In concrete compression test, normally 150mm x150mm x150mm concrete cube samples is used for testing. Why isn’t 100mm x100mm x100mm concrete cube samples used in the test instead of 150mmx150mmx150mm concrete cube samples?
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Basically, the force supplied by a concrete compression machine is a definite value. For normal concrete strength application, say below 50MPa, the stress produced by a 150mmx150mmx150mm cube is sufficient for the machine to crush the concrete sample. However, if the designed concrete strength is 100MPa, under the same force (about 2,000kN) supplied by the machine, the stress under a 150mmx150mmx150mm cube is not sufficient to crush the concrete cube. Therefore, 100mmx100mmx100mm concrete cubes are used instead to increase the applied stress to crush the concrete cubes.
For normal concrete strength, the cube size of 150mmx150mmx150mm is already sufficient for the crushing strength of the machine.
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
i have a question, What should be the minimum curing period of concrete if we use PPC cement?
2. Are the 28 days strength of PPC and OPC cement used concrete the same?
Answer of the equation regarding size of cube testing specimen 150×150x150mm and why not 100×100x100- I think answer given by (VC-Q-A-Method) by Vincent T. H. CHU. is not correct.
@ B S WERMA what is the right answer
how to incresed compresive srength in 7days.
please send me procedure of concrete mix propotions.
THANKING YOU,
how much strength should 100mm cube gain in 7 days?
compared to 150mm cube
what is the standard value for the crushing strenght of the concrete cubes
sir,im preparing concretecubes for iitmadras fest2012.i want the mix proportions for cubes with strength greaterthan 50megapascals.plz suggest me.i have to send the report quickly.and the cement content must be lessthan450kg/m3.awaiting for ur reply sir………….