Which of the following is NOT a property of concrete?

Concrete is a widely used construction material known for its beneficial properties, which include workability, strength, and durability. Each of these properties plays a crucial role in how concrete performs in various construction applications.

Workability refers to how easily concrete can be mixed, placed, and finished. It is important for ensuring that the concrete can flow into forms and around reinforcement without segregation or air pockets.

Strength is a fundamental property of concrete, reflecting its load-bearing capacity. Concrete's compressive strength is particularly critical in supporting structures such as foundations, beams, and slabs.

Durability indicates how well concrete can withstand environmental factors over time, such as weather, chemicals, and mechanical wear. A durable concrete mix can resist cracking, scaling, and other forms of degradation, which ensures the longevity of the structure.

Cost-effectiveness, while an important consideration in construction projects, is not a fundamental property of concrete itself. Instead, it is a characteristic associated with the overall project management and budgeting aspects, influenced by materials, design, labor, and other factors. Hence, cost-effectiveness is not classified as a core property of concrete in the same manner that workability, strength, and durability are.