Concrete Testing Tempature

There is no need to ask here, for the criteria will be written in the test procedure to hand. If they aren't, that test procedure is worthless!

Then repeat the experiments taking temperature into consideration, determine acceptability and re-write the procedures. Sheesh!

This was not an experiment it's real life and large expense is at stake. I would prefer that you would answer with some form of technical solutions or criteria.

The solution was to take temperature into consideration to begin with!

More so when large expense is at stake. Are you seriously asking this here in a anonymos forum?

There is consultants out there that are willing to answer the question for a little fee that compared to your large expenses at hand seems like pocket money.

But you will have to scoop out a lot more data if you want a proper answer starting with what cement you used, impact time of high temperatures, concrete mix and so on.

Good luck in the real life!

Thad, I sympathize but I don't understand. In each company where I worked, the specifications included hot and cold weather concrete placement. I think the question goes back on whoever wrote the procedures and or specifications.

Sorry, I realize that that's not much help.

There may be something here.

This reminds me of another discussion thread:

New CR4 Member, original post: How much money does a bag of groceries cost?

Established CR4 Member: The selection criteria before shopping (shopping list), together with the actual selections made at the market, will give the answer.

New Member: Since I didn't make the shopping list or go to the market I am not responsible for the results of the shopping trip, although I am responsible for the budget and will be judged by my ability to balance the budget. Rudeness removed by CR4 Admin.

Wow... this fellow really didn't give us much to work with. What sort of response did he expect to get? We don't even know the size of the shopping bag!

If you want the best cheap advise from here then do one of the following:

1. Learn about concrete as quick as you can and make your own decision
2. WAALSEDWI (walk away and let somebody else deal with it)
3. Hire a consultant that has the expertise to safe you the money and pain you have to spend afterwards anyway

As far as I am concerned the only one wasting time is you. And dont expect sympathy with the attitude of yours!

nice spelling

I'd say that PWSlack is full of good information, not himself.
Procedure of Concrete Compression Test - A Civil Engineer
CIP 35 - Testing Compressive Strength of Concrete (PDF)
Correct Concrete Testing Procedures Are Important - Testing ...

Thad, "without value and basically a waste of valuable time and resources."

It's an anonymous forum. The only participant in this discussion that is being paid here is YOU! You are being paid to find the answer, not us.

I'm really pleased to see that you can also read, that's an important step in learning. May be you could pay me in gold next time, hot air is hard to live on. Let's for instance assume you knew what you were talking about. You might know of a study where as the temperature was increased the break pressures went down by a measurable amount making the actual compressive strength of concrete under similar conditions predictable. Such information is the value that I seek.

If that's all you wanted you should have said so. Unfortunately, with an attitude like yours, I can assure you that you will never be given any help here.

Go find someone else to do your work for you, FOR FREE.

It's "temperature".

If you referring to fresh concrete 60-80 F according to ACI If referring to water bath for maternity strength compression test 32-104 F. Time and rotation of mixer will also affect the strength of the concrete these should have been kept track of each load along with the temp of the concrete coming out. If its beyond its time or routed to many times you end up with what's called a hot load. The hydration chemical ration have gone into full swing and the load become hard to work with and weakens in strength. Hope this helps.

A good manual to read up on is NECEPT 2011 Concrete Manual. You should also read up on ASTM C 31 which has all the requirements for testing cylinders. ASTM C 1074 covers the maturity test method from 24 hrs to 28 days. These are the requirements followed by both private and public institutions. As stated before there is a whole list of things that can affect your strength besides temperature.

But Moosie, he could still PM you and pay you for the answer! Always show a little bit sense of business, even here!

Ahhh, but here's the rub: Methinks that 'ole Thadie boy would be a PIA Client. Therefore, he isn't worth my valuable time. I almost always turn away such work prospects because I cannot justify the time and effort spent on such a client. I'm already way too busy with my current client load and their respective projects. Besides, I don't think he could afford my Professional Engineering Consulting Services fee.....cheap I'm not, and you get what you paid for is a motto I live by. By coming in here, he's looking for expert advice for nothing, not a dime. Ya think?

Ya right!

Since it's already been poured, take cores! At least you'll have a definitive answer to what you have in place. One thing to keep in mind most concrete mixes are fairly forgiving.

Hopefully he doesn't have rebar in the slab.

If the cylinder cast just before 24 hours then the temperature should not be more than 40 degree Celsius. If the temperature is more then there should be a deviation on strength . Bring down the temperature to the requirement before testing.

Thad, Here is your answer-

Take your test cylinder and measure the apparent temperature. Must be the apparent not the ambient! Invert the cylinder and divide it in equal obtuse sections of the same height but not necessarily the of the same tangential acute angle. Next, radiate these pieces in a thermal generating short wave length irradiator with a wave length of not less than 3.1415 milli-microns. Divide the resultant temperature by the third power of the volumetric capacity of the thermal generating short wave length irradiator and multiply that by the square root of the sine of the obtuse angle. This is the resultant temperature in Kelvin of the volumetric conditions of the previously mentioned acute angle surfaces. This should be the high temperature for the first 23 hours. Extrapolate from there for the desired 24 hours conditions.

Take into consideration that most of the previous posts have come from some really great minds. Please excuse their assumptions, arrogant replies and apparent deviations from the subject manner in order to delve in the delivery of the question. They know far less than you apparently do.

Just remember, if you need an Experimental Experiment of the apparent strength of concrete, I'm available for consultation, for a reasonably large sum.

All the best to you and your associates!

Good Luck, Old Salt