Hanna, K E; Morcous, G and Tadros, M K (2009) Effectiveness of class c fly ash on mitigating alkali-silica reaction in concrete pavement. International Journal of Construction Education and Research, 5(3), pp. 167-181. ISSN 1557-8771
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | alkali-silica reaction; concrete durability; concrete pavement; fly ash; reactive aggregate |
| Index terms: | fly ash, testing, slag, mitigation, deterioration, aggregate, sand, power plant, concrete durability, effectiveness, fine aggregate |
| Subjects: | waste management, performance management, infrastructure and transport systems, materials science, professional practice, building materials, material degradation and durability, financial risk |
| Topics: | Construction Materials, Cost Management, Sustainability, Engineering Principles, Quality Management |
| Descriptive scope: | 2 PC |
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