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한국건축시공학회 / v.8, no.5, 2008년, pp.59-65 
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플라이애시의 활성도지수 평가에 관한 기초적 연구
( Fundamental Study on Evaluation method of Activity Factor of Fly Ash ) |
| 박상준; (주)대우건설 기술연구원 건축연구팀;
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| 초 록 |
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| In the evaluation method of KS on the activity factor of fly ash, same amount of cement should be replaced with fly ash. Therefore, contradictory effects on concrete strength exist, i. e. strength decease due to low content of cement and strength increase of strength due to filling-pore-function of fly ash. European Committee for Standardization (CEN) specifies the method 1 to 4. adding fly ash without reducing the content of cement, for the evaluation method on activity factor of fly ash. This study investigates the applicability of the method 2 of CEN to mix design of concrete. The followings are derived ; There is a key ratio of f)y ash mixing which enhances the incremental ratio of mixing water to improve fluidity of mortar. The incremental ratio of mixing water is maximized about 11% ratio of fly ash mixing. Compressive strength most slightly increases at that ratio of fly ash mixing. Activity factor of fly ash increases as water-cement ratio becomes low and contents of fly ash becomes high. Moreover, quality of fly ash and condition of mix design affect the applicable amount of fly ash and available range of water-cement ratio. However, this method has some problems for practical purpose because activity factors of fly ash for some cases are over 1.0. Further research should be conducted to develop more useful method of evaluating activity factor of fly ash. |
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| 키워드 |
| 플라이애시;활성도지수;배합수 증가율;압축강도 감소율;Fly ash;Activity factor;Incremental ratio of mixing water;Reduction ratio of compressive strength; |
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한국건축시공학회지 / v.8, no.5, 2008년, pp.59-65
한국건축시공학회
ISSN : 1598-2033
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200835054212888)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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