Nobody has endorsed a dry pour since roman times................screeding a dry pour segregates the mix agitation is necessary in my opinion..........i have no formal education but i also have decades of experience as a cement finisher on all rypes of jobs
Not in the concrete trade, Electrician actually, but considering a home build with a basement. Poured walls take a beating here in the NE and can see how this would provide a margin of protection of a wall structure in frost/freeze situations. What I don't get is what additives and how to produce a consistent and efficient mix to entraine the critical air bubbles in the the mix. Does vibrating the concrete adversely effect the bubbles, their size, and their distribution in the finished concrete? Interesting information but crap does it set my mind to a boat load more questions!
Thanks Mike, The method helps you evaluate different admixtures or mixture designs to find out which ones work and which ones don't. Typically, vibration only removes the large bubbles from the concrete; however, if you leave the vibration in for long enough then you can start removing smaller bubbles. This means you need to be careful how long you vibrate.
HI Tyler. Love your channel. I was wondering if you could do a video comparing all of the different "aerated concretes" and other "lightweight" concretes, where people add styrofoam, sawdust, hemp, etc, as well as the difference between foam versus "celllular lightweight concrete". I love the idea of light concrete, but hate the idea of adding SOAP to it....just seems like a bad idea to me. Lastly, your thoughts on the Polish company DOM 3E, and their lightweight interlocking blocks. I hope i have given you some good ideas for some future videos.
Sure would be good to know how many ozs of liquid soap, + What is the best soap, to add per yard of concrete? And does it play well with a water reducer?
Dear Professor, How does the fresh concrete pore will related to strength? Even the hydration & nucleation growth occurs during curing. so matrix might get denser in curing age. But Spacing Factor will be more reliable than SAM
I’ve done extensive testing with synthetic and organic foam concrete. I absolutely love it except, the cure time. On another subject, it would be great to see a video about how the different size vibration motors and position of weight plates within those motors effect various slump variations of concrete using a globally used standard, say for example paving moulds or similar.
We have a lot of cool research on vibration that we recently presented at ACI that we are doing for the FAA. Stay tuned and I know it will end up in a video soon. It is exactly what you are talking about.
If I ensure my concrete mix designs have a Sam number of less than 0.2, then i will get better strength air entrained concrete? That’s all my region cares about so this might be beneficial to me for strength purposes
How's it goin' professor!!? Just wanna ask you Is there an AASHTO concrete mixture design procedure? Cuz here on our company they're bragging about it like it's an mythical method to design. As far as I know that AASHTO works only with asphalt concrete.
So how does this work.... I want a concrete mix with high impermeability especially one that will not crack and facilitate water penetration. I want a concrete that exceeds that specified as a minimum for for FEMA P-320 202103 Safe Rooms and can handle EF5 tornadic winds like those measure in the Moore, OK tornado (> 300 mph) say with a 20% safety factor so ~ 360 mph and handle pummeling by missiles (2x4s, etc) that such an EF5 would propel. Wall: a Flat Wall of RC 6" thick. Hypothetical, but how would the development of the mix proceed... a first design... then a SAM test of a small batch.... and extrapolations of the mixes properties.... a second adjusted design.... another SAM test.... a 3rd design and another SAM test... if getting close a casting and confirming tests of the SAM predictions using the hardened sample? How much does such a process cost in time and $?
That is a good description of the process. Ideally, this would be done by the ready mix producer and they would use the best combinations of materials. I am not sure air bubbles are your biggest need if you want a safe room. I would use fiber reinforced concrete and also rebar. You could also use UHPC if you want to spend the $$$. It was developed by the military for these type of applications.
Dry pour is trending right now, do you plan on doing any videos on how dry pour effects the strength of your concrete?
Nobody has endorsed a dry pour since roman times................screeding a dry pour segregates the mix agitation is necessary in my opinion..........i have no formal education but i also have decades of experience as a cement finisher on all rypes of jobs
@@freedumbofspeech1977 I'm hoping to find actual data on the effects, not opinions. Everyone comes up with excuses to ignore opinions, data is data.
