포틀랜드시멘트계 경화체의 황산염저항성

Sulfate Resistance of Portland CementMatrices

  • 문한영 (한양대학교 공과대학 토목공학과) ;
  • 이승태 (한양대학교 대학원 토목공학과) ;
  • 김홍삼 (한양대학교 대학원 토목공학과)
  • 발행 : 2000.04.01

초록

To consider sulfate resistance of cement pastes and motars for 3 types of portland cements which have different $C_3A$ contents an silicate ratio($C_3S/C_2S$), they were immersed in 5% sodium sulfate solution for 400 days. SEM analysis and ($Ca(OH)_2$ contents of cement pastes, and compressive strength and length change of cement mortars, were performed to investigate the effects of ($C_3$ and ($Ca(OH)_2$ contents. According to the results of this study, low heat portland cement pastes, and compressive strength and length change of cement mortars, were performed to investigate the effects of C3A and ($Ca(OH)_2$ contents. According to the results of this study, low heat portland cement had a good sulfate resistances because of a small quantity of gypsum and ettringite due to less ($Ca(OH)_2$ contents. However, ordinary portland cement had an adverse result. This was also confirmed by SEM analysis.

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