Advertisements   Division Home   Bid Results   Bid Tabs   Ad Report   VDOT Forms   Login Or Create Account    
Project Info
Order Number UPC State Project Number Last Date to Post Questions
271 126390 PM2P-060-F25, P401 1/17/2025
Search Questions
Search
Question Type  
    Export Q&A    
Question List
Subject: Test Lane 5 Type: Proposal
Question Date: 12/17/2024 11:46:15 AM
On test lane 5, what is the purpose of placing 6" of new 21A stone and then excavating 4" of that new stone 2 weeks later? Also, is there a time requirement between excavation of the 4" of stone and placement of the asphalt?  
Answer   Date: 12/19/2024 2:07:42 PM
Test Lane 5 currently has 6" of asphalt that needs to be fully removed to establish a similar aggregate base to Lane 6 prior to paving. To avoid inconsistencies that could affect research, Lane 5 should have 6" asphalt removed and 6" of aggregate base placed, compacted, and density verified prior to milling and paving for the 4" asphalt layers.  The 2 week period is intended to provide adequate time to ensure proper, adequate, and verified density of the subbase aggregate layer prior to constructing Lanes 5 and 6 the same way at the time of paving. There is not a time limit or requirement between excavation/milling of the 4" in Lanes 5 and 6 and paving other than allowing adequate time (1 hour) for rolling of the exposed aggregate and placement of testing sensors prior to paving.  It is expected that excavation/milling 4" and asphalt placement should occur in the same day.  If excavation/milling of 4" and asphalt placement do not occur in the same day and the exposed subbase is allowed to sit and be saturated prior to paving, paving could be delayed until the subbase aggregate achieves an acceptable moisture content.  
 
Question Date: 12/19/2024 3:26:43 PM
Is the density testing of the subbase aggregate layer in test lane 5 over the two week period the responsibility of the contractor or will VDOT/VTTI be doing all of the subbase testing?  
Answer   Date: 12/20/2024 8:16:07 AM
The Department will conduct nuclear gauge density readings on subbase stone in accordance with section 308.03 of the specifications.  
 

Displaying questions 1 - 1 (of 1)
Page: 1 First Previous Next Last 

Construction Advertisement Bulletin Board (CABB)
Update Profile
CABB v2.0 © 2008 Virginia Department of Transportation 1/9/2025 12:03:48 PM 2008