Which of the following descriptions is right? A: Asphalt with lower viscosity helps to increase the shear strength of asphalt mixture. B: The lower asphalt content, the higher shear strength of asphalt mixture is. C: The higher asphalt content, the higher shear strength of asphalt mixture is. D: Aggregates with dense framework structure helps to increase the shear strength of asphalt mixture.

Which of the following is NOT considered as a property of asphalt concrete? A: Thermal cracking resistance B: Tensile strength C: Compressive strength D: Fatigue crack resistance

The effective volume of aggregate is () A: Volume of solid aggregate B: volume of solid aggregate and surface voids C: volume of solid aggregate and surface voids not filled with asphalt D: volume of solid aggregate, surface voids and closed voids