ACI Density Test: ASTM C138 Density (Unit Weight) 2019

[@underthenorthernstar]

I’m ACI certified for field tech grade 1 but I still come back to these videos because they’re so well made. Good work

[@MuhammadFayaz-jd6tn]

dear which test include grade1?

[@ZiaKhan-cf9xi]

What is aci....

[@underthenorthernstar]

@@ZiaKhan-cf9xi American Concrete Institute

[@aletapearce2369]

no gloves?

[@jesusglopez8430]

Thanks for sharing.

[@babarzia9281]

(Weight of concrete + Weight of empty measure) - weight of measure / volume (32.865 - 7.79) lb / .25 FT CUBE 100.3 LB/FT CUBE IS THE DENSITY

[@Tranceporter33]

32.865 lbs is the weight of the concrete without the weight of the container/mold. So you're subtracting 7.79 lb that was Already Subtracted. That's where the error is.

[@andrewharwood7033]

We do that so different in Australia.

[@jacksongatlin5418]

Because you’re all criminals

[@HectorLopez_]

NICE SKECHERS

[@ВоваСкуйбеда]

「あなたの動画はとても良いですし、メッセージがた

[@kromekicks]

Is the required frequency of this test daily or weekly per mix design?

[@Chibi_Sentai]

kromekicks depends on the job and what engineers want you to do

[@Greyskullill]

Some projects it's daily, fdot it's a must..some commercial projects also

[@ghostlyOne00]

How did you get the mold volume

[@nothingtoseehere3839]

All meters come machined to a precise size from the manufacturer, 0.25 cuft

[@sangwanyi4469]

By measuring the weight of water of the container considering volumetric correction factor depending on water temperature.

[@juliusclarkparana7654]

32.865÷0.2504=131.25

[@michaelparionaramos4097]

Where is the weight of empty measure?

[@babdabubda5266]

@@michaelparionaramos4097 The pot was tared, meaning that when he took the empty pot off of the scale after the scale was zeroed, the scale reads the negative weight of the empty pot. So when he puts the pot back on to the scale when it's filled, it subtracts the weight of the pot for you. That allows you to essentially weigh ONLY the mass of concrete. Doing that means that you don't actually have to use the mass of the empty pot in the equation.

[@michaelparionaramos4097]

@@babdabubda5266 Thank you very much for the brilliant explanation.

[@babdabubda5266]

@@michaelparionaramos4097 Haha of course man, have a good one.

[@AlexRodriguez-lk1jy]

sweet, thanks

[@rarecandy3445]

heard him tap the bottom with the rod

[@22udubfan]

Sir, you don't zero the scale AFTER you get the tare weight. Pointless to get a tare weight if you zero it out. Therefore your math is now wrong.

[@gabrielkramer9164]

Hey Jimmy, you record the weight prior to the tare. You can see this graphic representation on the screen as we do it. As long as you note this, you can account for it in the end. There’s more than just a single way to do this.

[@orendarisingprod.6419]

Well with most if not all calibrated scales once you get the weight of the pot and get the tare the scale resets to 0 then once the pot is removed it would show into the negative. Example. If the pot is 8lbs and you get a tare down to 0 once the pot is removed the scale will read -8lbs if I’m not mistaken.

[@splash6450]

@@tanumie2657 To prevent concrete from sticking, making it easier to clean. Keep your tools happy, and your tools keep you happy.

[@josecauich8790]

is the math correct?

[@MegamanBillydaKid]

I think it’s wrong I got a different result! I got D=100.3

[@eritimes]

Safety issue! No gloves, concrete is caustic to the skin.

[@curtisw831]

Some of us don't have an issue with it

[@fadedace1342]

Hes using fly ash, but yes you can get some pretty bad concrete burns from this

[@rickelliott777]

Man Up😂😂😂 Ur right