Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on the Characteristics of Mine Liner According to the Contents of CSA Using Industrial Byproducts

산업부산물을 활용한 CSA 첨가량에 따른 광산 차수재 특성에 관한 연구

  • Received : 2019.02.25
  • Accepted : 2019.03.12
  • Published : 2019.03.30
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Abstract

In this study, to characterize the application of CSA and dihydrate gypsum Utilizing industrial byproducts, we investigated the characteristics of CSA and dihydrate gypsum to investigate the characteristics of Mine Liner according to the addition amount. As a result of compressive strength, length change and absorption rate of mining lime wastewater according to CSA addition amount, up to 30% of CSA showed a positive effect on shrinkage and absorption reduction effect as well as strength at initial age. However, due to excessive use of CSA 50%, it was reduced by 15% compared to OPC due to increase of absorption rate and decrease of cement amount due to over expansion rather than shrinkage compensation and void filling.

본 연구에서는 산업부산물을 활용한 CSA와 이수석고를 광산 차수재에 적용하기 위한 기초자료를 제시하고자 CSA와 이수석고 첨가량에 따른 차수재의 특성을 검토하였으며 그 결과를 다음과 같이 나타내었다. CSA 첨가량에 따른 광산 차수재의 압축강도, 길이변화, 흡수율 측정결과 CSA30%까지는 초기재령에서의 강도증가와 더불어 수축 및 흡수율저감 효과에 긍정적인 영향을 미치는 것으로 나타났다. 그러나 CSA50%에서는 과량 사용으로 인하여 수축보상 및 공극충진보다는 과팽창으로 인한 흡수율 증가와 시멘트양 감소로 인하여 OPC와 비교하여 15% 감소하였다.

Keywords

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Fig. 1. Demec strain gauge

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Fig. 2. Flow according to the CSA contents

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Fig. 3. Compressive strength according to the CSA contents

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Fig. 4. Compressive strength ratio according to the CSA contents

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Fig. 5. Rate of length change

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Fig. 6. Absorption ratio

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Fig. 7. Incremental void distribution volume

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Fig. 8. Cumulative void volume

Table 1. Experiment plan and mix design

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Table 4. Chemical compositions of raw Materials

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Table 2. Physical properties and chemical composition of OPC and slag

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Table 3. Physical properties and chemical composition of drystalline gypsum

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