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Rigid pavements, concrete pavements, design factors for rigid pavements, bottom up cracking and top down cracking in a concrete pavement, wheel base characteristics, cumulative fatigue damage analysis of a concrete pavement, modulus of subgrade reaction, effective K value, design traffic for bottom up cracking and for top down cracking, temperature gradient, stresses due to temperature gradient, curling of a slab, thickness of concrete pavement, dry lean concrete for base course, IRC: 58, 2015, Example of rigid pavement design, Excel sheet for stress calculation,
This video explains the step wise procedure of designing a rigid pavement as per IRC guidelines.
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5 сен 2024

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Комментарии : 107

@sagarsrsshah 7 месяцев назад

Thank you for the explanation and video, Professor. It was very clear.

@SatishIITR 7 месяцев назад

download from here docs.google.com/spreadsheets/d/1_OWE91cPj1toV-nHnH7DEw4fmF9tBnuo/edit?usp=drive_link&ouid=104340323223105810378&rtpof=true&sd=true

@lakshmisudha3038 Год назад

I wish you a Very Happy New year Sir, My Heartfelt Thanks professor sir for your wonderful lectures and your efforts in making videos. Sir most of the members are discussing the design of pavements but very few videos are discussing the analysis of flexible and rigid pavement. Sir most of the students need an analysis of flexible and rigid pavement, please do that videos, sir. Sir, please share the presentation content material with all your subscribers then it will be very helpful to all the people. Thanks, sir.

@SatishIITR Год назад

Noted.

@saurabhgarg8416 2 года назад

First of all thanks to you for making such wonderful effort ....All concepts have been combined and compiled in a pot ...very informative and crisp videos covering all concepts 1. Sir how they have come to average axle value of 2.35 2. While calculating stress value from equation k value to be used should Be effective one (285) or earlier one 50.3 3.Sir plz if u could clarify point of design traffic for lateral placement of axles is 25% only 4. How we have come to point of percentage of various axles

@SatishIITR 2 года назад

Thanks for your comments. My reply is given here. 1. It is based on axle load spectrum data observed on Indian Highways over the time. Therefore it is an assumption only. 2. k value should be effective one. 3. The edge flexural stress caused by the axle loads for BUC is the maximum when the tire imprint of the outer wheel touches the longitudinal edge, and even a small distance of 15 cm from the pavement edge makes lot of changes in the stress. The typical lateral distribution of wheel paths of commercial vehicles observed on Indian Highways indicate that very few tire imprints of moving wheels are tangential to the longitudinal edge. Therefore this value is taken 25% (1 out of 4). Agarin a default value. 4. I think this point relates to Axle Load Spectrum data shown in one table. For each axle load class, there are ni vehicles. this ni is called the frequency (number of vehicles observed in axle load group i. Then percent frequency is ni divided by N (total number of vehicles weighed. I hope it is clear.

@ayushraj7945 2 года назад

Thank you sir.... For explaining it in simple way. Sir, any thought on making video on US Corps of Engineers Airport Pavement? Design?

@SatishIITR 2 года назад

Not Really. But can do if you help me.

@sumandubey2807 2 месяца назад

Question-- What is critical stress condition in rigid pavement according to IRC 58: 2015? Then what should be the answer pls reply and if you explain in video than please provide time stamp

@SatishIITR 2 месяца назад

The flexural stress due to the simultaneous application of traffic loads and temperature differentials between the top and bottom fibres of a concrete slab is considered critical for design of pavement thickness. It is explained at time stamp 17.08. Watch it. Next time, be a bit polite when you ask a question.

@Mahesh-xx2zv 2 года назад

Greetings Professor! Very nice video on rigid pavement design example. I would recommend your videos. Could you please explain in detail how to obtain the "Expected repetitions (ni)" and "Flexural stress" in the given table for BUC/TDC. Thank you in advance!

@SatishIITR 2 года назад

Flexural stress is obtained through a set of equations (or charts) which are built in the Excel sheet provided with IRC code. Expected (or predicted) number of Repetitions for a load group is obtained from traffic count data. ni is the number of repetitions of a load group i for design period (6 hour day or 6 hour night). I hope it clarifies your doubt. No? Write again.

