Green concrete is defined as

Green concrete is defined as

• A. A type of concrete with high heat resistance
• B. Concrete with recycled aggregate
• C. Concrete with air entrainment
• D. Concrete that has been treated for water exposure

Answer: (D)

Green concrete here refers to concrete that has been treated to withstand water exposure. This means the concrete has received a protective treatment—such as a sealer, waterproofing coating, or hydrophobic impregnation—to reduce water penetration and shield it from moisture-related deterioration. Treating for water exposure helps prevent problems like corrosion of embedded steel, freeze–thaw damage, and efflorescence, especially in wet or damp environments. The other options describe properties or methods that are not about protecting against water exposure. High heat resistance is about thermal performance, recycled aggregate is about sustainability, and air entrainment is a mix design technique for durability and workability—not specifically a water-exposure treatment.

Green concrete here refers to concrete that has been treated to withstand water exposure. This means the concrete has received a protective treatment—such as a sealer, waterproofing coating, or hydrophobic impregnation—to reduce water penetration and shield it from moisture-related deterioration. Treating for water exposure helps prevent problems like corrosion of embedded steel, freeze–thaw damage, and efflorescence, especially in wet or damp environments.

The other options describe properties or methods that are not about protecting against water exposure. High heat resistance is about thermal performance, recycled aggregate is about sustainability, and air entrainment is a mix design technique for durability and workability—not specifically a water-exposure treatment.