What is one of the main purposes of conducting test C136?

Test C136, also known as the Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates, is primarily utilized to determine the grading of materials. This test involves passing a sample of aggregate through a series of sieves with different mesh sizes. By analyzing the amount of material retained on each sieve, one can establish the particle size distribution of the aggregate.

Understanding the grading of aggregates is crucial in construction because it affects the properties of concrete and asphalt. Proper grading ensures that the mix achieves the desired strength, workability, and durability. The results from this test help engineers and material technicians make informed decisions about the suitability of aggregates for specific applications, ensuring quality and performance standards are met.

While moisture content, chemical properties of soil, and durability of aggregates are important factors in material testing, the focus of Test C136 is specifically on the grading aspect, making it essential for assessing how well aggregates will perform in construction applications.