Abstract
Throughout the state of Nebraska, Portland cement concrete pavements (PCCP) use Platte River sand and gravel exclusively as a fine aggregate. It has been well established that this aggregate is a reactive aggregate that can potentially lead to alkali-silica reaction (ASR). Fly ash has been used as an economic and effective way for ASR mitigation. However, Class C fly ash produced by Nebraska power plants has been identified as a major contributor to the premature deterioration of PCCP. This paper presents the experimental work performed to assess the effect of using Class C fly ash in PCCP to control ASR. The ASTM C 1567 test method was adopted to evaluate the expansion in 16 different mixes that contain different proportions of Class C fly ash, Class F fly ash, slag, and cement. Four mixes have been chosen for overall performance testing based on the ASTM C 1567 test results and material cost. These mixes, which contain at least 15% Class C fly ash in addition to Class F fly ash and/or slag, showed better performance over the current standard mix.
Original language | English (US) |
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Pages (from-to) | 167-181 |
Number of pages | 15 |
Journal | International Journal of Construction Education and Research |
Volume | 5 |
Issue number | 3 |
DOIs | |
State | Published - Jul 2009 |
Keywords
- Alkali-silica reaction
- Concrete durability
- Concrete pavement
- Fly ash
- Reactive aggregate
ASJC Scopus subject areas
- Building and Construction
- Education