What will it do in high temp refractory mixes? Could it be used to essentially strengthen clay or calcium based refractory mixes. I been doing alot of experimentation in refractory for lining foundry and forges and have had best results with sodium silicate. But the sodium seems to be a negative factor. Wondering if I could use colldial silica to remove the sodium content.

@jon_byler

2 ай бұрын

Commonly used in ceramic shell mold making.

Building an ambient pressure submarine--can collodial silica be used with epoxy resin to be subjected to the pressure changes if diving (to 33 feet) & surfacing, repeatedly?

@IntelligentConcrete

3 жыл бұрын

Unfortunately I do not but it would be an awesome set of experiments to run.

Thanks for your steel ball abrasion test on the reference and colloidal samples. The colloidal silica might have given you a 300 - 400 % decrease in material loss from the steel ball test , what outcome would you get with hydraulic degradation as experienced with water pooling impacted by vehicle tyres on highways ? Moderately Coarse surfaces would be popular with road builders for tyre adhesion , too coarse a finish would increase fuel consumption , too smooth a finish would become a safety concern . Also too coarse a finish would propagate pitting then potholes when water is impacted by tyres. You probably have a sweet spot in the middle that gives best safety , best fuel consumption and reduced hydraulic abrasion wear ?

@IntelligentConcrete

10 ай бұрын

50-70% percent reduction depending on how long it’s been pooling.

Can we get a video on any advantages of using CS to pretreat the concrete prior to applying epoxy? Pros cons, when or how long to wait.

@IntelligentConcrete

3 жыл бұрын

Can do Mario!!! Its a good idea to use ASTM D 4258, 4259, 4260 to prep the surface to ensure a good profile before applying.

I need your advices i tried making sodium silicate by using press cooker, in the end it was so murky my mistakes i didnt clean silica source thouroughly, but there are very strange situation, my waterglass eventually jellified in hours, in my curiosity i brush on some surface instead coating that i expected what amazed me is something grow like nanofiber but verrry fluffy kinda like cottoncandy, what do you think it was?

@IntelligentConcrete

3 жыл бұрын

It sounds like microgels. We see them before the felling process occurs.

@dogodogo5891

3 жыл бұрын

@@IntelligentConcrete i collected them into a glass jar and its very light in mass, but relativily high in volume, did it have anything useful Maybe as filler or additive?

Hi Which type of retarders Works well in colloidal silica_OPC system for Adjustment setting time and working time of concrete?

@IntelligentConcrete

10 ай бұрын

Any really. It’s all a matter of sequencing them at the right time.

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?

@IntelligentConcrete

2 ай бұрын

There a lot of properties we get out colloidal silica: instantaneous pozzolanic reaction, accelerated cement dissolution, particle to particle packing and more. You could get similar benefits from silica fume and the like all be it not to the degree.

I need your advice! Currently looking at Colloidal Silica admix for thin extruded concrete product. Any help/advice would be great.

@IntelligentConcrete

3 жыл бұрын

What’s a good email address 2506Larry?

@2506Larry

3 жыл бұрын

@@IntelligentConcrete larry2506@mchsi.com

@2506Larry

3 жыл бұрын

@@IntelligentConcrete larry2506@mchsi.com

How about using Diatomaceous earth, it's 80% silica and cheap?

here to buy?

Hey there i had a doubt regarding colloidal silica can you help me????

@IntelligentConcrete

4 жыл бұрын

Sure, what questions do you have?

So what's the upper limit of colloidal silica and does that also apply to others like micro silica?

@IntelligentConcrete

3 жыл бұрын

Howdy Jake. Thanks for the question. It depends on the particle size distribution and the Cementitious binding chemistry. Smaller particles it’s normally around 2% and the largest particles have a limit of 20% cement replacement.

@feiter

3 жыл бұрын

@@IntelligentConcrete is that by weight or volume?

@IntelligentConcrete

3 жыл бұрын

@@feiter it’s by dry weight and the converted back to volume of liquid. Also you can use fl oz per cwt with most products that are currently available, much easier.

@feiter

3 жыл бұрын

@@IntelligentConcrete amazing, thank you. I can only find west systems powdered colloidal silica used in resins (0.012 microns), here in Auckland New Zealand. Does your info apply to this too?

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

@IntelligentConcrete

4 ай бұрын

More air

@victoryfirst2878

4 ай бұрын

Thanks@@IntelligentConcrete

You guys are putting out some great videos. If you wanted to cover some of the benefits of densifiers in relation to an abrasion test that would probably be very popular with the decorative community. I know a lot of people are curious how colloidal silica compares to a traditional densifier in performance. Would they be roughly the same when properly applied or is there a greater depth of penetration with colloidal silica.

@IntelligentConcrete

5 жыл бұрын

Hey hey John. I through together an answer on this on LinkedIn and plan to get a video answering this question. Here is my blurb from LinkedIn: “Thanks for the question Jack! We have a video on this going up this week. The answer to the question is a bit long-winded. I’ll try and bulletize it below. I’ll send the link once the video gets posted. - Yes colloidal silica can penetrate into the concrete. Just like deicing salts that penetrate into the concrete and break it down. Colloidal silica migrates through the surface, sub-surface, and body of the concrete; this assumes that there are pathways for this to occur. These pathways are created either by the natural porosity and percolation of concrete or by cracks that have formed from volume change or fatigue. -The migration of colloidal silica can be accelerated by some type of catalyst and the method of application. - The depth of penetration will also be dependent on the size and surface area of the nano silica. The smaller and more silica Rich the surface area, the faster the nano silica will react with available Ca(OH)2 to form more C-S-H. The larger the nano silica particle and the more coated the surface is, the lower the potential for reaction and the is a greater chance for depth of penetration as well as longer fare of reaction. Let are bunch more factors that play into this but I think it could be...”

@IntelligentConcrete

5 жыл бұрын

“... argued that the aforementioned have the greatest impact...” Thanks Again for the question.

@IntelligentConcrete

5 жыл бұрын

John Cernava traditional densifiers like potassium, sodium, or lithium silicates will has a faster reactivity then most nano silica dispersions. Due to the reactivity the potential for penetration depth is reduced significantly when compared to a nano silica densifier.

Please can you enhance your audio equipment, will make huge difference

@IntelligentConcrete

2 жыл бұрын

Absolutely

The dislikers need to get a life

@IntelligentConcrete

3 жыл бұрын

Thank you Sebastian!!!!

But can I eat it?

@IntelligentConcrete

4 жыл бұрын

Leo Brazz noooooooo

@leo959

4 жыл бұрын

@@IntelligentConcrete thanks 4 the info

@heartobefelt

2 жыл бұрын

Yes of course. But only once.