Which category includes specific heat, thermal conductivity, and coefficient of expansion?

Which category includes specific heat, thermal conductivity, and coefficient of expansion?

• A. Deleterious Materials
• B. Soundness
• C. Thermal Properties of Aggregate
• D. Crushing Value Test

Answer: (C)

These properties test how a material responds to temperature changes, so they belong to the thermal properties of aggregate. Specific heat measures how much energy is needed to raise the material’s temperature, thermal conductivity describes how easily heat flows through it, and the coefficient of thermal expansion indicates how much the material expands or contracts with temperature. Collecting these together makes sense because they all describe heat-related behavior, not how strong the material is, whether it contains impurities, or how it withstands weathering. The other categories focus on durability, weathering resistance, or mechanical strength, which are not about heat response.

These properties test how a material responds to temperature changes, so they belong to the thermal properties of aggregate. Specific heat measures how much energy is needed to raise the material’s temperature, thermal conductivity describes how easily heat flows through it, and the coefficient of thermal expansion indicates how much the material expands or contracts with temperature. Collecting these together makes sense because they all describe heat-related behavior, not how strong the material is, whether it contains impurities, or how it withstands weathering. The other categories focus on durability, weathering resistance, or mechanical strength, which are not about heat response.