@Mahesh-xx2zv 2 года назад

@@SatishIITR Thank you very much Professor. Got it.

@SatishIITR 2 года назад

@SAIMADHU KALLYPALLI SVNIT for BUC, it from 10 AM to 4.00 PM and for TDC, it is from 12 midnight to 6 AM.

@milindjamble7987 2 года назад

Sir, 1. No. Of avg axles to be calculated from axle load survey and if value comes

@SatishIITR 2 года назад

1. Yes, IRC code is silent over it and we should take the actual value obtained from the filed data 2. Yes, I thought of telling this in my video but avoided to avoid any conflict between 37 and 58. The charts given in IRC 58 are up to CBR of 7 % only. Beyond this u need to follow IRC 37 procedure. 3. agree 4. The excel sheet used to calculate fatigue damage has this option of choosing tied or untied shoulder and the analysis will change accordingly. Thanks for your comments.

@harishgowda5485 2 года назад

Respected sir I am working Asst engineer in govt sector pl make a complete design construction for white topping pavement using irc 58 which is will be more useful for us Sir thanks a lot I have learnt lot of basic concepts which helped me in designing of various roads in Karnataka

@harishgowda5485 2 года назад

It’s irc sp 76

@SatishIITR 2 года назад

will do soon. Thanks. Please ask your students also to watch these videos.

@SatishIITR 2 года назад

Yes, It is IRC:SP 76 for overlay design.

@sokhengphai506 5 месяцев назад

Dear Sir, first of all I would to express my sincere thanks for the important and well explained video on pavement design, one thing that I would like to get your advice, is how to obtain the excel file. It is very important to learn.

@SatishIITR 5 месяцев назад

You can download from this link. docs.google.com/spreadsheets/d/1_OWE91cPj1toV-nHnH7DEw4fmF9tBnuo/edit?usp=drive_link&ouid=104340323223105810378&rtpof=true&sd=true

@sokhengphai506 4 месяца назад

@@SatishIITR Dear Sir, many thanks indeed for your kindness, may God bless you and your family as always 😍

@SatishIITR 4 месяца назад

@@sokhengphai506 Thank you so much

@Fayazahamed65 2 года назад

Hi Sir, this video is very useful, can you please share the excel sheet

@SatishIITR 2 года назад

sure

@gaurangjoshi5976 Год назад

Superb!!!

@SatishIITR Год назад

Thanks a lot

@constructionpediajobopenin2097 Год назад

dear sir kindly prepare a video on overloading analysis for both Rigid and flexible pavement

@SatishIITR Год назад

It is already covered in three videos - Design of Flexible Pavements, Design of Rigid Pavements and Estimation of VDF. Please watch.

@chennareddyindla2349 Год назад

Great sir.

@SatishIITR Год назад

Thanks, share with your friends also

@omkarpowar3565 2 года назад

Thank you sir🙏

@SatishIITR 2 года назад

Welcome. please share the link with your friends also

@RAJUBESU 2 года назад

Sir thank you for this video: What is the minimum thickness of RCC pavement & what is the maximum distance of expansion joint & transverse joint we may provided ?

@SatishIITR 2 года назад

Sorry, I do not have much knowledge of RCC pavements. But if reinforcement is being provided in a jointed pavament to control cracking then the pavement should be designed as per IRC 58 only.

@rupalithanage9008 2 года назад

The video is really helpful sir. Can you please make a video on how to find design wheel or axel load using Excel sheet.

@SatishIITR 2 года назад

The question is not clear, I explained the design through Excel sheets only, The excel sheet gives you design traffic for bottom up and top down cracking analysis also, which I explained in slides. Please let me know if you need anything else,

@shashikumarkomatireddy2828 2 года назад

Sir can u share excel sheet in description

@aydnaydin9109 8 месяцев назад

what are the latest concrete pavement design procedures?

