What is the pay factor for the #200 sieve?

The pay factor for the #200 sieve is based on its importance in determining the quality and suitability of aggregate materials in construction projects. The #200 sieve, which corresponds to openings of 0.075 millimeters (or 75 microns), measures the fineness of aggregates. This measurement is crucial because it influences various attributes of the concrete or asphalt mix, such as workability, strength, and durability.

A 10% pay factor reflects a standard adjustment used by FDOT to account for the performance of materials related to their particle size distribution, specifically focusing on the fine particles that can significantly affect the workability of the mix. This adjustment ensures that the materials used in the construction maintain a level of quality necessary for the intended engineering purpose, thus helping to uphold standards in infrastructure projects.

Other choices reflect different pay factor percentages that do not align with the established practices for assessing materials based on the #200 sieve. The firm establishment of certain thresholds, such as the 10% for the #200 sieve, allows for uniformity in quality control across various projects, ensuring that all contractors and materials suppliers understand the implications of aggregate grading on project outcomes.