Contraction joints are used between big slabs of concrete or asphalt during road construction. These joints prevent roads from cracking during large changes in temperature. Physical properties of some common materials are given in the table. Material
Melting Point
(° Celsius)
Thermal Coefficient*
(10 Superscript negative 6 Baseline per ° Celsius at 20 ° Celsius)
Density
(grams per centimeter cubed)
aluminum 660 23 2. 70 iron 1538 11 7. 87 rubber 128 77 0. 92 silicon 1410 3 0. 97
*The thermal coefficient represents the increase in volume of the material when the temperature increases by one degree. Question
Based on the data, which material is ,begin emphasis,most,end emphasis, likely to be used as a contraction joint?
Answer options with 4 options
A. Aluminum
B. Iron
C. Rubber
D. Silicon