PIC Pavement Joints & Longitudinal Seam Construction 3

Question 1

A notched wedge joint is designed primarily to:

Accepted Answer

Provide a tapered, stepped edge profile that improves compaction and density at the joint

Answer

Create a full-depth vertical butt face at every paving pass

Answer

Allow traffic to drive over the joint edge before adjacent lane paving

Answer

Eliminate the need for tack coat by mechanically interlocking the two lanes

Question 2

The wedge taper of a notched wedge joint is typically constructed with a horizontal-to-vertical slope of approximately:

Accepted Answer

12:1 (horizontal to vertical)

Answer

2:1 (horizontal to vertical)

Answer

6:1 (horizontal to vertical)

Answer

50:1 (horizontal to vertical)

Question 3

The vertical 'notch' at the bottom of a notched wedge joint is typically cut to a depth of approximately:

Accepted Answer

One-third to one-half of the compacted lift thickness

Answer

The full compacted lift thickness

Answer

One-quarter inch regardless of lift thickness

Answer

Notch depth is not specified — it varies freely by contractor

Question 4

During notched wedge joint construction, the notch-cutting attachment is typically operated:

Accepted Answer

Simultaneously with paving by the paver operator or paving crew as part of the paver setup

Answer

By the nuclear gauge technician as a separate independent step

Answer

Only by the project engineer during a dedicated pre-paving operation

Answer

By an independent third-party inspector before the paver arrives

Question 5

After the adjacent lane is placed against a notched wedge joint, where should the inspector focus density testing efforts?

Accepted Answer

At the joint area and free edge, which are most vulnerable to under-compaction

Answer

Only at the centerline of the new lane, away from the joint

Answer

At the center of the mat where the heaviest roller passes occur

Answer

Density testing at notched wedge joints is not required by standard specifications

Question 6

What structural advantage does a notched wedge joint have over a standard cold vertical butt joint?

Accepted Answer

It provides greater bonded contact surface area and distributes traffic stress over a larger interface

Answer

It is faster to construct in the field, reducing project duration

Answer

It completely eliminates the need for tack coat at the joint face

Answer

It allows for unrestrained thermal expansion without cracking at the seam

Question 7

When inspecting a completed longitudinal joint, which characteristic is the most critical indicator of long-term joint quality?

Accepted Answer

Density and smoothness achieved at the joint relative to specification requirements

Answer

Color uniformity of the asphalt mix at the seam

Answer

Aggregate surface texture visible at the joint

Answer

Straightness of the joint line as viewed from above