|Table of Contents|

[1] Li Guo, Gao Xiang,. Effects of secondary water curing on the long-term strengthand durability of concrete after steam-autoclave curing [J]. Journal of Southeast University (English Edition), 2018, (4): 488-494. [doi:10.3969/j.issn.1003-7985.2018.04.011]
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Effects of secondary water curing on the long-term strengthand durability of concrete after steam-autoclave curing()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
Issue:
2018 4
Page:
488-494
Research Field:
Materials Sciences and Engineering
Publishing date:
2018-12-20

Info

Title:
Effects of secondary water curing on the long-term strengthand durability of concrete after steam-autoclave curing
Author(s):
Li Guo Gao Xiang
State Key Laboratory for Geo-Mechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
Keywords:
concrete steam-autoclave curing secondary water curing compressive strength durability
PACS:
TU528.1
DOI:
10.3969/j.issn.1003-7985.2018.04.011
Abstract:
To study the effects of secondary water(SW)curing of 20 ℃ for 7 d on concrete long-term strength and durability after steam-autoclave curing, concrete specimens were fabricated and subjected to standard, steam-autoclave or steam-autoclave + SW curing. The compressive strength, accelerated carbonation depth, and Coulomb electric charges of the specimens were tested at the ages of 28, 90, 180, and 360 d. Furthermore, mercury intrusion porosimetry experiments on the specimens were conducted at the age of 180 d. Results indicate that compared with standard curing, steam-autoclave curing can enhance the early-age strength of concrete; however, it is detrimental to the development of later-age strength, and reduces chloride and carbonation resistance. Due to the replenishment of water into concrete, SW curing can refine the micro-pore size and decrease the ratio of harmful and more harmful pores in concrete. As a result, SW curing is effective in improving the long-term strength and durability of steam-autoclaved concrete, and makes it approach that under standard curing. The improvement amplitudes of SW curing on the concrete compressive strength, chloride and carbonation resistance at 360 d can reach 20.3%, 48.6%, and 80.9%, respectively.

References:

