The Science Behind the 4 2 1 Rule for Concrete and Why It Matters
Concrete is the backbone of modern construction, used in everything from sidewalks to skyscrapers. But achieving strong, durable concrete requires the right mix of materials. The 4 2 1 rule for concrete—which stands for 4 parts coarse aggregate, 2 parts sand, and 1 part cement—is one of the most reliable guidelines known for creating high-quality […]