The tensile strength of concrete is used in combined-stress design. In normal-weight, normal-density concrete the tensile strength can be found from

Advertisements

### Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.
If you have a query, you can **ask a question here**.

I have a question about concrete strength.

I have a piece of construction equipment that I would like to put into a warehouse.

The equipment has a ground pressure of 11.4 psi and a ground contact area of

3173 sq. in. with a total weight of 36,150 lbs.

If I did the calculations correct a 6″ thick concrete slab should be able

to support this without a problem of cracking since, from the chart I read a 6″ thick

slab should be able to support 306 psi. The floor has a minimum thickness

of 6″ and in some places would be as thick as 12″. Could someone let me know if I

calculated this right???

Thank you,

Phil

Dear sir,

i have seen your website. it is very useful for me, i want know

about mix design and how to prepare mix design.

pls send us the earliest

Dear sir,

i have seen your website, it is very useful for me since i m a civil contractor undertaking repairs & restoration jobs in mumbai, i want know about mix design and how to prepare mix design & the bar chart.

pls send us the earliest.

regards.

dear sir i am alagar samy from tamil nadu . i saw ur website its very useful

website not only me for all civil engineers.

dear sir,

ur website is very usefull for teh civil enigineers,i want to know the compressive strength

for for the mix m10,15,20,25,30,35, for 3days,7,28,91days,

please send this as early as possible

shivappa

Dear sir,

can you please explain in brief “why don’t we consider tensile strength of concrete while designing?”& “why there is a assumption in code to ignore tensile strength of concrete?”

I have asked so many experts about this but they were unable to resolve my query.

Please explain as early as possible.

Your early response will very much be appreciated & praised..

thanks & regards

Pritam

First of all it is very low so it is negligable. Second; some time, the concrete due to curing will have minor cracks which will reduce it even further.

Dear sir,

could you please specify source of the axpression above for tensile strength of concrete. Thx in advance. Nataly.

dear sir,

ur website is very usefull for teh civil enigineers,i want to know the compressive strength

for for the mix m10,15,20,25,30,35, for 3days,7,28,91days,

please send this as early as possible

ravi

Hi, your information are really helpful. I will like to know the tensile and compressive strength concrete. Thank you

concrete’s strengths will depend on many factors (water/cement ratio, type of agragets, cement amont/m3, .. strength additives such as slag, ..etc) The stregth are normally designed by materials engineer just like any other engineering design: can go up or down by adjusting the parameters. You should aslo control your yield to be within the range.

Ur website is very use full for civil engineers,I want to know the tensile strength for M30 for 3days,7& 28,

please send this as early as possible

Need info,please. Bidding to build a truckshop….40x90x14…….to be used to park crude oil transports usually loaded and also packed with ice and snow in wintertime.These units are 85,000# GVW.

Need to know if concrete thicker than 5 1/2 inches is necessary.

Methinks a 6″ slab would be better and perhaps 8″ alot better.

I may be wrong though. Please advise. Thank you.

“Ship”

How would i know the true tensile strength of the concrete? i have a problem in school. I still have no topic for my research. Someone help me pls.

i would like to deal with the tensile strength of the concrete, as my proposal. Having tests and experiments to identify its tensile strength and modulus of elasticity..

jonas.

Dear Sir,

Greetings!

I would like to know on how to design M70, M75 and M80 mix concrete. please give me also a procedure or steps in designing mix concrete.

Please give me a feedback or mail regarding the above query early as possible.

Thank you very much.

Best regards,

Charles

dear sir,i hv a problem of slab r/f, i.e beam size 450x250mm and slab span of 3550x2500mm c/c and thickness 125mm.

and of restrain slab design of two

layer, about 200c/c of 8dia bar. sir how to cal. the quantity of r/f of this particular slab.

sir please mail me with solution.will be thankful to you for your kind reflection

thank you very much,

adam

sir please forward the degeree of control of M30,M35.please forward the design mix of M30

sir i need the mix design for M80 grade of concrete. mayi please get it as early as possible.

Dear Sir,

We manufacture concrete pavers and we were wondering what steps to take to increase our tensile strength? If anyone knows what I can do to help increase the tensile strength of my pavers

Thank you.

sir i need the mix design for M70 grade of High performance concrete using super plasticizer. mayi please get it as early as possible.

We are trying to use 100mm cubes for testing concrete strength.When done trial test we found that the ratio of 150mm cube strength to 100mm cube strength is varies very much(when plotted R2=0.1) and is about 0.88 to 0.91 for C40 / 50 concrete.

Is there anyone else has done any trial to find the coerrelation.Dutch standard NEN 5950 allowas a correction facor of 0.91 for 100mm cubes. Please comment. Thanks

sir, your website is good for searching information and help a lot of people. i just want to know what is uniaxial tensile strength for concrete? got any formula for me to calculate?