[1] Tan K F, Zhu J Z. Influences of steam and autoclave curing on the strength and chloride permeability of high strength concrete[J]. Materials and Structures, 2017, 50: 56. DOI:10.1617/s11527-016-0913-6.
[2] Yan Z L. Discussion about the two times curing process of steam curing and autoclave curing for PHC pile [J]. Concrete and Cement Product, 2015(3):32-34.(in Chinese)
[3] Zhang J, Mao Y, Qiao M. Studies of non-autoclaved process of PHC pile concrete [J]. Concrete and Cement Product, 2012(7):31-33.(in Chinese)
[4] Yazıcı H, Yigiter H, Aydın S, et al. Autoclaved SIFCON with high volume Class C fly ash binder phase[J]. Cement and Concrete Research, 2006, 36(3): 481-486. DOI:10.1016/j.cemconres.2005.10.002.
[5] Yan Z, Lu Y, Zhong Y, et al. Durability of PHC pile concrete [J]. Concrete and Cement Product, 2008(6):26-29.(in Chinese)
[6] Tan K F, Liu T. Effect of high temperature curing on compressive strength of concrete [J]. Journal of Building and Materials, 2006, 9(4):473-476. DOI:10.3969/j.issn.1007-9629.2006.04.018. (in Chinese)
[7] Mehta P K, Gerwick B. Cracking corrosion interaction in concrete exposed to marine environment [J]. Concrete International, 1982, 4(10):45-51.
[8] Li G, Yao F, Liu P, et al. Long-term carbonation resistance of concrete under initial high-temperature curing[J]. Materials and Structures, 2016, 49(7): 2799-2806. DOI:10.1617/s11527-015-0686-3.
[9] Ramezanianpour A M, Esmaeili K, Ghahari S A, et al. Influence of initial steam curing and different types of mineral additives on mechanical and durability properties of self-compacting concrete[J]. Construction and Building Materials, 2014, 73: 187-194. DOI:10.1016/j.conbuildmat.2014.09.072.
[10] García Calvo J L, Alonso M C, Fernández Luco L, et al. Durability performance of sustainable self compacting concretes in precast products due to heat curing[J]. Construction and Building Materials, 2016, 111: 379-385. DOI:10.1016/j.conbuildmat.2016.02.097.
[11] Detwiler R J, Fapohunda C A, Natale J. Use of supplementary cementing materials to increase the resistance to chloride ion penetration of concrete cured at elevated temperatures [J]. ACI Materials Journal, 1994, 91(1):63–65. DOI:10.14359/4451.
[12] Li G, Dong L, Wang D, et al. Negative effect improvements of accelerated curing on chloride penetration resistance of ordinary concrete [J]. Journal of Southeast University(English Edition), 2017, 33(1):79-85. DOI: 10.3969/j.issn.1003-7985.2017.01.013.
[13] Aldea C M, Young F, Wang K J, et al. Effects of curing conditions on properties of concrete using slag replacement[J]. Cement and Concrete Research, 2000, 30(3): 465-472. DOI:10.1016/S0008-8846(00)00200-3.
[14] Alawad O A, Alhozaimy A, Jaafar M S, et al. Effect of autoclave curing on the microstructure of blended cement mixture incorporating ground dune sand and ground granulated blast furnace slag[J]. International Journal of Concrete Structures and Materials, 2015, 9(3): 381-390. DOI:10.1007/s40069-015-0104-9.
[15] Hooton R D, Titherington M P. Chloride resistance of high-performance concretes subjected to accelerated curing[J]. Cement and Concrete Research, 2004, 34(9): 1561-1567. DOI:10.1016/j.cemconres.2004.03.024.
[16] He Z M, Long G C, Xie Y J. Influence of subsequent curing on water sorptivity and pore structure of steam-cured concrete[J]. Journal of Central South University, 2012, 19(4): 1155-1162. DOI:10.1007/s11771-012-1122-2.
[17] Wang D Z, Zhou X M, Fu B, et al. Chloride ion penetration resistance of concrete containing fly ash and silica fume against combined freezing-thawing and chloride attack[J]. Construction and Building Materials, 2018, 169: 740-747. DOI:10.1016/j.conbuildmat.2018.03.038.
[18] Zhang X H, Wang L, Zhang J R. Mechanical behavior and chloride penetration of high strength concrete under freeze-thaw attack[J]. Cold Regions Science and Technology, 2017, 142: 17-24. DOI:10.1016/j.coldregions.2017.07.004.
[19] Li G, Yang B Y, Guo C S, et al. Time dependence and service life prediction of chloride resistance of concrete coatings[J]. Construction and Building Materials, 2015, 83: 19-25. DOI:10.1016/j.conbuildmat.2015.03.003.
[20] Julio-Betancourt G A, Hooton R D. Study of the Joule effect on rapid chloride permeability values and evaluation of related electrical properties of concretes[J].Cement and Concrete Research, 2004, 34(6): 1007-1015. DOI:10.1016/j.cemconres.2003.11.012.
[21] McGrath P F, Hooton R D. Re-evaluation of the AASHTO T259 90-day saltponding test[J]. Cement and Concrete Research, 1999, 29(8): 1239-1248. DOI:10.1016/S0008-8846(99)00058-7.
[22] Kevern J T, Nowasell Q C. Internal curing of pervious concrete using lightweight aggregates[J]. Construction and Building Materials, 2018, 161: 229-235. DOI:10.1016/j.conbuildmat.2017.11.055.
[23] Zou C, Long G C, Ma C, et al. Effect of subsequent curing on surface permeability and compressive strength of steam-cured concrete[J]. Construction and Building Materials, 2018, 188: 424-432. DOI:10.1016/j.conbuildmat.2018.08.076.
[24] Feng N Q, Xing F. Chloride ion permeability and electrical conductance of high performance concrete [J]. Concrete, 2001(11):3-7. DOI:10.3969/j.issn.1002-3550.2001.11.001. (in Chinese)
[25] Li G, Dong L, Bai Z A, et al. Predicting carbonation depth for concrete with organic film coatings combined with ageing effects[J]. Construction and Building Materials, 2017, 142: 59-65. DOI:10.1016/j.conbuildmat.2017.03.063.
[26] Xu J, Li F M. A meso-scale model for analyzing the chloride diffusion of concrete subjected to external stress[J]. Construction and Building Materials, 2017, 130: 11-21. DOI:10.1016/j.conbuildmat.2016.11.054.
[27] Zhang J Z, Bian F, Zhang Y R, et al. Effect of pore structures on gas permeability and chloride diffusivity of concrete[J]. Construction and Building Materials, 2018, 163: 402-413. DOI:10.1016/j.conbuildmat.2017.12.111.
[28] Wu Z, Lian H. High performance concrete [M]. Beijing: China Railway Publishing House, 1999:43.(in Chinese)
[29] Shui Z, Cao B. Studies about thermal expansion of cement and concrete materials [C]//Proceedings of the 9th National Conference about Cement and Concrete Chemistry and Application Technology. Guangzhou, China, 2005: 429-434.(in Chinese)

Memo

Memo:
Biography: Li Guo(1973—), male, doctor, associate professor, guoli@cumt.edu.cn.
Foundation item: The Fundamental Research Funds for the Central Universities( No.2017XKQY014).
Citation: Li Guo, Gao Xiang.Effects of secondary water curing on the long-term strength and durability of concrete after steam-autoclave curing[J].Journal of Southeast University(English Edition), 2018, 34(4):488-494.DOI:10.3969/j.issn.1003-7985.2018.04.011.
Last Update: 2018-12-20