How to Calculate Cement, Sand and Aggregates In Concrete Slab | Easy Step-by-Step Quantity Calcs

In this video, we will show you how to calculate the quantity of materials needed to cast a concrete slab. This simple and easy-to-follow tutorial will help you estimate the amount of cement, sand, and aggregates you will need for your project. Whether you're a student, a DIY enthusiast or a professional contractor, this video is a must-watch for anyone looking to improve their concrete casting skills.
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[@Nkporandokaka]

Please we need more video like this you are doing amazing job.

[@civilworks826]

Thanks 👍

[@victoremesim]

I love your presentation. Even a blind person could follow and understand what you've said and what exactly to do. Thanks

[@civilworks826]

Glad you liked the video ☺️👍

[@Peace-nh9fs]

Perfect ur calculations where perfect

[@civilworks826]

Thanks!

[@dayosuara8295]

Great work chief

[@amazinggrace5300]

Fantastic video! Gave me the needed information in an unforgettable way. Kudos 👏

[@civilworks826]

Glad you liked the video.

[@kingsleyaddo1917]

Thank u sir, am an electrical engineer but this video has help me understand my civil knowledge. Thank you

[@civilworks826]

You're welcome!

[@boluwatifeadekanle8121]

This is excellent I understood perfectly well

[@civilworks826]

Glad you enjoyed the video! Please subscribe for more. Thanks

[@enod9746]

Oga, you need to develop this channel. The info is priceless.

[@civilworks826]

Thanks 👍. I have other videos in the pipeline. Watch this space!

[@evincentevinpal142]

Very help full video thank you

[@civilworks826]

Glad you found the video helpful

[@davidbusari]

Your lecture is so great

[@civilworks826]

Thanks a lot

[@evelynjifon9827]

Thank you sir. You know your trade.🙏🙏🙏🙏

[@civilworks826]

Thank you 👍

[@ExeNguMalado]

This was very helpful thank you

[@civilworks826]

Glad you found it helpful

[@user-pq1vg7vj9b]

Perfect in cacuation were perfect😮

[@civilworks826]

Thanks!

[@user-ov9lg8ky9b]

Very amazing video, pls can you do a video on structural steel design for a watch tower with a shelter house on top

[@civilworks826]

I'll see what I can do. Thanks for watching!

[@joyacollinsngem8623]

Your videos are great

[@civilworks826]

Thanks

[@muslimgarbaahmad9377]

Very simple to understand

[@civilworks826]

Thanks

[@davidbusari]

I want more of your lecture

[@emmanueljones6002]

lol, make another video for the lay man, tell them how many bags of cement, how many head pans of sand and gravel is needed to make a slab of dpc. That will make more sense to a lay man. Thanks

[@civilworks826]

Hmmm...you have a point there. I'll include that in one of my next videos. 👍

[@xtanlee__]

Wonderful 💯

[@civilworks826]

Thanks

[@olayidemosesogunleye6506]

Good presentation. Can u make presentations for other aspects of building construction like plastering, roofing etc

[@civilworks826]

Thanks for the compliment. And for the suggestion, I'll look into it.

[@ambroseoyanga7018]

Thanks so much brother

[@civilworks826]

You're welcome 👍

[@DelightfulHidingCat-tb4fp]

Thanks for the video.. ❤️👍
How much cubic of concrete mix would I require for slab.. W 2.4m x L 5.8m x 0.1 m

[@AdebolaOnakoya]

thank you for this video , if we have granite instead of gravel the density we change likewise the volume of granite , can you throw more light on this

[@civilworks826]

Yes. Depending on the material density, the volume will be adjusted accordingly. This is because the mix design is based on the weight of the aggregates. For example, using granite instead of gravel (they're quite similar though) can give a different concrete strength even if the same mix ratio is used

[@BismarkHoffmann]

So interesting

[@civilworks826]

Thanks

[@rev.wukolokollie8675]

Thanks for the presentation. A question. If Iam using a wheel barrow to measure my mix as in this calculation (1:2:4). Will I be right to say 1 bag of cement is to 2 wheel barrow of sand and 4 wheel barrow of aggregates?

[@civilworks826]

No. You would be using 1 barrow (not bag) of cement. The unit of measurement must be consistent

[@elizabethmaswabi4757]

what you can do in this situation is, pour the cement in the wheelbarrow and mark the level, that should be the level you will use to measure the rest of the materials.

[@civilworks826]

Exactly!

