Cementitious Spray Dryer Ash-Tire Fiber Material for Maximizing Waste Diversion
Abstract
Spray dryer absorber (SDA) material, also known as spray dryer ash, is a byproduct of coal combustion and flue gas scrubbing processes that has self-cementing properties similar to those of class C fly ash. SDA material does not usually meet the existing standards for use as a pozzolan in Portland cement concrete due to its characteristically high sulfur content, and thus unlike fly ash, it is rarely put to beneficial use. This paper presents the results of a study with the objective of developing beneficial uses for SDA material in building materials when combined with tire fiber reinforcement originating from a recycling process. Specifically, spray dryer ash was investigated for use as the primary or even the sole binding component in a mortar or concrete. This study differs from previous research in that it focuses on very high contents of spray dryer ash (80 to 100 percent) in a hardened product. The overarching objective is to divert products that are normally sent to landfills and provide benefit to society in beneficial applications.
Keywords
Biology (General)
Medicine
Engineering (General). Civil engineering (General)
Computer applications to medicine. Medical informatics
Mineralogy
chemical engineering
economic growth, development, planning
mining engineering. metallurgy
regional economics. space in economics
english literature
american literature
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96825
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