[@AmitKumar-im5hm]

thank you sir your video is very helpful for civil Engineer🙏🙏🙏

[@SatishIITR]

Most welcome, Keep watching. There are many more on my channel.

[@CHANDRASHEKHAR-od5if]

Nice video

[@parasmanisindhia4493]

Sir please tell me what? Design effective CBR. is 6%, and sub-graded CBR is 8% and embankment CBR is 3.5%. But when we checked the CBR of the embankment at one location on the site, the CBR value is 0%. And Boro subgrade soil CBR is 20%. So without removing that soil We can create a 500mm subgrade, or we will remove soil from the embankment by digging or creating an embankment and subgrade.

[@SatishIITR]

zero CBR means pure clay with high compressibility. Check the engineering properties of embankment soil as per MoRTH specifications. There is no soil on this earth which can have a CBR of 20%, unless it is mixed with aggregates. Even the coarse sand will have CBR around 8-9 percent. I have doubt on this value also.

[@santoshkumarsingh8309]

Sir ,is installation of glass -grid (Sami) on DBM top layer is correct?

[@SatishIITR]

Use of glass grid will reduce the reflection cracking. It can be used.

[@anuragverma7987]

Good evening sir🙏 At 23.35 why did you put the limited modulus value (100MPa) in elastic modulus of embankment soil for find effective cbr. Can i put it in modulus of borrow material or what will happen when I put limited modulus value in borrow material

[@SatishIITR]

IRC 37 suggests that for the pupose of design, the resilient modulus be restricted to 100 MPa. If borrow material has higher CBR and you take this CBR for the design, then your pavement will be under designed.

[@anuragverma7987]

Thank you sir Is it mean that we have to put limited modulus value in those material which have low cbr compare to other or always consider cbr of emb? Sir one more thing, Suppose if the modulus value is less than 100 or equal to 100mpa in this cond. Should I use cbr of embankment or cbr of borrow material or above process apply again.

[@SatishIITR]

@@anuragverma7987 You will have to determine the effective CBR whenever the consruction is in embankment

[@PiyushJaangid]

Sir, Which formula or procedure is there in backend of IITPAVE, so that we can better understand how IITPAVE is calculating Et, Ev?

[@SatishIITR]

IIT software is based on Genetic algorithm and linear elastic theory.

[@PiyushJaangid]

@@SatishIITR Sir, thank you for your reply. I want to know the formulae used behind that software so that what IITPAVE calculates, I can calculated manually like we do in normal calculators.

[@SatishIITR]

@@PiyushJaangid No, that cannot be done

[@PiyushJaangid]

@@SatishIITR Sir, In DMRB(UK) codes for pavement design, the calculation can be done manually, So can we at least know how does IITPAVE calculates stress strain and deflection at different points of pavement. So that we can reverify our design manually?

[@SatishIITR]

@@PiyushJaangid I have no idea. You should write to IIT Kharagpur

[@ProfAnkitSharma]

In Hindi, it is even better to be understood. Great initiative Sir.

[@SatishIITR]

Thanks a lot

[@tarungupta6235]

Thanq so much soo much for such a informative lectures. Sir, as per irc:37-2018, clause. 12.3 of page 35 metioned : For (bituminous + granular case) pavement case, for design traffic of 5, 10 and 20 msa, the Va , Vbe and ‘C” factor values considered are 4.5%, 10.5% and 1.12. And In CTSB & CTB pavement case, we use Va of 3.5% and Vbe of 11.5% and fatigue equation ‘C’ factor of 2.35. But in video it is mentioned C = 2.35. Please sir clear this doubt!!!

[@SatishIITR]

Section 12.3 gives details of dafault values used to generate the catalogue. You should not use these catalogue in your design. Take guidance from the text given on Page 31 of the code and design the pavement using IITPAVE.

