hswer Questions 1 10 points Please select which test is not

hswer Questions. 1) (10 points) Please select which test is not (a) Flexural Beam Blending Test (b) Semi-Circular Blending (SCB) Test (c) Hamburg Wheel Tracking Test which lest is not used to evaluate fatigue cracking resistance of (d) Texas Overlay Test Answer paction of the HMA is very important in the construction of a durable new WSDOT construction manual (2016) specifies that the asphalt mixture shall be From the point of view of the compacted to a minimum density of 91 percent of the theoretic maximum density. percent air voids, please discuss the reasons of this requirement

Solution

Answer (1)- (b) Semi Circular Blending (SCB) Test

Explanation- semi circular blending test is used for Asphalt-mixture property-values such as tensile strength, stress intensity factor .

Answer (2)- Air void present in pavement cause cracking in pavement and reduce the life of pavement.

The rule-of-thumb that emerges with respect to air void effects on pavement
performance is that each 1 percent increase in air voids (over a base level of about 7
percent) results in approximately a 10 percent loss in pavement life.

So compaction to minimum density of 91%of the theoretical maximum density results minimum air void.