[@ambroseoyanga7018]

How do they calculate the number sand and cement for wall construction

[@user-jn5td7on1r]

I find your videos very succinct yet deeply incisive and straightforward. How can I reach you please? I would have left my phone number here but I do not know if this comment section is public or not. Kindly reach out please. Thank you.

[@civilworks826]

Thanks. Glad you found the video helpful. You can reach me on [phone]. Call/WhatsApp

[@kennedymumba5187]

Thanks

[@civilworks826]

You're welcome

[@abbassalisu9245]

❤❤❤

[@sekatawasamkaggwa9507]

Its a good work, how do we calculator iron bars in the slab

[@civilworks826]

I'll try and do a video on bar bending schedule at a later date. Thanks

[@maybinkashimoto7618]

Thanks. your explanation is excellent. But it could have been far much better if you had done it a little bit slow. As you know we are not at the same level of understanding so as to allow us who are slow to grasp the sense out of it

[@civilworks826]

Thanks for your comments. I'll try and accommodate your concerns in my next video. 👍

[@SELPINVESTMENTS]

Let me subscribe first ....Thanks buddy

[@civilworks826]

Thanks. Really appreciate it.👍

[@musaumarmohammad2929]

Please make a video on how to calculate number of steel bar and cement in casting 14 pillar and slab with a dimension of 10m by 10m

[@civilworks826]

In order to calculate the number of steel bars, one will need to have the structural drawings and use it to prepare a bar bending schedule (BBS). It is from that BBS that the number of reinforcements can be calculated

[@civilworks826]

However, a video of how to do that is in the pipeline. Thanks for reaching

[@WEEZEE01]

Please can you do a recent video of a house plan of 1000,1200 to 1400sqft i.e 20by50 to 20by70 with ground floor,first floor and second floor containing 3 to 5BHK. #Civilworks the materials needed and walls to be used whether bricks or stones or cement blocks

[@civilworks826]

Hmmm. That's quite an ask! Do you have a particular building plan? Or just any plan that fits your description?

[@victoremesim]

It is said what you are holding in the hand, you don't need a mirror to see it

[@user-kx7yo7sk4m]

we need more

[@civilworks826]

Ok. Is there any particular type you will like to see?

[@essamkatsu9469]

Thank you sir, i have one question, where did you get the 1.54? Please can you explain it furthermore.
Thank you

[@civilworks826]

The 1.54 is mainly to cater for the voids in the aggregates ie the spaces between them. If for example, you have a cup and fill it with stones, you can still put some sand in that same cup without the cup overflowing. And even with the stones and sand "filling" the cup, you can still add some water, again without the cup overflowing. You get the idea?

[@essamkatsu9469]

@@civilworks826
Yes I got the idea.
Thank you

[@beeolabadmus1803]

thank you can you dfo videos on rigid pavements in the Nigeria context most the videos on youtube are for asians

[@civilworks826]

Glad you liked the video. I've actually thought of doing a video on rigid pavements. Soon

[@ridonngandu8290]

thanks

[@ridonngandu8290]

thanks, very helpful 😊

[@civilworks826]

You're welcome!

[@Gabriel-qp5tn]

This video is exactly what I need to know, but still don't, kindly assist, 22 meters, in length, 600 cm in width, and 10cm in height, footer for my block wall, M25 concrete recommended, 1: 2:2 ratio, I think, how many cement (50kg bags) how many wheels barrows sand, and stone?

[@ambroseoyanga7018]

Where did you get that 1.54 from am stack from there

[@civilworks826]

The 1.54 is a factor that is used to allow for the voids in the aggregates. By the time the constituents are thoroughly mixed and compacted, all the void spaces in the gravel and sand will be filled up, leading to an increase of the dry materials.

[@sriraginteriors]

If we calculate in feets, different quantities coming... shall we calculate in feets or in meters

[@civilworks826]

It doesn't matter which one, as long as you're consistent with the units, the result will be the same

[@falookkanyamazero3544]

Thank you very much sir for your interpretation and your calculations.
My question is how can someone come up with a design of main Hall.

[@civilworks826]

Main hall? I don't quite understand the question

[@angelaonwuka1987]

That'd be the reinforced concrete design
He's only quantifying in this video

[@civilworks826]

@@angelaonwuka1987 👍

[@basscoconstructionservices7222]

Sir how can i calculate the volume of Mass concrete of LxBxH which is 79 length B39. 5 Height 0.5

[@civilworks826]

Your question is not very clear. Get in touch via the number in the description box

[@kunleali6397]

How can you calculate for current concrete rate which can be used for quotation.

