Determination of concrete blocks to samples extracted from the block compressive strength correlation factor

ABSTRACT

This article results from the analysis of blocks produced in industry using a hydraulic vibro-press machine and samples extracted from the block itself, therefore with the same trace and vibration/compaction process. The blocks and samples were subjected to axial compression resistance tests and the results were correlated. This fact is unprecedented in the literature, as blocks manufactured in industry and samples cut from the block itself were used for analysis. By correlating the compressive strength values of blocks BR4 and BR 16 and their respective samples at 02, 07 and 28 days; it was found that at 2 days the resistance of the sample is comparatively greater than the resistance of the entire block. After 28 days, the resistance ratio tends to decrease, remaining around 2.0. Drawing a parallel with the blocks, it is believed that this behavior is expected, since the traction and compression ratio at younger ages is also higher and reduces as the days go by, remaining in the range of 2, due to the ratio of gross area and net area.

Keywords:
Masonry units; sample; resistance; correlation