thumb|A single concrete block, as used for construction
Concrete is a building material made by mixing cement, water, and aggregates like sand and gravel, which hardens into a solid mass. It matters because it's one of the most widely used construction materials for buildings, roads, and infrastructure projects around the world.
AI-generated from the Wikipedia summary — may contain errors.
thumb|A single concrete block, as used for construction
Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid. It is the second-most-used substance (after water), the most widely used building material, and the most-manufactured material in the world.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).