What is one reason for conducting sieve analysis in accordance with C136?

Conducting a sieve analysis in accordance with C136 is primarily aimed at determining the grading of aggregates. This important test helps to identify the particle size distribution of an aggregate sample, which is critical in assessing whether the aggregate meets specifications for various construction applications. Grading affects the workability, strength, and durability of concrete, as well as its theoretical voids and spacing of the aggregate particles.

When aggregates are well-graded, they fill voids efficiently, which can lead to better concrete performance. The sieve analysis provides quantitative data about the proportions of different particle sizes within the sample, allowing engineers and technicians to evaluate the aggregate's suitability for specific construction needs. By understanding how the various sizes fit together, it's possible to optimize the mix design for concrete, ensuring that it will achieve the desired strength and application characteristics.