What aspect of aggregate distribution is monitored during C136 analysis?

The analysis of aggregate distribution during test method C136 focuses specifically on particle size distribution. This process involves determining the gradation of aggregates—how different sizes of particles are distributed within a sample. The significance of assessing particle size distribution lies in its direct impact on the properties of concrete, including workability, strength, and durability.

Understanding the gradation helps engineers and technicians to ensure that the mix design meets the specifications for the intended use. Good gradation can lead to improved packing and reduced voids in the concrete mix, enhancing overall performance.

Moisture content distribution, temperature distribution, and color distribution are not the primary focus of C136 analysis. Moisture content influences the weight and consistency in mixing but is assessed through different methods. Temperature is more relevant to curing and mixing processes rather than particle size. Color distribution, while might be of interest in aesthetic finishes, does not contribute to the structural integrity or performance of the concrete, which is why it is not monitored in this context.