You can use Karsten tubes:

http://www.tqc.eu/en/products/article/karsten-tube-penetration-test

or Porositester:

http://www.beratest.com/catalog/english/pdf/0098.pdf

I used something like Karsten in researches:

https://www.researchgate.net/publication/268218863_Sorpcyjno_betonu_w_obcionym_elemencie_konstrukcji

Regards, Wojciech Kubissa

Conference Paper Sorpcyjność betonu w obciążonym elemencie konstrukcji

Please find an other possibility:

http://germann.org/wp-content/uploads/2014/05/GWT.pdf

If acceptable (price?) Is the use of the measuring apparatus I suggest also:

http://www.amphorandt.com/autoclam.html#Technical

Regards, Wojciech Kubissa

:-) The simplest way still is the karsten tube :-)

use cylinder with measurement (open in both end) & stop watch. Pour the water inside the cylinder and start counting the time as same time measure the water reduction. Then calculate the flow rate and etc.

Dear Mr. Azman M,

Is this not the karsten tube? :-) :-) And the water level will not change so rapidly, as a stop watch would be necessary........ etc. And how do you fix a simple cylinder on a vertical surface if you also need water pressure?? There are quite many questions regarding your kind advize.

 Dear Mr Tamas Simon

The concept almost similar with karsten tube but it apply on the horizontal surface not vertical surface. It also depend on site condition and few step of procedure must to be followed. It cannot apply on the dense materials, it appropriate to porous & high void materials 

Dear Magdalena,

I do not wish to argue, but it seems to me Rilem method uses karsten tubes for the measurement. So what is Rilem tube???

Dear Tamás,

These tubes are called exchangeable Karsten / RILEM. Karsten is the name of the equipment, RILEM test methods. In my opinion, their disadvantage is too small diameters and surface of water penetration. The obtained result is different than in the area of 100 cm ^ 2, and more. I will soon publish an article on this topic. I attach one of the charts which showed the dependence of sorptivity on the surface with the unidirectional (Sjd) and multidirectional (Swd) flow. On the image measuring stand.

Best Regards,

Wojtek Kubissa

Dear Wojciech,

I only tried to be not too sarchastic :-).

I very much agree with your opinion regarding the small surface, since the influence of bigger aggregate particles is too big in water penetration/absorbance. I presume, only in case of mortars may be obtained really reliable data by the karsten tubes. This is because in case of ordinary concrete big aggregate particle would block water penetration, while in case of porous, light weight aggregates the aggregate porosity may have an opposite effect if the aggregate is not coated.

By the way, how could you ensure uni/multidirectional flows during your experiments?

Regards

Tamás

Dear Tamás,

I used similar pipes in 1996. I think they were invented at a similar time in Poland, but not as widespread as the name of Karsten. For unidirectional flow I use the method of mass. For use multidirectional flow volumetric method - pipes with different diameters up to 100 mm. Perhaps it is not perfectly consistent with the theory but after cracking seen water penetration range corresponding to the assumed.

We also tried to measure using volumetric method with unidirectional flow with the same diameter of the measuring apparatus and the sample.

Best Regards, WojtekK