Improvement of quality of slag concrete by high alite cement

Tóm tắt: 113 | PDF: 47

##plugins.themes.academic_pro.article.main##

Author

  • Huynh Phuong Nam

Từ khóa:

slag concrete
high alite cement
direct tensile strength
bond strength
SWAT (surface water absorption test)
water absorption rate at 10 minutes (p600)
covercrete

Tóm tắt

Concrete containing ground granulated blast furnace slag (GGBFS) has many advantages but it is easily subjected to cracking and has low quality when cured in poor conditions. For sustainability of slag concrete structures, these disadvantages need to be overcome. In this study, the effectiveness of high alite cement (HAC) in improving cracking and quality of covercrete of slag concrete was investigated. Cracking resistance ability was examined by tensile strength of concrete; while surface water absorption test was applied to study the quality of covercrete. The results revealed the capacity of HAC in improving tensile strength of slag concrete. High bond strength between aggregate and HAC mortar contributed significantly to larger tensile strength. HAC slag concrete also exhibited a high resistance against water absorption. The results revealed the capacity of HAC in improving tensile strength of slag concrete. High bond strength between aggregate and HAC mortar contributed significantly to larger tensile strength. HAC slag concrete also exhibited a high resistance against water absorption.

Tài liệu tham khảo

    [1] American Concrete Institute, “Ground Granulated Blast-Furnace Slag as a Cementitious Constituent in Concrete”, ACI Committee 233, 1995.
    [2] Son, H. N. and Hosoda, A., “Detection of microcracking in concrete subjected to elevated temperature at very early age by acoustic emission”, Journal of Advanced Concrete Technology, Vol. 8, No. 2, pp. 201-211, 2010.
    [3] Hashimoto, A., et al., “Properties of high alite cement”, Proceedings of the JCA, Vol. 66, pp. 32-33, 2012. (in Japanese).
    [4] Neville, A. M., "Properties of Concrete," John Wiley & Sons, pp.563-571, 1996.
    [5] Schönlin, K. and Hilsdorf, H., “Evaluation of the effectiveness of curing of concrete structures”, ACI SP-100, Concrete Durability. Katharine and Bryant Mather Intern. Confer., Vol. 1, Detroit, ACI, pp. 207-226, 1987.
    [6] Long, A.E., Henderson, G.D. and Montgomery, F.R., “Why assess the properties of near-surface concrete?”, Construction and Building Materials, Vol. 15, pp. 65-79, 2001.
    [7] Torrent, R., “A two-chamber vacuum cell for measuring the coefficient of permeability to air of the concrete cover on site”, Materialsand Structures, Vol.25, No.150, pp. 358-365, July 1992.
    [8] British Standards Institution, “Test for determining the initial surface absorption of concrete. Methods of testing hardened concrete for other than strength”, BS 1881: Part 5, pp. 27-35, 1970.
    [9] Montgomery, F.R. and Adams, A., “Early experience with a new concrete permeability apparatus”, Proceedings of Structural Faults-85, pp. 359-363, ICE London 1985.
    [10] Basheer, P.A.M., “Clam permeability tests for assessing the durability of concrete”, Ph.D. thesis submitted to The Queen’s University of Belfast, 438 pp., 1991.
    [11] Hayshi, K. and Hosoda, A., “Developement of Water Absorption Test Method Applicable to Actual Concrete Structures”, Proceedings of the JCI, Vol. 33, No.1, pp. 1769-1774, 2011. (in Japanese).
    [12] Usman, K., Hosoda, A., Hayashi, K., and Motoshige, N., “Inspection of cover concrete of an actual structure by Surface Water Absorption Test”, Proceedings of the 9th International Symposium on High Performance Concrete-Design, Verification and Utilization, Rotorua, New Zealand, C9-1 U, 2011.
    [13] Siribudhaiwan, N., et al.,“Influence of alite content on the hydration of blended cement”, The 1st International Conference on Concrete Sustainability (ICCS13), pp. 447-452, 2013.
    [14] Mindess, S., Young, J. F. and Darwin, D., “Concrete”, 2nd ed., Prentice Hall, 2003.
    [15] Iwamoto, Y., Master thesis submitted to Yokohama National University (Concrete Laboratory), 2014. (in Japanese).
    [16] Dirh, R. K., Hewlett, P. C., and Chan, Y. N., “Near-surface characteristics of concrete: assessment and development of in situ test methods”, Magazine of Concrete Research, Vol. 39, No. 141, pp. 183-195, 1987.
    [17] ASTM International, ASTM C140-11a, Standard test method for sampling and testing concrete masonry units and related units, 2011.
    [18] Nam, H. P. and Hosoda, A., “Resistance against microcracking of slag concrete with High Alite Cement analyzed by AE with new wave-guide”, Proceedings of the JCI, Vol. 35, No. 1, pp. 241-246, 2013.
Xem thêm

##plugins.themes.academic_pro.article.sidebar##

Đã Xuất bản

Jun 30, 2015
Download
PDF (English)
Cách trích dẫn
Huynh Phuong Nam. “Improvement of Quality of Slag Concrete by High Alite Cement”. Tạp Chí Khoa học Và Công nghệ Đại học Đà Nẵng, vol 6, số p.h 91, Tháng Sáu 2015, tr 34-37, https://jst-ud.vn/jst-ud/article/view/1601.

##plugins.themes.academic_pro.article.details##