Assuming you want to test the concrete filled tube, you could always use x-ray the specimen at various heights.

I would have used either 1) normal concreting practice (i.e. good concrete with a slump of about 80 mm and standard compaction by internal vibration; or 2) self compacting concrete.

I agree with the recommendation of self-compacting concrete emplar which in this case would not require the inclination of the tube, for details on self-compacting concrete suguiero consult.

http://oa.upm.es/1813/1/ANGEL_VILANOVA_FERNANDEZ.pdf

However you should take care of the particular granulometry in function to the free space to fill the tube to avoid segregation, it can think also that the use of ultrasound or similar techniques stack to evaluate homgeneidad filling tube.

In such cases, self-compacted concrete is more suitable.

Je suis d'accord avec la recommandation d'un béton auto-compactant bien formulé car sa fluidité assure un bon remplissage de tube et sans segrégation et l'utilisation des l'utrasons est plus éfficace.

The issue with Ultrasound is the effect of the steel tube, which may mask any effects from poor compaction.

What kind of structure are you dealing with? I mean is it a small scale and in the lab or it is a large scale and in the field??

Agree that SCC woud be the most suitable concrete to use, but SCC is a bit of a speciality product and you might need special equipment to verify the integrity of the SCC mix that you would need to use so that you don't end up with segregation. If SCC is not a practical option, then you could use a high slump normal concrete mix and vibrate adequately with a suitable poker or with external vibrators. You might want to vibrate in managable lifts which would facilitate better compaction of the concrete. Take care not to delay the placement time to such an extent that the concrete becomes visually "stiff" which would be an obvious hinderance to obtaining good compaction.

Te trouble with a high lump normal concrete is the potential for segregation.  If you cant use SCC, I would use a 120 mm (5 inch) slump concrete with internal vibration. The concrete should be poured at no more than 15 cubic metres per hour for a 75 mm (3 inch) vibrator or half that for a 50 mm (2 inch) vibrator. Remember that the 75 mm vibrator has a circle of operation of 600 mm diameter, and a 50 mm vibrator has a circle of operation of about 400 mm.  Also remember to advance the pour in 'layers of about 300 mm or, for a diameter of less than the effective radius of operation of the vibrator, cast at a rate of 100 mm per minute continually raising the vibrator at that rate.

You can conduct the test by using:

1. Ultrasonic pulse velocity test

2. Electrical resistivity 

Dear

1- Nothing is mentioned  about the diameter of your steel tube, it should be more than 3 x maximum size of aggregate.

2- I agree that self compacting concrete is suitable for your case.

3- The use of external side vibration on the tube is beneficial. 

4- The use of moisture reducing additives with self compacting concrete is suitable.

dear ARBAB,

if the tube is not very large diameter and very long, you could use a entonoire is like pouring piles, deep foundation.

if the tube is not wide where there are problems. you can pour concrete into the pipe and rattled the outside of tube with a vibrator

I agree with Gordon Nefdt. and others with regard to SCC. I had experienced this problem of poor compaction earlier when low to medium slump concretes were used. Now I have switched over to SCC and there is no problem of segregation or honeycombing. You can cast few samples in similar plastic tubes and cut it open to see the quality of the hardened concrete. Selection of proper chemical admixtures is the only option to ensure high workability or flow and cohesion of the fresh concrete.

@Mohamad Jamali moghadam . The size of the beam is 100*200*3200 mm with 6mm thickness. 

Thanks for all the answers and good suggestions. Next time I will try to use SCC. This time I used Normal concrete with higher slump. I used external vibrator. So now how to check that weather concrete reached to all parts of the beam and is uniformly compacted or not. 

I have already discussed Mr. Abdual Faisal doubt this in my earlier answer. Try to cast one specimen with perplex mold or plastic mold and brake it open and observe the quality of concrete. Indirectly it can be found by density test to certain extent or by NDT. These test are relatively costlier..

Refer to my paper for SCC concrete

Conference Paper RTA Study on the Use of Self-Compacting Concrete

As I know that some codes require to pour the concrete from height less than 1.5m. This limit to ensure no segregation occur during the casting process.  

By Integrity test.

RMS NSW B80 includes a provision for test specimens for casting concrete.  This can be used to test any aspect of concrete casting - such as segregation in columns. Since the two aspects of column casting are filling and segregation, appropriate testing can be achieved by casting a test specimen in a split tube, demoulding and either coring or sawing to check for segregation.

RMS NSW B80 provides test methods for Self Compacting Concrete. If the concrete has the stability and segregation properties, but not quite the flow and form filling properties, it is likely to perform well with minimal compaction.

It is cheaper to do the testing on specimens than to check the real thing later.

http://www.rms.nsw.gov.au/business-industry/partners-suppliers/specifications/index.html

Thank you Gordon Chirgwin for sharing this reference.

Thanks Gordon  for sharing this specification