[@civilworks826]

The price of concrete will depend on the price of the constituent materials (sand, chippings, water, cement) as well as the desired grade (C15, C20, C25 etc), cost of equipments (mixer, poker vibrator) and the cost of labour. You will agree that the rate will not be uniform across the country

[@civilworks826]

However, using the slab in the video, a rate breakdown per cubic meter of concrete can be thus;
1. Cement: 6.3 bags x 8,000 = 50,400
2. Sand : 0.7 tons x 6,500 = 4,550
3. Gravel : 1.3 tons x 8,500 =10,400
4. Water: = 500
5. Equipment (mixer, etc) = 5,000
6. Labour = 10,000
7. Overhead and profit:@20%= 16,170
8. Total cost per m3: = 97,020.

[@elizabethmaswabi4757]

I have a question on the density of sand and crushed stones, according to bs 648, the density of sand is in a range of (1602 plus or minus 160kg/m^3), is there any reason you used 1600kg/m^3 only?

[@civilworks826]

Well, 1600 kg/M3 falls within the range doesn't it? For practical reasons, actually.

[@civilworks826]

When carrying out a mix design, you will need to establish the actual densities of the materials regardless of what the table of values state. I've once encountered gravel with a density of 1850 kg/M3.

[@elizabethmaswabi4757]

@@civilworks826 it actually does, thank you sir.

[@chriscastro2313]

How much water was added to the 1:2:4 ratio?

[@civilworks826]

The water content is based on a water: cement ratio of 0.5, ie about 25 litres for each bag. However, this volume is just the free water and not the total water. On site, the total water is between 30 and 40 litres per bag, depending on the workability required

[@shadrachfahn1013]

Thank so much for your clear explanation, but you are too fast. Can you take time in your calculations please sir?

[@civilworks826]

Thanks. I don't think I'm actually that fast. However , you can adjust the playing speed of the video to your preference

[@queenbeyonce6922]

How many 10kg in 6.3 ton

[@civilworks826]

Well, 6.3 tons is approximately 6300 kg so for 10kg, that will be 630

[@edutt14]

What if we use 1m3=1000kg
To change volume of cement in m3 into kg??

[@civilworks826]

That will not be correct. It is water that 1m3=1000 kg, Cement has 1m3 = 1440 kg

[@edutt14]

@@civilworks826 thank you

[@civilworks826]

@@edutt14 You're welcome

[@EmmanuelMmaduabuchi-et2vx]

How come of 13.8
.

[@civilworks826]

Watch to the end, the explanation is there

[@voiceofthunder7345]

In this hard Nigeria who uses 1:2:4 mix ration

[@civilworks826]

A lot of people, actually. If you're interested in your house lasting long without carrying out repairs every year, that initial (additional) cost is well worth it

[@voiceofthunder7345]

My last question is how many wheel barrows makes 1 ton?

[@civilworks826]

@@voiceofthunder7345 Depends on the material you're loading and whether you're heaping it or level in the barrow. A wheel barrow is about 60 - 65 litres (flat). More when heaped. So, when full of aggregates ie sand or gravel, it gives approximately 90kg. That means you will need about 11 wheel barrows to give you a ton

[@SARA00151]

1.95 is that volume of cement ?

[@civilworks826]

Yes

[@civilworks826]

Actually 1.98 m3

[@SARA00151]

@@civilworks826 thank you for the video it’s immensely helpful

[@civilworks826]

@@SARA00151 You're welcome

[@rajiolamilekanyusuf7815]

You didn't consider waste in your calcution. With this you
can cause dispute between client and contractor. Regards

[@civilworks826]

Maybe so, but waste is a highly debatable component of the material estimate. Why should the client pay for "waste"? I think the cost of "waste" should be factored into production of concrete and not the material requirements. Great point, though.

[@user-vb8sd1zu4r]

What is 1:2:4?
1 it is cement or sand or gravel?
2 it is cement or sand or gravel?
4 it is cement or sand or gravel?

[@civilworks826]

It's the proportion of the constituents. Like 1 bucket of cement mixed with 2 buckets of sand and 4 buckets of gravel

[@globaldiscovery4058]

How can someone contact u.. i need ur contact plz. Its very important

[@civilworks826]

Thanks. Glad you found the video helpful. You can reach me on [phone]. Call/WhatsApp

[@InnocentSibomana-im7kx]

I need to join this group

[@rabiuzayyana7817]

Please i want design a concrete mix of grade 30 that is M30 please i want your assistance. if possible i can contact you privately if you can give me your username please thanks.

[@civilworks826]

Glad you found the video helpful. You can reach me on [phone]. Call/WhatsApp