콘크리트의 강도 및 내구성에 대한 고로슬래그미분말 분말도의 영향 = Effect of Fineness Levels of GGBFS on the Strength and Durability of Concrete

국문 초록 (Abstract)

본 연구는 콘크리트의 강도특성 및 내구성에 대한 고로슬래그미분말 분말도의 영향을 평가하기 위하여 수행되었다. 본 실험에 사용된 고로슬래그미분말의 분말도는 3종류(4,450, 6,000 및 $8,000cm^2/g$)를 선정하였으며, 보통포틀랜드시멘트에 대하여 50%를 대체하여 공시체를 제조하였다. 강도실험 결과에 따르면, 분말도가 $8,000cm^2/g$인 고로슬래그미분말을 사용한 콘크리트의 압축 및 쪼갬인장강도는 초기재령에서는 보통 포틀랜드시멘트 콘크리트에 비하여 다소 작았으나, 장기재령에서는 잠재수경성의 촉진으로 인하여 강도가 우수하게 나타났다. 내구성 분석결과에 의하면, 고분말도(6,000 및 $8,000cm^2/g$) 고로슬래그미분말 사용 콘크리트의 동결융해 저항성이 다소 작게 나타난 반면, 염소이온 침투저항성은 분말도 크기에 관계없이 고로슬래그미분말 적용 콘크리트가 우수하게 관찰되었다. 한편, 고로슬래그미분말을 사용한 모르타르의 황산염침식 저항성은 침식환경에 지배적인 영향을 받는 것으로 조사되었다.

다국어 초록 (Multilingual Abstract)

This paper presents the results of experimental work on both strength characteristics and durability of concrete or mortar having 50% ground granulate blastfurnace slag(GBS) with different fineness levels (4,450, 6,000 and $8,000cm^2/g$). Compressive and split tensile strength test results indicated that the concrete with a higher fineness level of GBS exhibited a better strength development due to the acceleration of latent hydraulic property at the later curing stage compared with ordinary portland cement concrete. Meanwhile, it was found that a higher fineness level of GBS showed some negative effects on the resistance against freezing-thawing action. However, incorporation of GBS to concrete, irrespective of fineness levels, significantly enhanced the chloride ions penetration resistance. The resistance against sulfate attack of mortar with GBS was greatly dependent on the attacking sources from sulfate environments.

참고문헌 (Reference)

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