|
Title |
Evaluation of Durability Performance of Fly Ash Blended Concrete due to Fly Ash Replacement with Tire Derived Fuel Ash
|
|
Authors |
권성준(Seung-Jun Kwon) ; 윤용식(Yong-Sik Yoon) ; 박상민(Sang-Min Park) ; 김혁중(Hyeok-Jung Kim) |
|
DOI |
https://doi.org/10.4334/JKCI.2016.28.6.647 |
|
Keywords |
TDFA ; 내구성 ; 플라이애쉬 ; 콘크리트 ; 탄산화 ; 염화물 확산 ; 공극률 TDFA ; durability ; fly ash ; concrete ; carbonation ; chloride diffusion ; porosity |
|
Abstract |
In the paper, durability performance in FA (Fly Ash) blended concrete is evaluated considering replacement of FA with TDFA (Tire Derived Fuel Ash) from 3.0% to 12%. TDFA is a byproduct from combustion process in thermal power plant, where chopped rubber is mixed for boiling efficiency. This is the 1st study on application of TDFA to concrete as mineral admixture. For the work, concrete samples containing 0.5 of w/b (water to binder) ratio and 20% replacement ratio of FA are prepared. With replacing FA with TDFA to 12%, durability performance is evaluated regarding compressive strength, carbonation, chloride diffusion, and porosity. The results of compressive strength, carbonation, and porosity tests show reasonable improvement in durability performance to 12% replacement of TDFA. In particular, clear decreasing diffusion coefficient is observed with increasing TDFA replacement due to its packing effect. Concrete containing TDFA can be effective for durability improvement when workability is satisfied in mixing stage.
|