Concrete Mixing: The 1-2-3 Rule

How many shovels of sand are needed to mix with 15 shovels of Portland cement?

A) 5 shovels of sand.

B) 10 shovels of sand.

C) 15 shovels of sand.

D) 20 shovels of sand.

Answer:

The 1-2-3 rule in concrete mixing states that for every 1 part of cement, you need 2 parts of sand, and 3 parts of gravel or crushed stone. Using this rule, with 15 shovels of Portland cement, you would need 10 shovels of sand.

The 1-2-3 rule in concrete mixing is a simple guideline to determine the proportions of cement, sand, and gravel needed for a concrete mix. According to this rule, for every 1 part of cement, you should use 2 parts of sand, and 3 parts of gravel or crushed stone.

In this scenario, if you have 15 shovels of Portland cement, you would need to use 2 times that amount for sand. So, 15 x 2 = 30 shovels of sand would be required to mix with the cement.

Therefore, the correct answer to the question is B) 10 shovels of sand. By following the 1-2-3 rule, you can ensure the proper proportions in your concrete mix for optimal results.