This research study, sponsored by the Federal Highway Administration, summarizes the field performance of eight high-early-strength (HES)
concrete patches between 1994 and 1998. The patches were constructed under the Strategic Highway Research Program (SHRP) between June
1991 and July 1992 and were located in 5 States (Arkansas, Illinois, Nebraska, New York, and North Carolina) using existing State construction
practices. The patches were constructed mainly with Type III cement, four different types of coarse aggregate, and three different types of fine
aggregate. Similar types of air entraining admixtures, water reducers, and set accelerators were used at all except the North Carolina site. The
patches were located in areas with varying environmental and traffic conditions. The performance criterion of interest was durability. Durability of
the HES concrete was quantified over a period of 7 years using various indicators including compressive strength, static elastic modulus, rapid
chloride permeability, and asphalt concrete (AC) impedance. The HES patches were also examined visually to locate any material- or durability-
related distresses. This report discusses in detail the effects of climate and material properties on the HES concrete durability.