Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Synthesis of melamine-type functional grinding aids and physical properties of cement applied to them

멜라민계 기능성 분쇄조제의 합성 및 이를 적용한 시멘트의 물리적 특성

  • 최병욱 (계명대학교 토목공학과) ;
  • 장준호 (계명대학교 토목공학과) ;
  • 정용욱 (계명대학교 첨단건설재료실험센터)
  • Received : 2019.03.12
  • Accepted : 2019.06.07
  • Published : 2019.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study intended to manufacture high quality cement, such as solving the quality problem of cement which has been emerging recently, along with improving grinding efficiency. To this end, the synthesis of melamine-functional pulverizing agents and the physical properties of cement applying them were reviewed and the reaction was carried out by dividing the melamine airborne compound into three stages of polymerization using methylation, sulfonation, and acid catalyst to improve the crushing efficiency of cement clinker and the physical properties of manufactured cement. The obtained melamine type copolymer was applied to the grinding process of cement clinker. And it's grinding efficiency and compressive strength were compared with DEG(diethylene glycol) and TIPA(triisopropanol amine). When it comes to the grinding efficiency, by lowering surface energy with stable adsorption from organic polymer to cement particles, the fineness showed 4-6% up. In the meantime, the compression strength hiked 30% from its initial strength compared to the conventional DEG. At the age of 28days, the strength showed approximately 13% improvement. Therefore, it is confirmed that the overall quality has been elevated in comparison with the conventional one.

본 연구는 분쇄효율 향상 및 시멘트의 품질 문제 해결 등 고품질의 시멘트를 제조하기 위하여 멜라민계 기능성 분쇄조제의 합성 및 이를 적용한 시멘트의 물리적 특성을 검토하였다. 시멘트 클링커의 분쇄 효율 및 제조된 시멘트의 물리적 특성을 향상시키기 위하여 멜라민계 공중합체를 methyolation, sulfonation 및 산촉매를 이용하여 polymerzation의 3단계로 나누어 반응을 진행하였다. 합성된 멜라민계 공중합체를 시멘트 클링커 분쇄 공정에 적용하여 기존의 분쇄효율을 향상시키기 위하여 사용되는 DEG(Diethylene glycol)와 압축강도를 향상시키기 위하여 사용되는 TIPA계(Triisopropanol amine) 분쇄조제와의 물리적 특성을 비교하였다. 연구결과 분쇄능의 경우 유기 고분자의 시멘트 입자로의 안정한 흡착으로 표면 에너지를 감소시킴에 따라 기존 DEG와 TIPA계 분쇄조제 대비 분말도는 4~6% 증진시키는 것으로 나타났으며, 압축강도는 기존 DEG 대비 초기 강도에 있어서는 약 30%, 28일 재령의 경우 약 13%이상의 강도 증진 효과가 확인됨에 따라 전체적인 품질은 기존 분쇄조제 대비 향상된 것으로 나타났다.

Keywords

SHGSCZ_2019_v20n6_126_f0001.png 이미지

Fig. 1. Synthesis scheme of Sulfonated methyol melamine copolymer

SHGSCZ_2019_v20n6_126_f0002.png 이미지

Fig. 2. Ball mill for laboratory & Jaw crusher

SHGSCZ_2019_v20n6_126_f0003.png 이미지

Fig. 3. Mini slump test of cement paste

SHGSCZ_2019_v20n6_126_f0004.png 이미지

Fig. 4. Residual rate by the 45 ㎛ sieve of synthesized copolymer

SHGSCZ_2019_v20n6_126_f0005.png 이미지

Fig. 5. Slump flow and loss of cement made from synthetic organic polymer

SHGSCZ_2019_v20n6_126_f0006.png 이미지

Fig. 6. Compressive strengths characteristics of synthesized copolymer by age

Table 1. Chemical composition of materials

SHGSCZ_2019_v20n6_126_t0001.png 이미지

Table 2. Various synthesis conditions of Sulfonated methyol melamine copolymer

SHGSCZ_2019_v20n6_126_t0002.png 이미지

Table 3. Blaine test of synthesized copolymer

SHGSCZ_2019_v20n6_126_t0003.png 이미지

Table 4. Residual rate test by the 45 ㎛ sieve

SHGSCZ_2019_v20n6_126_t0004.png 이미지

Table 5. Slump flow test of cement paste

SHGSCZ_2019_v20n6_126_t0005.png 이미지

Table 6. Compressive strengths test of synthesized copolymer

SHGSCZ_2019_v20n6_126_t0006.png 이미지

References

  1. B. W. Jo, R. G. Moon and J. B. Park, "An Experimental Study on the High Strength Concrete using Nano Cement," Proceedings of the korea society of civil engineers, pp. 534-538, 2004.
  2. K. T. Koh, J. J. Park, J. S. Lee and S. W. Kim, "Shrinkage Properties of High Performance Concrete Incorporating Mineral Admixtures," JOURNAL OF THE KOREAN SOCIETY OF CIVIL ENGINEERS, Vol. 23, No. 6A, pp. 1133-1141, 2003.
  3. S. H. Kim, "Grinding and Separation Techniques in Cement Industry," CERAMIST, Vol. 2, No. 2, pp. 133-144, 1987.
  4. J. R. Lee, B. Y. Jun and W. S. Kim, "Contribution of Japanese Cement Industry towards Addressing Environmental Issues," Magazine of the Korea Concrete Institute, Vol. 19, No. 2, pp. 22-27, 2007. https://doi.org/10.22636/MKCI.2007.19.2.22
  5. S. B. Shin, E. H. Kim, K. Y. Park and C. Y. Cha, "An Experimental Study on the Grinding Aids Application for Manufacture of Construction Dry Motar," Proceedings of the korea concrete institute, pp. 241-242, 2012.
  6. K. M. Kim, D. S. Lim, Y. S. Song and H. K. Hur, "A Experimental Study of Grinding Performance of Clinker according to the Variety of Mills," Proceedings of the korea concrete institute, pp. 585-586, 2015.
  7. S. W. Yoon and B. W. Choi, "Physical Properties of Cement with Various Grinding Aids," Proceedings of the korea concrete institute, pp. 31-32, 2010.
  8. S. H. Lee and W. K. Kim, "Portland Cement Manufacturing Process and Clinker Formation Mechanism," Magazine of the Korea Concrete Institute, Vol. 30, No. 3, pp. 22-26, 2018.
  9. J. W. Bang, M. J. Park, B. J. Lee and Y. Y. Kim, "Effects of Triethanol Amine and Triisopropanol Amine on the Compressive Strength and Discoloration of Mortar," Journal of the Korea Concrete Institute, Vol. 30, No. 3, pp. 241-246, June 2018. DOI: https://doi.org/10.4334/JKCI.2018.30.3.241
  10. S. M. Choi, J. M. Kim, Y. J. Bok, J. S. Sun and J. H. Sung, "Optimization of Pulverizing Condition for CaO-$Al_2O_3$ Composite in Batch Type Ball Mill," Proceedings of the korea concrete institute, pp. 171-172, 2013.
  11. KSL ISO 679. 2016. Methods of Testing Cements Determination of Strength. Korean Standards Association.