[@keshavsikhwal866]

Sir, can you explain the reason behind, why resilient modulus of subgrade is limited to 100 mpa by IRC suppose if i choose more than it what changes we will see on strains ( tensile and verticle) in IIT PAVE

[@SatishIITR]

It is because there is not much advantage of having subgrade of very high CBR value, particularly above 10 %. The change in pavement thickness needed to carry a given traffic load is not directly proportional to the change in CBR value of the subgrade soil. For example, a one-unit change in CBR from 5 to 4 requires a greater increase in pavement thickness than does a one-unit change in CBR from 10 to 9.

[@keshavsikhwal866]

@@SatishIITR thankyou, 🙏

[@keshavsikhwal866]

sir, but you said that thickness will not change so much after 10% of CBR , so why we are not leaving this thing on IIT PAVE , software will manage it , it will not show large variation in stresses and strains but why we prohibited the values more than 100 MPa. so finally i am just asking that why we can not use this 112Mpa value even i have already compacted subgrade to such extent ? Is it a kind of factor of safety ? please explain why code is hiding actual value and limited to 100 Mpa 🙏

[@SatishIITR]

@@keshavsikhwal866 I dont think there is any soil in the country which can give you such a high Modulus. Software is just a tool created by human. Cannot leave everything on machine. Checks and balances are always needed.

[@awadheshkumarmaurya2818]

i have a problem sir when designing flexible pavement, if sub base material is GSB, and base course is cemented WMM. When calculating strain by IIT pave, what should take of Resilent Modules of second layer CTB (stablised with 3% cement WMM). It should be calculated by seperate layer or with granular subbase layer by using IRC equation 7.2 as considering both thickness as single Mr or seperating as for resilent modules of base layer, For Mrsupport , the value should be taken Mr of Granular in place of supporting earth/grade. whey differs Mr value of CTSB and CTB.

[@SatishIITR]

so many points jumbled in one question. Resilient modulus of CTB layer is taken 1000 times UCS. In your case subbase is untreated granular layer and therefore it should be treated as a separate layer. For calculating Mr value of GSB use Equation 7.1 with Msupport for subgrade soil.

[@soninirav3114]

Hello sir In crack relief layer,we have used SAMI instead of dbm of 100 mm..and generally thickness of Sami is 25 mm and it is not considered as structural layer My question is at which criteria we are using Sami, instead of 100 mm dbm as crack relief layer Thank you sir for this vedio

[@SatishIITR]

DBM is not not used as a SAMI layer. The purpose of SAMI is to prevent the reflection of cracks to DBM and BC layers due to cracking of CTB layer. DBM will not be able to meet this requirement. Instead a 100 mm thick layer of aggregates is used as a crack relief layer if you want to avoid use of SAMI.

[@anil1916]

How we get radius of contact area 150.8 mm , please guide , used for evaluation effective CBR

[@SatishIITR]

Calculate it using the equation, pressure = load/area

[@UniqueJD]

Thank you very much sir for your very informative session…. I think sir Slide no 33 (time: 36:42) me notes no. 2 me mistake he…please correct me if I wrong.

[@SatishIITR]

Yes, you are right. It should be read at top of the subgrade layer. Thanks. Please circulate the link in your groups also.

[@manupartapsingh8491]

Sir the whole video was fantastic , just the value of c*0.5161 is incorrect, it is coming out to be 1.628 not 1.2128 , although final answer 150 micro strain is correct

[@SatishIITR]

Thanks

[@ashishanand5536]

Thanks Sir ,wonderful video

[@SatishIITR]

Glad to see that you liked it

[@abhinavkumar4037]

sir thank you for this video , i have some confusion please solve this problem how to calculate Average No of axles per commercial vehicle, B

[@SatishIITR]

You need to have classified traffic volume count of commercial vehicles (number of vehicles and the number of their axles) to get this value of B (taken 2.30 in the example problem. It is the total number of axles divided by the total number of CV.

[@abhinavkumar4037]

@@SatishIITR thank you sir

[@SEQualityAssuranceSundargarh]

Thank you sir. The video is very much helpful but sir how to install iitpave software???

