• Title/Summary/Keyword: carbon amino silica black superplasticizer

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Mock up test and Field Application of Black Concrete Applying Superplasticizer containing Carbon Amino Silica Black (카본아미노실리카 블랙 고성능감수제(CASB-SP)를 사용한 블랙콘크리트의 Mock-up Test 및 현장적용)

  • Hong, Seok-Min;Han, Min-Cheol
    • Journal of the Korea Institute of Building Construction
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    • v.13 no.6
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    • pp.627-633
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    • 2013
  • This paper presents the result of a mock-up test and field application of concrete that is black in color thanks to the application of superplasticizer containing carbon amino silica black (CASB-SP). Mock-up specimen with a size of $3000{\times}1500{\times}40$ mm was fabricated with black concrete applying 0.5% of CSAB-SP with 27 MPa. After dividing the zone in wall mock-up specimen, three different water repelling agents were applied to verify its effect of efflorescence prevention. It was found that the use of CASB-SP with 0.5% made the black concrete develop a highly clear black color, and the epoxy type water repelling agent had better performance in efflorescence prevention. Based on mock-up test, field application was conducted with bridge member. It was also found that the application of CASB-SP showed favorable results in black color development.

Effect of Carbon Amino Silica Black Contained Superplasticizer on the Engineering Properties and Chromaticity of Black Color Concrete (카본 아미노 실리카 블랙 기반 고성능 감수제가 블랙 컬러 콘크리트의 공학적 특성 및 발색도에 미치는 영향)

  • Han, Min-Cheol;Hong, Seok-Min
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.1 no.3
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    • pp.181-188
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    • 2013
  • This paper is to investigate experimentally an effect of carbon amino silica black-superplasticizer(CASB-SP)on the engineering properties and chromaticity of black color concrete with 0.45 of W/C(water to cement). CASB-SP and carbon black were applied for pigment of the concrete. To prevent efflorescence of concrete, four different water repellent agents were also applied. As results, it was found that use of CASB-SP increased the slump and air contents. Furthermore, the use of CASB-SP increased the compressive strength. As CASB-SP dosages increased, chromaticity was well developed. For the effect of water repellent agent, the use of epoxy type was effective for protection from efflorescence. Based on test results, it was evaluated that 0.5% of CASB-SP effectively improve the concrete quality as well as enhance the chromaticity with proper dosage.

Engineering Properties of Ultra High Strength Concrete Incorporating Silica Fume Using Superplasticizer Containing CASB (CASB 함유 고성능감수제 사용 초고강도 콘크리트의 실리카흄 치환율 변화에 따른 공학적 특성)

  • Kim, Young-Hee;Son, Ho-Jeong;Yoo, Seung-Yeup;Koo, Ja-Sul;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2011.05a
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    • pp.55-56
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    • 2011
  • This paper is to compare and analyze the properties of ultra high strength concrete depending on the use of SF aiming for applicability of superplasticizer containing CASB as a functional agent for strength improvement. As experimental results, in case superplasticizer containing CASB is used, regardless of W/B, settiing time was more accelerated than N, and both compressive strength and tensile strength showed an increase in their strength minutely.

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Characteristics of Color Development of the Black Concrete depending on CASB added Superplasticizer Dosages (CASB-SP 혼입율 변화에 따른 블랙콘크리트의 발색 특성)

  • Kim, Kyoung-Hoon;Hong, Seak-Min;Yoo, Seung-Yeup;Oh, Chi-hyun;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2012.05a
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    • pp.73-75
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    • 2012
  • In this study, basic physical properties and color development of the black concrete depending on CASB-SP dosages are investigated. According to results, It showed that the slump and air contents of the concrete containing CASB-SP meet all requirements of concrete except when CASB-SP 5.0 % is used. It also showed that the more the CASB-SP is used, the higher the compressive strength becomes. On the other hand, It is found that if the CASB-SP 5.0 % is used, the compressive strength was reduced as the more CASB-SP 5 % is used. In terms of color, it was found out that the more CASB-SP is used, the darker the black becomes.

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Analysis of the Effect of Superplasticizer combined CASB on Ultra High Strength Mortar and Concrete Using Mineral Admixture (광물질 혼화재 사용 초고강도 모르타르 및 콘크리트에 CASB 화합 고성능감수제의 효과분석)

  • Han, Cheon-Goo;Yoo, Seung-Yeup
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.6 no.1
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    • pp.72-79
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    • 2011
  • This study is performed to analyze the effects of CASB by applying the superplasticizer combined CASB on the ultra high strength mortar and concrete that uses different mineral admixture depending on whether the silica fume was used and the results are summarized below. From the characteristics of Fresh mortar and concrete, the fluidity was lower in B2-CASB than B2-PC from the mixing of CASB and based on the viscosity of the mortar and concrete in the binary proportion but in the ternary proportion, B3-CASB showed a larger fluidity than B3-PC because of a reduction in the restriction level due to the effects of an improvement of particle size distribution. The compression strength was higher in ternary proportion than in binary proportion and higher in CASB than in PC from the characteristics of hardening mortar and concrete and this is analyzed as a result of increased minuteness from the calcium silicate hydrates produced from the pozzolan reaction of a mineral admixture, SF, and also the charging effects of capillary pore of CASB. Overall, when using the nanomaterial, CASB in combination with a superplasticizer, the fluidity and the strength aspects of the ternary proportion of ultra high strength mortar and concrete with silica fume may be improved to a higher quality.

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