General Contractor Practice Exam

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What does the term "popcorn" refer to in construction materials?

Compressed concrete mix
Open graded asphalt concrete
Polished marble finish
Reinforced steel bars

The correct answer is: Open graded asphalt concrete

The term "popcorn" in construction materials refers to an open graded asphalt concrete mixture. This type of asphalt has a specific aggregate structure that allows for better drainage and reduces the risk of hydroplaning on roads. The "popcorn" term comes from the appearance of the aggregate, which can resemble popped corn due to its texture and the size of the particles used. Open graded asphalt concrete is designed to allow water to flow through it, which leads to improved skid resistance and a reduction in the pooling of water on the roadway surface. This is particularly beneficial in regions that experience heavy rainfall or where drainage is a significant concern. In contrast, the other options represent distinctly different materials and processes in construction. Compressed concrete mix involves a different specification and application method, polished marble relates to finishing techniques for stone surfaces, and reinforced steel bars are used for strengthening concrete in structural applications. Therefore, understanding the specific attributes and applications of open graded asphalt concrete helps clarify why "popcorn" is correctly identified with that material.