Visual identification is easier, but it is not a reliable method to quantify the degree of segregation.

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (A)

Visual cues can show that segregation is present, but they don’t provide a reliable measure of how much the mix has segregated. To quantify the degree of segregation, you need objective testing—taking representative samples across the mat and performing gradation analyses (and related tests) to obtain numerical data. Visual inspection is quick and useful for spotting problems, but its results are qualitative and can be influenced by lighting, surface conditions, and observer judgment, so it cannot be trusted for precise quantification.