Online calculator for statistical quality control of concrete| mean and standard deviation

Statistical quality control of concrete

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Materials, mixing, placing and curing affects the compressive strength of concrete. The better understanding of properties leads to production of good quality of concrete. By using mean, standard deviation and coefficient of variation gives good picture of variation of quality of concrete. This page helps in design of concrete by trial mix. The trial mix data is fed into table to calculate above mentioned statistical quantities. Edit the 20 compression strength data by clicking on data.if data is not present type zero in compressive strength column.

Specimen No.	Compressive strength MPa.	Deviation	Square of deviation
1.	43
2.	48
3.	40
4.	38
5.	36
6.	39
7.	42
8.	37
9.	35
10.	39
11.	41
12.	49
13.	46
14.	36
15.	38
16.	32
17.	39
18.	41
19.	40
20.	45

In this page, twenty compressive strength of cube is placed in table. By clicking on calculate button, it calculates deviation and square of deviation values. Mean, standard deviation and coefficient of variation are exhibited in output box. This table is online editable, where specimen number and compressive strength of concrete can be changed. Other values are automatically calculated by the page itself.Click on the calculate to button to show statistical quantities.

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Average strength of concrete =

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Standard deviation of concrete =

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Coefficient of variation of concrete =

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We need to click on plot button to draw graph of compressive strength versus specimen number. Cube specimen number is selected for X-axis and compressive strength is chosen for Y-axis. From this graph variation of compressive strength can visualized.

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Graph of Compression strength of specimens.

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