A fine aggregate mechanical splitter must have a minimum of how many chutes?

A fine aggregate mechanical splitter must have a minimum of 12 chutes to ensure proper division of the sample into smaller, representative portions. Having this number of chutes provides sufficient separation to consistently achieve an accurate split of the material. This is essential for obtaining uniform samples that ensure the testing results are reliable and representative of the overall aggregate in use. Using an adequate number of chutes helps reduce the chance of variability in the sample, which can arise from uneven distribution or segregation.

When fewer chutes are used, it could lead to higher variability in the samples taken, potentially skewing the testing outcomes. Hence, the use of 12 chutes not only facilitates an effective division of fine aggregates but also adheres to the standards required for accurate testing as laid out in aggregate testing protocols.