Dear Deepankar. Let me get your idea right. Are you thinking of outdoor curing using the natural heating from the sun, or you want to use an oven which has no temperature regulator?

Kindly clarify your idea, so that I may give an appropriate answer.

Thanks.

Good day

The concrete curing if quality control standard tells you total immersion for 28 days or fourth curadom ASTM C-192. But if you do not have your camera cure you can have your specimens immersed in water, of course you can vary the method according to your research. If you're not curing room, just place them in water.

I agree with Miguel, place them in water, preferably at a constant temperature.

I agree with Miguel, place them in water, preferably at a constant temperature.

Thanks for the suggestion Mr. Saheed Kolawole

Thanks for the suggestion Mr. Miguel

Thanks for the suggestion Mr. Ingmar

More than temperature in your given limit humidity affects strength development. Type of concrete is also important, you must specify both.

No, is absolutelly not correct to make the curing of the probes in a curing chamber without the control of the temperature. Because the results of the strength of thre probes will be so variable. You can use the specifications of the American standard ASTM or you can curing the probes inmmerse in water "inside the laboratory" at controlled environmental temperature. High temperatures will accelerate the strength at the first times, but the results at 28 days will be lowers and lower temperatures will decrease the strenght at the first times, but increase the strength at 28 days.

Yes true. Generalised statement is not correct, increase in temperature will not always result in high strength their is an upper limit depending on concrete type. Here also humidity comes in picture 30,50,70,90,or 100% etc compared with constant humidity, decrease of humidity decrese strength due to shrinkage associated problems. As per BS code concrete no need to be cured if the humidity is greater than 85%. From Swedish, jerman codes strength based curing time provisions.  Country to country it varies. In the question ambient temperature range is given not humidity hence if humidity falls below 75 % strength drops in measurable limit. Below 50% it is 40% less than normal cured normal concrete. Here concrete type grade aggregate cement content also effect no single solutions to this. Detrimental level depending on above said things. In case of Geopolymer it is quite different than this.

Hi good day

Do not worry, you can do your research and put your concrete specimens in water in my Masters thesis put my specimens in 20 liter buckets were 18 buckets.

But if you want to analyze the effect of curing type can do, with the variant cure most commonly used in your region, you can consider a curing work, curated by standard (ASTM, ONNCCE, BS, etc.) or without curing .

Actually always the quality control is based on rules, and if you propose research variables according to the state of the art of the subject.

Just define your variables and do it, time flies.

good day and best regards

Yes I agree. For more details on effect of curing temperature and humidity on normal concrete refer advanced concrete technology by PK mehtha. Non of any condition is applicable universally, concrete is a beautiful material which always give surprise.

If you are looking for concrete which develop equal or higher strength without curing  compared to normal concrete with normal curing please refer my publications.

dear researcher, don't worry, you perform curing on room temperature, but need to mention appropriately in methodology.

If possible, record the room temperature, and count the effect on strength of concrete based on any published literature/book

thank for the valuable discussion by Mre. Migel & Mr. Mithun

actually i am research high strength self compacted concrete (120+ MPa) we are testing on mechanical properties and as well as durability properties, so we have lots of samples that's why we are not able to temperature controlled curing for concrete samples (365 days duration).

Please can any one suggest me solution for the same.

thank for the valuable discussion by Mre. Migel & Mr. Mithun

actually i am research high strength self compacted concrete (120+ MPa) we are testing on mechanical properties and as well as durability properties, so we have lots of samples that's why we are not able to temperature controlled curing for concrete samples (365 days duration).

Please can any one suggest me solution for the same.

thank for the valuable discussion by Mre. Migel & Mr. Mithun

actually i am research high strength self compacted concrete (120+ MPa) we are testing on mechanical properties and as well as durability properties, so we have lots of samples that's why we are not able to temperature controlled curing for concrete samples (365 days duration).

Please can any one suggest me solution for the same.

Thanks for the suggestion Md Rezaul 

Thanks for the suggestion Md Rezaul 

It is acceptable to keep samples cured in room temperature. As you know, curing plays a major role for the first 28 days, afterwards, its effect starts to diminish. If you can maintain the curing tank within room temperature (20-25 deg C) for this period, this will be sufficient. For the rest of the 365 days, the samples can be left in the tank without temperature control other than in normal room temperature. It is advisable to mention these conditions in your discussion of the results  

Dear Osama Daoud Sir you have solved a big problem of mine, thank you so much for sharing your knowledge and experience with me.

Curing temperature has a lot of influence on the strength development of concrete. There is a concept called maturity which is defined as a product of curing temperature and the length of time at which the concrete was subjected to that temperature.If you want to compare concrete specimens they have to be subjected to the same curing conditions or they have to have the same maturity. A concrete curing chamber ensures (once the curing temperature is set) that all the specimens are of the same maturity during the testing. By not using temperature control you cannot compare the specimens since they will be of different degrees of maturity.

 Dear Deepankar Ashish,

I am attached here with the Indian Code practice for Concrete control curing for your Reference .

 Dear Deepankar Ashish,

I am attached here with the Indian Code practice for Concrete control curing for your Reference .