[@SatishIITR]

I have explained it in my English version. Please watch it.

[@monjitgogoi8129]

First of all thank you very much sir for the explanations and the video..sir my doubt is from the software output file, why we are considering the values of epT as marked by you and why not the value just below your marked one (as both the values are same). For epZ it is clear that the marked one has the higher value.

[@SatishIITR]

Choose the higher of the two values, one below the load and another one at radial distance of tire radius

[@NitishKumar-lm8vp]

Thank you sir Very informative video sir if possible please make videos on M.tech Transportation covering all the Topics

[@SatishIITR]

There are more than 200 videos on my channel and all of them are on different topics of Transportation engineering. Watch the playlist once. You will find many of your interest.

[@abhisaitejareddy2443]

Good evening sir, I have one doubt.. For Geogrid design purposes, if client was given both LCR value and MIF values. Which one is consider for design purposes and why?

[@SatishIITR]

The LCR is used to determine modified value of Modulus of reinforced base or reinforced subase (or both) layers. If modified values are already known then there is no use of LCR and you can run the IITPAVE to design the pavement with modified values of modulii of reinforced layers. I hope you got the answer to your question.

[@pramodkumar5530]

Thank U Sir. This video is much informative and helpful. 🙏🙏

[@SatishIITR]

Glad to know it. Please circulate the link in your groups also.

[@ioyrrty]

Sir aap logo ko itni deep understanding kaisi hoti hai kuch tips dijiye

[@SatishIITR]

Haha, It all comes by reading, reading and reading. Aap bhi seekh sakte hai, koi mushkil nahi hai. You can be better than me if you make the habit of reading.

[@ioyrrty]

@@SatishIITR aap bol rahe hai na sir mushkil nahi hai na par transport read Karo to RCC gayab ho jati hai RCC dhyan do to survey bhul jata hu par aap kha rahe reading k liye to reading aur frequent karunga Tq for advice sir🙏

[@SatishIITR]

concentrate on the subject. ek topic ko kam se kam 2 bar padho, nahi bhulonge. May God bless you.@@ioyrrty

[@ioyrrty]

@@SatishIITR tq sir

[@arijitbanerji2162]

Good afternoon sir, The video is very much clear to understand. I have a doubt that in terms of say 50 MSA, if I want to apply a cyclic load of 80kN to a loading area in FE software, then how much repetitions of loading cycles I have to apply?

[@SatishIITR]

Sorry Arijit, I have no idea of FE analysis

[@arijitbanerji2162]

@@SatishIITR no issues sir. I just want to get clarified that pavement thickness for design of 5O msa represent that a pavement can sustain 50x10^6 repetition of 80kN load?

[@SatishIITR]

@@arijitbanerji2162 Yes, it is correct.

[@spiritual2605]

Good evening sir ...Are you have AASHTOWare M.E. design software?

[@SatishIITR]

No, sorry. I do not have this software

[@spiritual2605]

@@SatishIITR okay sir

[@abhinayasaitejareddypalem7423]

Hello sir, I have one doubt... If we provide the Geo-synthetic between the Subgrade and GSB layer. as per IRC: SP-59, Whether we have to calculate the modified resilent modulus of subgrade layer or modified resilent modulus of Sub base layer?

[@SatishIITR]

Providing a layer of geosynthetic at top of subgrade will improve the Mr of subgrade only and not of the subbase.

[@abhinayasaitejareddypalem7423]

@@SatishIITR thanks for explaining sir.. Sir, Is there any method or formula for calculation, I don't find any where how to calculate effective modulus of Subgrade with Geotextile.. If there any method please explain sir...

[@SatishIITR]

@@abhinayasaitejareddypalem7423 No, you have to get it experimentally, in my opinion

[@abhinayasaitejareddypalem7423]

@@SatishIITR thanks for explaining sir....

[@ShubhamSharma-rd2xp]

Great initiative sir very greatful 🙏 to you kindly share how to prepare dpr of full project

[@SatishIITR]

DPR is a very wide subject and I do not intend to work on it at present.

