Hydrofluoric acid (HF) is indeed a highly corrosive acid that can dissolve certain types of rocks and minerals, particularly those containing silicon dioxide (SiO2), such as quartz. However, its effectiveness in dissolving concrete, which typically contains a mixture of aggregates (such as gravel and sand), cement, and water, is limited. While hydrofluoric acid can attack the calcium silicate compounds found in cement, the reaction is generally slower and less efficient compared to its action on pure silica-based materials like quartz. Additionally, concrete often contains other components like limestone, which may not readily react with HF.


Moreover, the use of hydrofluoric acid for such purposes raises significant safety and environmental concerns. HF is extremely toxic and poses severe health hazards upon contact with skin, inhalation, or ingestion. It also requires specialized handling and disposal procedures due to its corrosive nature.

In practical terms, there are more effective and safer methods for breaking down rocks and concrete, such as mechanical methods (e.g., jackhammers, drills) or other chemical agents specifically designed for concrete dissolution. These methods are generally preferred for both safety and efficiency reasons.