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What is the difference between compressive strength and target strength?
Wiki User
∙ 13y ago
Compressive strength of concrete is defined as the concrete cube of 150 mm x 150 mm x 150 mm with specified proportion with 28 days curing.
Target mean strength - In order that not more than the specified proportion of test results are likely to fall below the characteristic strength, the concrete mix has to be designed for a somewhat higher target average compressive strength (fck).
__
fck = fck + t * s
where ___
fck is target average compressive strength at 28 days,
fck is a characteristic compressive strength at 28 days and
s standard deviation
t a statistic, depending upon the accepted proportion of low results and the number of tests.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agocompressive strength is the actual strength of material and splitting tensile strength is result obtained from splitting hammer
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35N/mm2 the above answer is terrible. at 14 days there is no guarantee of what the strength will be, as strength gain is rapid with pue OP it will tend t be greater than 50% of the target characteristic strength; however, with any pozzolans in the mix (e.g. PFA/GGBA) the strength gain over time is slower and can be espected to achieve greater strengths than that of pure OPC the question is too vague to answer. the mix design is pivotal in calculating strength
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