[@happening2023]

Sir, lets say we conducted 30 CBR test across the span of our project i,e: for SG and Emb (borrow material comes from different area of hill cut). In this case, should we take 90th percentile CBR of SG and 90th percentile CBR of Emb to calculate effective CBR?

[@SatishIITR]

attempt should be to have soil in the top 500 mm of Embankment with uniform CBR value. If not possible, then 90 percentile is a good option although it is not mentioned in any code.

[@sathishbabu9090]

please make a video on marshall mix design

[@SatishIITR]

THere are two videos on Marshall Method of Mix design. watch them In Hindi kzbin.info/www/bejne/sH7KfYOIo9x3d80 In English kzbin.info/www/bejne/fWnLo5aer7Cbabc

[@harishgowda5485]

Sir pl make an video regarding design of white topping rigid pavement.

[@SatishIITR]

Yes, it is almost ready. will upload soon

[@atulkumarpandey2570]

Sir, Good morning! Please could you share the link of IITpave software for download

[@SatishIITR]

download it from here drive.google.com/file/d/1G8XNwyKSHpiGYZZbi-QFYCticKHi0c8V/view?usp=share_link

[@atulkumarpandey2570]

@@SatishIITR Si ji Thank you very much for your support.

[@AbhishekTiwari-yq9nv]

Thank you sir for such an informative video.

[@SatishIITR]

You are welcome. Keep watching.

[@suryakantbiradar8675]

VERY NICE EXPLANATION

[@SatishIITR]

Thanks a lot. Keep watching

[@girisujeet7866]

Respected Sir please provide Effective CBR calculation with example

[@SatishIITR]

OK, noted

[@Soniya-1s3]

this software available of free version for civil engineering student how install of this sofware

[@SatishIITR]

Isko install karne ki jarurat nahi hai. Download Java in your system and then run the program

[@shubhamkatyan6808]

Hello sir, please make video on IRC - Sp-125 -2019 to help us understand deeply..

[@SatishIITR]

OK. Thanks

[@dharmendramahto2228]

Sir please rigid pavement ka is code bhi bataye

[@SatishIITR]

Rigid pavement Hindi and English dono language me upload kiya hua hai. IRC 58

[@vivekchaturvedi9872]

Very Nice Sir , Thank you Sir

[@SatishIITR]

Most welcome. Keep watching

[@ranjeetkumar-cz9vs]

Very nice and learning video sir thank you so much

[@SatishIITR]

Keep watching, there are many other good videos on my channel. See the playlist.

[@MrNiteesh]

Sir can you share your presentation?

[@SatishIITR]

You will have more satisfaction and understanding if u prepare it yourself.

[@shobhitvajpeyee8019]

Sir, how to find the remaining life of pavement please answer

[@SatishIITR]

If you know the design traffic and and the time period between the present day and the date of opening to the traffic, you can find how much repetitions of standard axle loads have already gone on the pavement and design life minus these axle load repetitions will be the remaining life of the pavement.

[@muhammadaqeeldar6044]

how to get the software

[@SatishIITR]

It must be available freely on internet. Try

[@yasawantsinghyadav2406]

Sir ctb ctsb ke design Hindi my bta dijiye plz

[@SatishIITR]

OK, will do soon. Semester classes chal rahi hai. Do not get much time to work on videos, but will do soon.

[@yasawantsinghyadav2406]

Sir ap ke lecture se sare dout katm ho jate mere . Or base mil jaata working ka

[@HARSHITEDITZ-e8n]

Sir, please upload parking study related videos.

[@SatishIITR]

Ok, will make on this topic also soon.

[@HARSHITEDITZ-e8n]

@@SatishIITR Thankyou so much sir.

