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We are getting more in depth about our HRWR dosages in Illinois. Specifically we are seeing what HRWR naphthalene lignin poly carboxylate and its effect on Air entrainment in concrete. I know this is diverse and vague explanation but do you have any information on this? You talk about so many different aspects in this series but do you properly cover air entrainment and the effects of HRWR on Air Entrainment?

Have you made Colloidal Cellular Concrete? Heard that at Densities between 1000-1100kg/m3, it reaches compressive strengths of more than 50mpa. You know?

Which mix design procedure should be applied for lightweight Pervious concrete as per ACI code??

On a deep dive into concrete topics late at night, I’ve been curious about the practical effects of high-range water-reducing (HRWR) admixtures on air entrainment, especially when using the pressure method for on-site air tests. What factors cause the test results to 'jump,' leading to lower air dosages at the plants as a precaution? I understand that the defoamer plays a huge part but essentially why do we see low specific surface and spacing factor results that don't align with the on-site air test outcomes? Essentially, we need the same series, but focused on types of air entrainment, their importance, and how the effects vary based on the mix. START THE VLOG BACK UP!

Just found this channel. Been pumping concrete 25+ years and your videos are extremely helpful and educational. Thanks for what you do 🤙🤙🤙

Amsterdam, I was told that Dutch forced labourers in WW II , pouring concrete along the ,Atlantic Wall, to place big guns on top for the Germans. Was sabotaged by all of them adding sugar in the mix. The concrete got britle, and cracked. When the first test salvo 's were fired.... 10 workers got randomly executed, in front of all ,slaves, And all sugar was banned from the building sites 😢

Engineering terms made simple. Thanks

isnt it the compressive strength is calculated by the bigger area of the cylinder? the diameter x height?

I’m assuming your mixes containing colloidal silica are made using liquid colloidal silica additive? Can you get the same results using dry powder like silica fume (cabosil)? From my understanding of making a good clay body in ceramics, particle size distribution plays a huge role in strength of final product. Is the colloidal silica in concrete helping with the particle size distribution on the very fine end, and adding strength because of that? Or is it some other property of the colloidal silica?

Can you tell me one thing that I am trying to make white cement showpiece but the white cement is not getting tightened.....

So cars accelerate the degradation of the concrete structures they drive on through their emissions. Interesting.

I wish she was my wife

Thanks, Dr Belkowitz! Question: iron silicate is the primary material waste resulting from deep injection geothermal wells. Would this iron silicate work poorly as a concrete aggregate?

Hence not allowing slab to cure properly as a unified slab structure overworking concrete does bring air to surface but cooking with steel creates heat: in my opinion never book taught but like video keep sharing thanks jtravis

I have come to the conclusion through yrs of experience steel cooks top surface causing faster setting time of top surface creating a void or seperation from bottom portion of concrete top has such faster setting time when a cure and seal is used i believe this allows a chance for bottom portion to pull top portion together have a sealed barrier preventing massive water loss from top portion

can drinking silicate (from soda water) dangerous?

Just like pump mix. She’s got the lube! I’ve got a few questions 1. What causes concrete to flash set? 2. What’s the difference between hydration stabilizer and retarder? 3. Do you think brown sugar is more potent than white sugar for killing concrete. Thank you good sir, I love your channel

Im gonna try sugar, flour, and eggs and make a croncrete cake. Thanks for the idea. Haha.

Instead of pozzolanic % can I just use reactive fraction I.e total amorphous material? For OPC equivalent this would just be the cement phases (e.g. alite).

I understand that clear benefits, but every time I see pervious concrete slabs, it is full of cracks and settlements. It seems to me that the same water that leaks through the aggregate also washes of the soil that supports the concrete, therefore settling it. And if it needs replacement in few years because of that, then it seems like it's more eco-friendly to built with regular non-pervious concrete. What do you guys think?

Excessive cementitious/UPC "expensive ultra fine aggregate". Many thumbs up!

A quick clarification question. One method says: “Prior to mixing the test material, the mixer should be “buttered” using aggregates and a non-air-entraining cement other than that supplied by the cement and concrete reference laboratory.” I’m a believer of buttering the drum with a non-representative random mixture of mortar. The 3 levels of butter accuracy: 1. No butter bare drum. Pros: simple to do. Cons: paste + sand (Mortar) will be left in mixer. The final batch will have a higher coarse aggregate percentage than designed. Smaller batches will lose a larger percentage of their batch to coating the drum. 2. Random butter to coat drum. Pros: almost as simple as above(1). Theoretically no mortar should be lost from the buttered drum to after dumping out the mixed batch. Cons: cement+SCM’s+water+sand left in the mixer may not match the final batch proportions exactly. 3. Representative butter sample identical to that of the tested mix design. Cons: Much more complicated to get a mini-batch to the same slump & entrained air consistency as the final batch. It takes time to test & adjust even before completing the main test batch. Pros: Theoretically should be the most representative if the exact same raw constituents are used from butter to batch.

For full experiment you had to reduce the amount of water on 3 and 4, just because you can. Maybe because it was too liquid, it separated the cement from sand.

Please make a light emmeting concrete

Hello Guys. I'm surprised that there are no comments on this page. Spraying water while finishing concrete is a standard procedure on many commercial job sites, and virtually ALL residential job sites. To the point that finishers will not even discuss the practice. Are either of you civil engineers or associated with the ACI or NRMCA? I agree with your accessment, but by what authority do you speak? Thank You.

I bet you are a heavy metal singer with that voice , 80's metal ?

What would be the best ingredient for making air-crete more insulation factor Sir ??

What is added to cement to increase the strength from 5000 psi to 25000 psi ???

The one use I've found is that a crumb rubber placed in concrete can allow a concrete to be nailable, like wood. You can hammer it by hand but the nails hold as well as they do in wood. It's an interesting concept if you want to look into it.

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just talking... but no illustration. Would be better if showed with the illustration or pictures of the subject 👎👎👎

Are you serious? What about compressive strength? One of the most important..

Come on the correct response is pointing out they should have just put down a roll of painters plastic.😅😅😅😅😅 I just realized all they needed was just painters plastic.

320+ DOT bridge decks and overlays cured with E5 in lieu of external curing now 👍

Nice video! Are you talking about adding super plasticizers or what else in the concrete mix you saw being used for wine tanks in Northern California?

My concrete is failing after 5days when we are stressing it W e have post tensioned slab.Bursting is occuring for M40 grade.

i completely understood. thankyou dear

voice to low...

Came here because I wanted to use pavers for my garden but having second thoughts.

Can resin be addwd to the system? Like SBR or Acrylic?

How do u know the quality of the RC? The higher the Cement part the better the RC? or how do u measure it, so carbonation and following corrosion ocur in the longest time possible?

Didn't help.

At a PH of 10.8 and above it is no longer nano colloidal silica.

Hi … I found and subscribed to this channel for one reason. To be relatively intelligent sounding when giving tours of our historic “Sandfloor Synagogue” built in 1833. I tell people that our builders added molasses to the “rubble construction’’ of the walls reinforced by European produced bricks at entry locations. This helps me a lot. If you google us, you can see what I am talking about. Thanks, Rob in the USVI’s #Sandfloor_Synagogue .

How are people getting sick from concrete vases?

Can you emulsify graphene using polysorbate?

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Hit me up if you're interested seriously😮🎉❤

Let me say to you what would it be worth to you if I came up with the product that you couldn't crack