@SatishIITR 8 месяцев назад

Not many.

@shanil3001 2 года назад

IRC:58-2015 charts/equations are valid for 3.5×4.5 m slabs only. Extension by 0.5-0.6 m is permitted for outer slab. For 9m paved width, if I want to provide 4.5×4.5 m slabs then how to design? New FEM analysis?

@SatishIITR 2 года назад

Yes, You will have to carry out FEM analysis for this size of slab. Their behavior was not studied during development of IRC:58

@shanil3001 2 года назад

Thank you for the clarification!!

@milindjamble7987 2 года назад

Sir Considering the saving of natural resource, can the rigid pavement be constructed over existing flexible pavement just by scarifying bitumen layer and laying gsb, dlc and pqc

@SatishIITR 2 года назад

Yes, it should be possible. White topping is permitted by IRC also. But what you asked is different from white topping. care should be taken based on the site condition. After scarifying black layer, the existing granular base may also act GSB for new pavement. Check for grading.

@sushantgupta7823 Год назад

Sir thanks for information. Pls share the excel sheet. Thanks

@SatishIITR Год назад

you can download from the following link docs.google.com/spreadsheets/d/1Qe7RAyZ4r3SdIRPDdfOtPXRwB9HWcstK/edit?usp=share_link&ouid=118387083302780581255&rtpof=true&sd=true

@sushantgupta7823 Год назад

@@SatishIITR Sir thanks for sharing the excel sheet.

@deepakrajput-yq5jo 2 года назад

Sir how to calculate of modulus kf subgrade reaction of combinef founfation please explain

@SatishIITR 2 года назад

It is taken from Table given in IRC code.

@khiladikumar491 2 года назад

very nice sir ! Sir, can you tell how to find stress (kg/cm2) from charts

@SatishIITR 2 года назад

getting stresses from chart will require selection of an appropriate chart for the given design parameters. Nothing else.

@rohitraghuwanshi9439 2 года назад

Thanku sir

@SatishIITR 2 года назад

Welcome. please share the link with your friends also

@saurabhsingh219 2 года назад

Why in BUC ..we don't consider tridem axle calculations?

@SatishIITR 2 года назад

spacing between individual axles fir tandem and tridem axles varies from 1.3 m to 1.4 m and there is practically no difference in stresses for axle spacing between 1.3 m and 1.4 m. IRC 58 considers axle spacing of 1.3 m for calculation of stresses. Tridem and tandem axles are assumed to cause same stress in the slab during downward curling (BUC).

@imses3660 2 года назад

Sir, can the PQC thickness be reduced, incase in we are able to achieve higher flexural strength due to use of synthetic macro-micro fibres in the same concrete mix design. For example M40 grade concrete the 90 days flexural strength is 4.95MPa. With addition of fibres and admixture the flexural strength at 90 days has increase to 6 MPA. So while designing the pavement can we take this value.

@SatishIITR 2 года назад

Yes we can.

@vishwanathbiradar7305 7 месяцев назад

Thank you sir, can I get Excel files

@SatishIITR 7 месяцев назад

Will see if I have it

@dhruvkothari4308 2 года назад

Thank you, sir. My question is Which cracking is more critical BUC or TDC?

@SatishIITR 2 года назад

BUC is more critical as it is not visible

@maheshchaudhari3987 2 года назад

What should be the max thickness of Topmost layer (concrete slab),,

@SatishIITR 2 года назад

IRC does not specify any upper limit as it will depend upon traffic volume and soil condition. Normally 30 - 32 cm thick slab is enough even for heavy loads. But it is to be designed,

@maheshchaudhari3987 Год назад

Should that thick slab be above previous roads ground level,,?

@_keerthanaanand 10 месяцев назад

Sir Step 2 How can we get flexural strength?

@SatishIITR 10 месяцев назад

Flexural strength of concrete is alway determined by testing of beams in bending

@rajamistry1008 Год назад

Sir, I have a doubt. If a pavement is bounded with DLC and I provided a trial thickness that failed the cumulative fatigure damage criteria but the combined stiffness is more than the design stiffness requirement then what to do?