[@er.sayanpal]

Sir how to get iit paved

[@SatishIITR]

It comes with IRC code. Downloaded files are not working

[@er.sayanpal]

@@SatishIITR sir its paid Irc 37

[@er.sayanpal]

sir makes a video on maximum and min temp in Flexible pavement used lestest formula based

[@SatishIITR]

@@er.sayanpal OK

[@SatishIITR]

@@er.sayanpal Yes, You can buy IRC 37 online.

[@kumodkumar1304]

Hello sir Can you provide me Excel sheet of FWD for CC pavement?

[@SatishIITR]

There are no such excle sheets for FWD. The software comes with IRC code only.

[@akashmondal2082]

Sir how can I download IITpave software

[@SatishIITR]

It comes with IRC code

[@mayamanishparte9993]

Thank you very much sir ji

[@SatishIITR]

Most welcome, keep watching

[@souravgoswami4994]

Sir what is SMA ??

[@SatishIITR]

Stone matrix asphalt.

[@SatishIITR]

Watch my video on this topic for details

[@samuctrebla3221]

Hi, This Pavement design method is very similar to the French Pavement Design (FPD), especially with the influence of the reliability embedded in the material performance models. Question : where is the empirical part of this Mechanistic-Empirical method ? Unlike the FPD, I see no calibration coefficients. Thanks

[@SatishIITR]

This method was developed by IIT Kharagpur under a research scheme and all calibration parameters are embeded in the design software. The concept of Reliability is taken from AASHTO method.

[@yasawantsinghyadav2406]

Dbm ki design ms2 ke aco. Hindi my bta dijiye plz

[@SatishIITR]

DBM की डिज़ाइन कोई अलग नहीं है। इसे भी मार्शल मेथड से ही करते है।

[@soninirav3114]

Hello sir In fatigue model We have 2 equation for 80-90% reliability The only difference is coefficient 1.6064 and 0.5161 Supposed we got the value as 100 for other parts Than Nf =160.64(80% reliability) Nf=51.61(90%reliability) How it is possible that at higher reliability, fatigue life is reduced

[@SatishIITR]

Reliability is a statistical term which gives you the level of confidence in your prediction. Higher is the reliability, lesser will be the chance of going wrong in your prediction. When you choose 80 percent reliability, your model will predict the fatigue life that is likely to go wrong (on higher side) with a probability of 20 %. when you increase the reliability to 90% then practically you reduce the margin of error to 10 % only. I hope it is clear now.

[@soninirav3114]

@@SatishIITR yes sir Thank you

[@spiritual2605]

Hi sir, Can you share IITPAVE software link

[@SatishIITR]

Here it is drive.google.com/file/d/1G8XNwyKSHpiGYZZbi-QFYCticKHi0c8V/view?usp=sharing

[@spiritual2605]

This is not accessible sir ....

[@SatishIITR]

@@spiritual2605 The link might have expired as you attempted after long time.

[@spiritual2605]

@@SatishIITR what is the solution Sir ?

[@manishshukla2429]

Great 👍👍 thanks sir

[@SatishIITR]

Most welcome, please share with your friends also.

[@ashutoshkumartiwari1209]

thank u so much sir🙏🙏

[@SatishIITR]

Most welcome, Please circulate the link in your groups also.

[@bablivlog5363]

Excellent

[@SatishIITR]

Thanks

[@yasawantsinghyadav2406]

Great sir

[@SatishIITR]

Thanks, Please share the link with your friends also.

[@tarungupta6235]

thanqq soo much sir. pl sir send the ppt.

[@SatishIITR]

Thanks for watching. Please circulate the link in your groups also.

[@ajaygola2992]

best way

[@SatishIITR]

Thank you so much. Keep watching

[@abhishekchaudhary4497]

thanks sir

[@SatishIITR]

Most welcome, Please circulate the link in your groups also.

[@dculpin2ustudio801]

Sir 🙏

[@SatishIITR]

Thanks for liking, Share the link with others also

[@yasawantsinghyadav2406]

All theory ms 2

[@SatishIITR]

??? समझ नहीं आया

[@saikumarnandhigama842]

😳