Concrete Test report

Document Type:Thesis

Subject Area:Engineering

Document 1

In coming up with the desired design; there were 6 concrete cylinders that were placed in the compression machine slumps to be tested. The aimed is to determine whether the ultimate load is achieved for resisting the compressive sregth. 2 cylinders were first tested after a week when they were placed, 2 after a fortnight, and 2 after a month. The 3 point bending test was subjected to the ensuing concrete beams so that the determination of the modulus of the rapture is carried out. The testing was done at different intervals after one month. Portland cement association has proposed three features of concrete mixtures: Acceptable workability (RAO, SRINIVASA, and SUPRIYA, 23). Durability (hardened concrete) and Economy. In compensating the variance of concrete strength as a result of variations, batching plus mixing the concrete, the design used should have the requisite strength requirements for the concrete mix design coupled with the specific compressive strength; the allowable risk that produces concrete and the variability of concrete and the concrete so produced with an unacceptable strength should be known.

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In determining the strength the standard deviation of the strength of the concrete, batches of concrete are so made and then samples are taken in order to be tested (Mendez et al, 83). The American Core Institute (ACI) has given that the allowable risk should be10%, the concrete with less than 10% shows that the sample has a compressive strength that is specified (RAO, SRINIVASA, and SUPRIYA, 32). There are other minor factors though they play a major role in some aspects. They are: Temperature, end restraint, Size of the test specimen, and the moisture conditions Discussions It is paramount to note that compressive strength from the destructive tests of these specimens is not in any way having the same strength of the concrete as the actual building.

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