Does it have any relevance with M50 and C50 concrete strength? In terms of designing it, will using a normal concrete design method achieving 50MPa considered a B50 grade? Thanks in advance.
According to Eurocode 2 the concrete 50/60 has these properties:
Cylinder strength 50 MPa , Modulus of elasticity 37 GPa and Tensile strength 4.1 MPa
That did not answer the question. i know the definition of a C50/60 grade concrete, my question was about grade B50. More so on the meaning of B and what it represents.
The "B" can represent anything as long as you can't precisely refer to any standard of its definition. For example, from the year 1943 on we had in Germany a "B50" concrete with something about (only) 5 MPA...
Hi! If i understand you right, you mean the class of concrete strength "B" ("klas betona" in Russian).
The class of concrete "B" is the cubic (150x150x150 mm) strength in MPa, accepted with guaranteed security (confidence probability) of 0.95. This means that the class-established property is provided in at least 95 cases out of 100, and only in five cases it can be expected to be unsuccessful.
This grade used in USSR State Building Standard (if you interested, i can give you number and reference it document). This is an outdated standard, although for the construction of bridges in Ukraine (Ukrainian State Building Standard DBN V 2.3-14:2006 p. 56-61 in Ukrainian) we still use the class of concrete strength "B". However, in Civil Building we use standard Eurocode C /.
B50 (corresponds to C 40/50) - Rb= 25 MPa , Rb, ser= 36 MPa; Rbt= 1,4 MPa , Rbt, ser= 2,3 MPa (design characteristics of concrete for DBN V 2.3-14:2006 Compression / tension axial (prism strength) design / characteristic strength )
In the pdf file (Book full access in Ukrainian http://eprints.kname.edu.ua/42750/1/%D0%BF%D0%B4%D1%84_%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0_2014.pdf) you will find one page a comparison of the strength of concrete in class B and C. Data in MPa.
Most probably, here B stands for "beton". The word "beton" means concrete in French [also used in Russian standards, as some colleagues have already mentioned]. As it was mentioned above, the number 50 represents either cubic or cylindrical compression resistance in MPa. If you are referring to Russian standard, it is cubic resistance of specimen of (150x150x150)mm3 volume.
I totally agree with Luka, Oleksandar and Andreas. You should specify the code or specifications where you find this B in order to get the right definition.
Thank you all my dear colleagous
Thank you all for your answers. Unfortunately, i can't refer the letter B to any other code. The B50 concrete grade is taken from an article in 1957 by Kupfer H. & Gerstel K titled "Behaviour of concrete under biaxial stress". I wasn't able to find a full article about it so i was only able to read it through reviews. From there, I had the impression that the Kupfer's curve (failure curve in plane stress) can only be used if a B50 concrete grade is used. Hence the question to understand/define what B50 represent/mean? which code it is associated with.
From the names of the authors you mention I assume they are Germans, Austrians or Swiss, thus the "B" refers to "Beton" (= concrete) and "50" to the strength grade (in this case the compressive strength determined on cubes of 150mm edge length expressed in MPa).
Dear Mr Abdmassih Altawil, what is the source of the table you gave. It will give a better understanding
Please see this:
Chapter 2
General Characteristics of Concretes and Reinforced Concretes
Please see the Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement
A615/A615M – 09b
Regards
Sheikh Mohd Iqbal S. Zainal Abidin … Please check references below.. hope it will be helpful for you…
Regards…
https://www.springer.com/cda/content/document/cda_downloaddocument/9789400779075-c1.pdf?SGWID=0-0-45-1431211-p176308691
http://muroblocklaguna.com.mx/37227_%D9%82%D9%88%D8%A9-%D8%A7%D9%84%D8%AE%D8%B1%D8%B3%D8%A7%D9%86%D8%A9-c50-60.html
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