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Title |
Durability of Recycled Aggregate Concrete Incorporating Fly Ash
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Abstract |
This study presented the experimental results on the durability properties of recycled aggregate concrete incorporating fly ash. The main experimental variables were the substitution ratio of recycled aggregate and fly ash, where the substitution ratios of recycled aggregate were 0, 30, and 50%, and those of fly ash were 0, 10, 20, and 30%. The tests for evaluating compressive strength, freezing-thawing resistance, and drying shrinkage were conducted for each specimen. As a result, the compressive strength and the durability of the recycled aggregate concrete were compared from those of ordinary concrete. The followings were conclusion; The compressive strengths of recycled aggregate concrete were less than those of ordinary concrete by 5-10%. However, the durability factor of recycled aggregate concrete remained above 90% at the substitution ratio of 30%. The quality of recycled aggregate concrete were improved by substitution at the range of less that 20% of fly ash and 30% of recycled aggregate.
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