What is the weight of sand and gravel expressed in PCF?

What is the weight of sand and gravel expressed in PCF?

• A. 94 PCF
• B. 100 PCF
• C. 144 PCF
• D. 150 PCF

Answer: (C)

The weight of sand and gravel is commonly expressed in pounds per cubic foot (PCF). The correct value, which is 144 PCF, reflects the average weight of a mixture of sand and gravel, considering their densities. Sand typically has a density between 90 and 100 PCF, while gravel can weigh anywhere from about 100 to 150 PCF, depending on its composition and moisture content. When combined, the average density tends to be around 144 PCF, which is often used in construction and civil engineering for calculations related to concrete mix designs and other applications involving these materials. Understanding this weight helps in estimating material requirements, understanding load-bearing capacities, and ensuring that structures are built to code. The other values are either too low or too high based on average densities.

The weight of sand and gravel is commonly expressed in pounds per cubic foot (PCF). The correct value, which is 144 PCF, reflects the average weight of a mixture of sand and gravel, considering their densities. Sand typically has a density between 90 and 100 PCF, while gravel can weigh anywhere from about 100 to 150 PCF, depending on its composition and moisture content.

When combined, the average density tends to be around 144 PCF, which is often used in construction and civil engineering for calculations related to concrete mix designs and other applications involving these materials. Understanding this weight helps in estimating material requirements, understanding load-bearing capacities, and ensuring that structures are built to code.

The other values are either too low or too high based on average densities.