United States Department of Transportation
i
Long-life slab replacement concrete.
-
2015-03-01
-
[PDF-14.77 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:This research was initiated following reports of high incidence of cracking on FDOT concrete pavement replacement
slab projects. Field slabs were instrumented for data acquisition from high-early-strength concrete pavement
replacement slabs placed on projects funded by the Florida Department of Transportation (FDOT). Data were collected
for three slabs located in Jacksonville, Florida, and Gainesville, Florida. A battery of laboratory tests was
simultaneously conducted on the FDOT-approved concrete mixture designs used in the instrumented field slabs in
addition to mixtures with variable chloride-based accelerator dosage. Temperature and strain data, as well as physical
and thermal data, were acquired from slabs from the construction projects. The physical and thermal data acquired
from the field were used for modeling description and verification. Subsequent to the field testing and data acquisition,
the slabs were inspected for the presence of cracking. Laboratory testing included as-received materials
characterization, heat of hydration measurements using isothermal and semi-adiabatic calorimetry for temperature rise
assessment, and strength maturity curves for strength assessment. Using ConcreteWorks and HIPERPAV III, the
findings indicated that adherence to the approved mixture design is critical. High placement temperatures and concrete
placement during the day increased concrete cracking potential. Field additions of accelerator in excess of the approved
mixture design were also found to increase the cracking potential.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
