What is the free moisture content for the provided aggregate weights: SSD= 1350g, Dry= 1300g, Wet=1400g?

To determine the free moisture content of an aggregate, you can use the formula:

[ \text{Free moisture content (%)} = \frac{\text{Wet weight} - \text{SSD weight}}{\text{SSD weight}} \times 100 ]

In this situation, the SSD (Saturated Surface Dry) weight of the aggregate is 1350g, and the Wet weight is 1400g. By substituting these values into the formula:

1. Calculate the difference between the Wet weight and the SSD weight:

[

1400g - 1350g = 50g

]

2. Now, divide this difference by the SSD weight:

[

\frac{50g}{1350g} \approx 0.03704

]

3. Finally, to express this as a percentage, multiply by 100:

[

0.03704 \times 100 \approx 3.704%

]

Rounding this value gives approximately 3.70%. In the context of the provided options, this matches with the choice for 3.70%.

However, in your provided answer, 3.85%