Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Evaluation on the Performance of Silica Fume Blended Cement Matrix Exposed to External Sulfate Attack

황산염침식을 받은 실리카 퓸 혼합 시멘트 경화체의 성능 평가

  • 이승태 (군산대학교 토목환경공학부)
  • Received : 2006.11.01
  • Published : 2007.07.30
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Abstract

The present study evaluates the resistance to sulfate attack of cement matrix with or without silica fume. The main variable was the replacement levels of silica fume. In order to introduce sulfate attack to cement matrix, mortars and pastes was exposed to sodium sulfate solution for 510 days. Visual examination, expansion and compressive strength loss of mortars in addition to characteristics of pore for the paste samples were regularly investigated. From the test results, it was clearly observed that the cement matrix with silica fume was very resistant to sulfate attack irrespective of the replacement levels of silica fume. However, the severe deterioration due to sulfate attack was found in cement matrix without silica fume.

본 연구는 실리카 퓸을 사용한 시멘트 경화체의 황산염침식 저항성을 평가하기 위하여 수행되었다. 실리카 퓸을 시멘트 중량에 대하여 0, 5, 10 및 15%의 4단계로 대체한 모르타르 및 0 및 10%의 2단계로 대체한 페이스트를 제조하여 침지실험을 실시하였다. 황산나트륨용액에 510일 동안 모르타르 및 페이스트를 침지한 후 재령별 외관조사, 팽창, 압축강도 감소율 및 공극특성을 조사한 결과, 실리카 퓸 대체율에 관계없이 실리카 퓸을 대체한 시멘트 경화체는 황산염침식에 대하여 저항성이 매우 우수하였으나, 보통포틀랜드시멘트 모르타르 및 페이스트는 황산염침식에 의한 극심한 성능저하 현상이 관찰되었다.

Keywords

References

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