Computing the compressive strength of concrete cubes at (7 or 28 days)‎ by using a multi forms program

الملخص EN

This search includes developing a multi forms program to estimate the compressive strength for cubes of concrete (fcu) ; which are tested in any age from ( 3 – 90 days) and putted back to (7 or 28 days), which are the ages used to estimate the compressive strength of concrete for construction and showing if the samples are conformable according to the Iraqi code (1987) for three specific designed compressive strength (C17, C21 and C25).

The style and mechanism for computing the required compressive strength has been developed by multi forms program which depends on a part of dialog for (compressive strength of cubes (150 mm (6 in)) ,different (w/c) ratios and different ages, storage under moist conditions and the cement used is the ordinary Portland cement) which is established by [Neville].Where the ages in the dialog were (3 days to 20 years) but the part is used is (3 to 90 days).

To represent the dialog mathematically it is used three equations, each equation represent a specific (w / c) ratio, (0.40, 0.53 and 0.71).

The performed program has been developed by using the (VISUAL BASIC) which is one of the recent program languages.

The language of (VISUAL BASIC) is used to advantage from its property to treat within windows environment which make it easy for any user.

The results of the multi forms program have been compared with real results for measured cubes, and it is gave a good agreement, which means that the program building is correct because it depends on the dialog of [Neville] which is built on actual data.