Hydration Characteristics of Natural Hydraulic Lime Depending on Silica Fume and Anhydrite Replacement

Ki-Yeon  Moon; Moon-Kwan  Choi; Kye-Hong  Cho; Jin-Sang  Cho; Chang-Woo  Hong; Woo-Teck  Kwon; Ji-Whan  Ahn

doi:10.12972/ksmer.2016.53.6.583

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Research Paper

Hydration Characteristics of Natural Hydraulic Lime Depending on Silica Fume and Anhydrite Replacement 실리카흄 및 석고 혼입에 따른 천연수경성석회의 수화특성

31 December 2016. pp. 583-591

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Abstract

In the present study, the effects of adding a inorganic admixture such as silica fume (SF) and anhydrite to natural hydraulic lime (NHL) on hydration properties were systematically investigated. NHL was produced using domestic low-grade limestone. The hydration properties of NHL pastes were then investigated as a function of the hydration time and mixing ratio of mineral admixture. Through an investigation of the hydration properties of NHL pastes mixed with SF and anhydrite, C-S-H compounds and CaCO³ were observed. According to adding anhydrite, the formation of C-S-H hydrates was slightly delayed, but CaCO³ was created more than other specimen. The compressive strength was increased by the mixing of the silica fume, and optimum mixing ratio was about 20%. The compressive strength was increased more higher than other mortars from curing 7 days by addition of anhydrite, it was increased to maximum 10.2 MPa at 28 days.

Keywords

Natural hydraulic lime

Low-grade limestone

Silica fume

Anhydrite

Waste recycling

본 연구에서는 무기질 첨가재인 실리카 흄과 석고 첨가에 따른 천연수경성석회 (NHL)의 수화특성에 대해 연구를 수행하였다. 연구에서 사용된 천연수경성석회는 국내 저품위 석회석을 활용하여 제조하였다. 천연수경성석회 페이스트의 수화특성은 무기질 첨가재의 혼합비 및 수화시간에 따라 조사되었다. 또한, EU 규격에 의한 방법으로 모르타르를 제작하여 압축강도 측정을 실시하였다. 실리카 흄과 석고를 혼합하여 제조한 천연수경성석회 페이스트의 수화특성분석결과 실리카 흄과 Ca(OH)²와의 반응에 의해 생성된 칼슘실리케이트 수화물 및 Ca(OH)²의 탄산화반응에 의한 CaCO³가 관찰되었다. 석고 혼합에 따라 칼슘실리케이트 수화물 생성은 다소 지연되었으나 CaCO³가 더 많이 생성되었다. 압축강도 분석결과 실리카 흄 첨가에 따라 압축강도는 증가하였으며 적정 혼입율은 20% 정도였다. 석고 첨가에 따라 재령 7일부터 압축강도가 증가하여 재령 28일에서 최대 10.2 MPa까지 상승하였다.

키워드

천연수경성석회

저품위 석회석

실리카흄

무수석고

폐기물 재활용

References

References

Baltakys, K., Jauberthie, R., Siauciunas, R. and Kaminskas, R., 2007, “Influence of modification of SiO₂ on the formation of calcium silicate hydrate,” Materials Science-Poland, Vol. 25, No. 3, pp. 663-670.

BS EN 459-1:2015, “Building lime, Part 1: definitions, specifi-cations and confirmity criteria,” British-Adopted European Standard, UK.

Callebaut, K., Elsen, J., Van Balen, K. and Viaene, W., 2001, “Nineteenth century hydraulic restoration mortars in the Saint Michae’s Church(Leuven, Belgium): Natural hydraulic lime or cement?,” Cement and Concrete Research, Vol. 31, No. 3, pp. 397-403.10.1016/S0008-8846(00)00499-3

Cizer, O., 2009, “Competition between carbonation and hydration on the hardening of calcium hydroxide and calcium silicate binders,” PhD dissertation, University of Leuven, BEL.

El-Alfi, E.A., Radwan, A.M. and Abu-El-Naga, H., 2011, “Influence of substitution of ordinary portland cement by silica fume on the hydration of slag-portland cement pastes,” Ceramics–Silikáty, Vol. 55, No. 2, pp. 147-152.

Elfordy, S., Lucas, F., Tancret, F., Scudeller, Y. and Goudet, L., 2008, “Mechanical and thermal properties of lime and hemp concrete (‘‘hempcrete’’) manufactured by a projection process,” Construction and Building Materials, Vol. 22, No. 10, pp. 2116-2123.10.1016/j.conbuildmat.2007.07.016

Grangeon, S., Claret, F., Linardb, Y. and Chiabergea, C., 2013, “X-ray diffraction: a powerful tool to probe and understand the structure of nanocrystalline calcium silicate hydrates,” Acta Crystallographica Section B, B69, pp. 465-473.10.1107/S2052519213021155

Hesse, C., Goetz-Neunhoeffer, F., Neubauer, J., Braeu, M. and Gaeberlein, P., 2009, “Quantitative in-situ X-ray diffraction analysis of early hydration of portland cement at defined temperatures,” International Centre for Diffraction Data, pp. 15-20.

Hu. J. and Wang, K., 2005, “Effects of Aggregate on Flow Properties of Mortar,” Proceedings of the 2005 Mid-Continent Transportation Research Symposium, pp. 1-8.

Kadri, E. -H., Aggoun, S. and De Schutter, G., 2009, “Interaction between C₃A, silica fume and naphthalene sulphonate superplasticiser in high performance concrete,” Construction and Building Materials, Vol. 23, No. 10, pp. 3124-3128.10.1016/j.conbuildmat.2009.06.026

Lanas, J., Perez Beranl, J.L., Bello, M.A. and Alvarez Galindo, J.I., 2004, “Mechanical properties of natural hydraulic lime-based mortars,” Cement and Concrete Research, Vol. 34, No. 12, pp. 2191-2201.10.1016/j.cemconres.2004.02.005

Lawrence, R.M.H., 2006, “A Study of Carbonation in Non-hyd-raulic Lime Mortars,” PhD dissertation, University of Bath, UK.

Maravelaki-Kalaitzakia, P., Bakolasb, A., Karatasiosc, I. and Kilikoglou, V., 2005, “Hydraulic lime mortars for the resto-ration of historic masonry in Crete,” Cement and Concrete Research, Vol. 35, No. 8, pp. 1577-1586.10.1016/j.cemconres.2004.09.001

Naktode, P.L. and Chaudhari, S.R., 2012, “Supplementary Cementitious Materials for Rural Area,” International Conference on Emerging Frontiers in Technology for Rural Area (EFITRA), pp. 37-41.

Sounthararajan, V.M., Srinivasan, K. and Sivakumar, A., 2013, “Micro Filler Effects of Silica-Fume on the Setting and Hardened Properties of Concrete,” Engineering and Technology, Vol. 6, No. 14, pp. 2649-2654.

Winnefeld, F. and Bottger, K.G., 2006, “How clayey fines in aggregates influence the properties of lime mortars,” Materials and Structures, Vol. 39, No. 4, pp. 433-443.10.1617/s11527-005-9023-6

Zhou, Z., 2012, “Development of Bond Strength in Hydraulic Lime Mortared Brickwork,” PhD dissertation, University of Bath, UK.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 53
No :6
Pages :583-591
Received Date : 2016-09-20
Revised Date : 2016-12-12
Accepted Date : 2016-12-22
DOI :https://doi.org/10.12972/ksmer.2016.53.6.583

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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