CCEER-00-6: High Performance Concrete Using Nevada Aggregates
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Authors
Will, Jeremy J.
Sanders, David H.
Issue Date
5/1/2000
Type
Report
Language
Keywords
CCEER
Alternative Title
Abstract
The performance of concrete bridge decks depends on basic materials as well as external
factors such as exposure conditions. The main objective of this research project is to develop
concrete performance specifications for Nevada and determine measures which might be used to
make concrete which passes those requirements. In order to do this, a series of concrete mix
designs were developed and evaluated for their suitability to be used in Northern Nevada bridge
decks and other structures exposed to harsh environments. In this research program, a total of 37
mix designs were completed using various combinations of three coarse aggregate sources, two
Type UJI cement sources, two Class F fly ash sources, and four rates of cerneiit replacemelit with
fly ash. Testing of trial batches made from these materials yields data which shows how different
materials and combinations of materials affect the final performance of the concrete.
Laboratory testing based on tests suggested by FHWA's High-Performance Concrete
Committee was used to evaluate the perforinance of each trial batch. The test program consists
of chloride ion penetration, scaling resistance, shrinkage, compressive strength, modulus of
elasticity, alkali-silica reactivity, and freezelthaw durability.
The results of trial batch testing show that different raw materials investigated have a
significant impact on long-term performance and durability. In order to optimize concrete for the
different effects of the raw materials and their proportions, NDOT should adopt a performd~ice
based specification system for concrete. As a part of this study, a proposed performance based
specification system has been developed for NDOT.
Description
Report No. CCEER-00-6
Citation
Publisher
License
In Copyright