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

• A. 3.75%
• B. 3.70%
• C. 4.00%
• D. 3.85%

Answer: (B)

To determine the free moisture content of the aggregate, the formula used is:

[ \text{Free Moisture Content (%)} = \frac{\text{Weight of Wet Aggregate} - \text{Weight of Dry Aggregate}}{\text{Weight of Dry Aggregate}} \times 100 ]

In this case, the given weights are:

• Weight of Wet Aggregate = 1400g

• Weight of Dry Aggregate = 1300g

First, we calculate the difference between the wet weight and the dry weight:

[ 1400g - 1300g = 100g ]

Next, we can plug this value into the formula:

[ \text{Free Moisture Content (%)} = \frac{100g}{1300g} \times 100 ]

Calculating the ratio:

[ \frac{100}{1300} = 0.076923 ]

Now, multiply by 100 to convert it into a percentage:

[ 0.076923 \times 100 = 7.6923% ]

This percentage is not the free moisture content directly; we need to look specifically for the decimal equivalent related to what is typically provided in the context of the options listed (often