http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초기강도 향상 혼화재가 플라이애시 치환 콘크리트의 공학적 특성에 미치는 영향
이주선(Lee Ju-Sun),박천진(Park Chen-Jin),한민철(Han Min Cheol),한천구(Han Cheon-Goo) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Engineering characteristics of FA substituted concrete were analyzed in this study using admixture of FC and RP for the purpose of improving initial strength of FA concrete. First in fresh concrete, slump and air capacity satisfied objective range in all mixes of the mix design. Setting time was significantly reduced in comparison to FA substituted concrete by using performance improvement admixture. The time reached the level of plain mix under low temperature condition. As a characteristic of hardened concrete, compressive strength was high in the initial age and age of 28 days when performance improvement admixture was used in comparison to FA mix. Especially at high temperature, strength was similar to the plain mix. Satisfactory improvement in strength was verified. In case of rate of change in length from drying shrinkage, use of performance improvement admixture showed no large difference from FA mix. Synthesizing the above results, use of performance improvement admixture composed of 30% FA, FC (15% of mix) and RP (5% of mix) is expected to bring satisfactory acceleration of setting and improvement of strength regardless of curing temperature.