한국건축시공학회지 (Journal of the Korea Institute of Building Construction)

  • 제19권1호
  • /
  • Pages.59-66
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  • 2019
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  • 1598-2033(pISSN)
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  • 2233-5706(eISSN)
한국건축시공학회 (The Korean Institute of Building Construction)
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내한촉진제를 사용한 고로시멘트 모르타르의 수축성상

Shrinkage Properties of Blast Furnance Slag Cement Mortar by using Frost-Resistant Accelerator

  • Choi, Hyeong-Gil (Graduate School of Architecture, Kyungpook National University) ;
  • Lee, Jun-Cheol (Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University)
  • 투고 : 2018.10.30
  • 심사 : 2018.12.17
  • 발행 : 2019.02.20
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초록

고로시멘트와 내한촉진제를 병용한 모르타르의 수축특성 및 수축성상에 미치는 영향에 대해 검토했다. 그 결과, OPC, BB 모두 내한촉진제를 첨가함에 따라 굳지 않은 성상에 미치는 영향은 작고, 초기재령부터 압축강도는 커진다. 또한, 내한 촉진제를 표준 사용량 이상으로 다량 사용할 경우에는 초기재령에 있어서의 팽창거동, 특히 강도발현과 팽창성의 관계에 대해 검토할 필요가 있다. 한편, 내한촉진제를 첨가함으로써 OPC, BB 모두 길이변화는 증가하는 경향을 확인할 수 있었다. 내한촉진제를 첨가함에 따라 직경 30nm 이하의 세공량, 특히 직경 20~30nm의 세공량 및 ink-bottle 세공량이 감소하여 수축량은 커지게 되며, 이 범위의 세공량의 변화가 수축성상에 미치는 영향이 크다고 판단된다.

In this study, the effects of blast furnance slag cement and frost-resistant accelerator on shrinkage properties and shrinkage properties of mortar were examined. As a result, the addition of the frost-resistant accelerator to both OPC and BB has a small effect on the flash properties of mortar and the compressive strength increases from the early ages. In addition, when a frost-resistant accelerator is used in excess of the standard usage amount, it is necessary to examine the relationship of the expansion behavior at the early age, especially, between the compressive strength development and the expansion property. And it was confirmed that the addition of the frost-resistant accelerator tended to increase the shrinkage of mortar using the OPC and BB. With the addition of the frost-resistant accelerator, the amount of pores with a diameter of under the 30nm, especially, the amount of pores with a diameter of 20 to 30nm and the amount of pores with an ink-bottle decrease, and the shrinkage increases. And it is considered that a change in the amount this range of pores has a large effect on the shrinkage property.

키워드

GCSGBX_2019_v19n1_59_f0001.png 이미지

Figure 1. Overview of expansion rate test[10]

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Figure 2. Fresh properties

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Figure 3. Compressive strength

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Figure 4. Expansion rate

GCSGBX_2019_v19n1_59_f0005.png 이미지

Figure 7. Total porosity ratio

GCSGBX_2019_v19n1_59_f0006.png 이미지

Figure 8. CH content

GCSGBX_2019_v19n1_59_f0007.png 이미지

Figure 9. Differential pore volume of OPC

GCSGBX_2019_v19n1_59_f0008.png 이미지

Figure 10. Differential pore volume of BB

GCSGBX_2019_v19n1_59_f0009.png 이미지

Figure 11. Cumulative pore volume

GCSGBX_2019_v19n1_59_f0010.png 이미지

Figure 12. Cumulative pore volume

GCSGBX_2019_v19n1_59_f0011.png 이미지

Figure 13. Relationship between pore volume and drying shrinkage (under the 30nm and 8nm diameter)

GCSGBX_2019_v19n1_59_f0012.png 이미지

Figure 14. Relationship between pore volume and dryingshrinkage (between 20-30nm diameter and ink bottle pore)

GCSGBX_2019_v19n1_59_f0013.png 이미지

Figure 5. Drying shrinkage

GCSGBX_2019_v19n1_59_f0014.png 이미지

Figure 6. Mass change ratio

Table 1. Experimental programs

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Table 2. Used materials

GCSGBX_2019_v19n1_59_t0002.png 이미지

Table 3. Relationship between pore size and drying shrinkage

GCSGBX_2019_v19n1_59_t0003.png 이미지

참고문헌

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