Not in the concrete trade, Electrician actually, but considering a home build with a basement. Poured walls take a beating here in the NE and can see how this would provide a margin of protection of a wall structure in frost/freeze situations. What I don't get is what additives and how to produce a consistent and efficient mix to entraine the critical air bubbles in the the mix. Does vibrating the concrete adversely effect the bubbles, their size, and their distribution in the finished concrete? Interesting information but crap does it set my mind to a boat load more questions!
Thanks Mike,
The method helps you evaluate different admixtures or mixture designs to find out which ones work and which ones don't.
Typically, vibration only removes the large bubbles from the concrete; however, if you leave the vibration in for long enough then you can start removing smaller bubbles. This means you need to be careful how long you vibrate.
HI Tyler. Love your channel. I was wondering if you could do a video comparing all of the different "aerated concretes" and other "lightweight" concretes, where people add styrofoam, sawdust, hemp, etc, as well as the difference between foam versus "celllular lightweight concrete". I love the idea of light concrete, but hate the idea of adding SOAP to it....just seems like a bad idea to me. Lastly, your thoughts on the Polish company DOM 3E, and their lightweight interlocking blocks. I hope i have given you some good ideas for some future videos.
Thanks Clarence,
I will see what I can do. I don't know anything about DOM 3E. Take care!
Excellent 👍
Thank you!
Sure would be good to know how many ozs of liquid soap,
+ What is the best soap, to add per yard of concrete?
And does it play well with a water reducer?
Dear Professor, How does the fresh concrete pore will related to strength? Even the hydration & nucleation growth occurs during curing. so matrix might get denser in curing age. But Spacing Factor will be more reliable than SAM
I’ve done extensive testing with synthetic and organic foam concrete. I absolutely love it except, the cure time. On another subject, it would be great to see a video about how the different size vibration motors and position of weight plates within those motors effect various slump variations of concrete using a globally used standard, say for example paving moulds or similar.
We have a lot of cool research on vibration that we recently presented at ACI that we are doing for the FAA. Stay tuned and I know it will end up in a video soon. It is exactly what you are talking about.
Great to hear. Very much looking forward to that.
Very Nice Sir.....
Thanks!
If I ensure my concrete mix designs have a Sam number of less than 0.2, then i will get better strength air entrained concrete? That’s all my region cares about so this might be beneficial to me for strength purposes
How's it goin' professor!!?
Just wanna ask you
Is there an AASHTO concrete mixture design procedure?
Cuz here on our company they're bragging about it like it's an mythical method to design.
As far as I know that AASHTO works only with asphalt concrete.
There is no AASHTO design method that I know of for concrete. Do they mean AASHTO R101? This is a method to design for durability.
@@TylerLey I knew it!
No professor they meant a whole design procedure for the mixture.
This is totally wrong concept, AASHTO used for both concrete & Asphalt concrete.
So DIYers can just add some Dawn dish soap to their mixtures?
You can but I wouldn't recommend it.
So how does this work.... I want a concrete mix with high impermeability especially one that will not crack and facilitate water penetration. I want a concrete that exceeds that specified as a minimum for for FEMA P-320 202103 Safe Rooms and can handle EF5 tornadic winds like those measure in the Moore, OK tornado (> 300 mph) say with a 20% safety factor so ~ 360 mph and handle pummeling by missiles (2x4s, etc) that such an EF5 would propel. Wall: a Flat Wall of RC 6" thick.
Hypothetical, but how would the development of the mix proceed... a first design... then a SAM test of a small batch.... and extrapolations of the mixes properties.... a second adjusted design.... another SAM test.... a 3rd design and another SAM test... if getting close a casting and confirming tests of the SAM predictions using the hardened sample? How much does such a process cost in time and $?
That is a good description of the process. Ideally, this would be done by the ready mix producer and they would use the best combinations of materials.
I am not sure air bubbles are your biggest need if you want a safe room. I would use fiber reinforced concrete and also rebar. You could also use UHPC if you want to spend the $$$. It was developed by the military for these type of applications.
Hello concrete freaks ✌👍
Hey!!!
Love it❤
Thanks!
Cool!
Thanks!