@SatishIITR Год назад

IRC 58 does not talk of monolithic pavements. If you change any geometry or conditions of the pavement structure, then the stress equations given in the code will not be applicable.

@punithhg3161 Год назад

Sir, I have a question that in temperature differential table except Assam none of the north east states are mentioned. Is there any reason.

@SatishIITR Год назад

All North Eastern states are to be taken in the zone of Assam only,

@anandachipadi2136 6 месяцев назад

Sir for intermediate lane (5.5m) is it applicable Sir

@SatishIITR 6 месяцев назад

yes. take the size of the slab accordingly

@mdsamiullah473 2 года назад

Thankyou sir

@SatishIITR 2 года назад

Welcome. please share the link with your friends also.

@devanjandeovrat1437 2 года назад

Sir how do we calcualte k value from effective CBR if effective CBR is 8%

@SatishIITR 2 года назад

Table is given in IRC code to obtain k value for a given CBR. This table is shown in this video also.

@achyutdas7624 Год назад

Sir Excel sheet calculations are not visible,

@SatishIITR Год назад

Check again, there must be some network issue at your end. The video is clear. You may try with Hindi version of this video if the problem persists.

@vivekjha2331 2 года назад

Sir, can you please share the PPT

@SatishIITR 2 года назад

I have not considered it so far.

@vivekjha2331 2 года назад

@@SatishIITR Please consider it, sir, if possible through a Google Drive link.

@praveenkumarp5701 Год назад

@@SatishIITR Please consider sharing of the PPT sir..

@silentknight2930 2 месяца назад

R u selling this Excel sheet?

@SatishIITR 2 месяца назад

No, I am giving it for free. You can download from here. docs.google.com/spreadsheets/d/1_OWE91cPj1toV-nHnH7DEw4fmF9tBnuo/edit?usp=drive_link&ouid=104340323223105810378&rtpof=true&sd=true

@silentknight2930 2 месяца назад

@@SatishIITR thanks for sharing

@deepakrajput-yq5jo Год назад

Sir please share the excel sheet

@SatishIITR Год назад

Ok, on your email only

@deepakrajput-yq5jo Год назад

@@SatishIITR Please sir to all crust design of rigid & flexible pavement

@SatishIITR Год назад

@@deepakrajput-yq5jo will see if I have in my folder

@deepakrajput-yq5jo Год назад

@@SatishIITR sir then what happened of crust design, did u get the same

@ShahbazKhan-oh2td 2 года назад

Sir, can you please share ppt and Excel file ?

@SatishIITR 2 года назад

Excel files come with IRC code in a CD. I took help of one of my colleagues to get than part of video.

@deepakrajput-yq5jo 2 года назад

285 mpa/m kaise aaya sir wahi jana tha bss please help.me.sir

@SatishIITR 2 года назад

For k value of CBR 50.3 MPa/m and for Subbase of 150 mm and DLC base of 150 mm, you can find k value from the tables given in IRC 58

@jacobgbegas711 2 года назад

how could I access the excel??

@SatishIITR 2 года назад

They come with code.

@madhurighodke7060 Год назад

Irc me Jo hai wo bataya sir....khuch bhi explain nahi Kiya irc chod ke

@SatishIITR Год назад

we follow IRC codes in letter and spirit and many of our students find it difficult to understand the procedure given in IRC code. This code is not understood correctly even by tutors. Thanks for your comment.

@nagmaniadhikari3391 2 года назад

sir please share excel sheet

@SatishIITR 2 года назад

The part of the video where calculations using excel sheet are shown was made with the help of my scientist colleague in CRRI. I will see if I have these excel sheets in my system and share with you.

@nagmaniadhikari3391 2 года назад

@@SatishIITR please sir share excel

@deepakrajput-yq5jo 2 года назад

50.3 mpa/m kaise aaya sir

@SatishIITR 2 года назад

For Effective CBR of 8 percent k value can be read from the table given in IRC 58. Interpolate the values linearly.