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[1] Han Fanghui, Liu Juanhong, He Xuejiang, Song Shaomin, et al. Experimental studies on the utilization of steel slagin the steam-cured concrete [J]. Journal of Southeast University (English Edition), 2017, 33 (3): 277-285. [doi:10.3969/j.issn.1003-7985.2017.03.005]
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Experimental studies on the utilization of steel slagin the steam-cured concrete()
钢渣在蒸养混凝土中应用的实验研究
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
33
Issue:
2017 3
Page:
277-285
Research Field:
Publishing date:
2017-09-30

Info

Title:
Experimental studies on the utilization of steel slagin the steam-cured concrete
钢渣在蒸养混凝土中应用的实验研究
Author(s):
Han Fanghui1;  Liu Juanhong1;  He Xuejiang1;  Song Shaomin2
1School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China
韩方晖1;  刘娟红1;  何薛江1;  宋少民2
1北京科技大学土木与资源工程学院, 北京 100083; 2北京建筑大学土木与交通工程学院, 北京 102616
Keywords:
steam curing;  steel slag;  compressive strength;  hydration;  durability
蒸养;  钢渣;  抗压强度;  水化;  耐久性
PACS:
-
DOI:
10.3969/j.issn.1003-7985.2017.03.005
Abstract:
The possibility of applying steel slag as mineral admixture in steam-cured concrete was investigated. The compressive strength, chloride permeability, carbonation depth and drying shrinkage of concrete and the microstructure characteristics of hardened paste were studied. Results show that the steam-cured concrete containing steel slag at a high water-to-binder ratio has low compressive strength, coarse pore structure, moderate permeability, large carbonation depth and great drying shrinkage. The negative effects of steel slag on the mechanical and durability performance of steam-cured concrete become smaller at a low water-to-binder ratio or by adding ultrafine ground granulated blast furnace slag(UGGBS). The later-age hydration of cement is significantly promoted by adding steel slag. The pozzolanic reaction and micro-filler effect of UGGBS result in dense structure, which makes great contribution to the strength development and durability performance of steam-cured concrete. These effects of steel slag and UGGBS are significant at a low water to binder ratio. The steam-cured concrete containing steel slag-UGGBS blended mineral admixture at a low water-to-binder ratio has the best performance with high compressive strength, fine pore structure and good durability.
旨在研究钢渣作为矿物掺合料在蒸养混凝土中应用的可能性.研究了混凝土抗压强度、氯离子渗透性、碳化深度和干燥收缩及硬化浆体微结构特性.结果表明:在高水胶比条件下, 含钢渣蒸养混凝土的抗压强度低, 孔结构粗化, 渗透性等级为“中”, 碳化深度和干燥收缩大.降低水胶比或掺入超细矿渣可降低钢渣对蒸养混凝土力学性能和耐久性的负面影响.掺加钢渣显著地促进了水泥的后期水化.超细矿渣的火山灰反应和微集料填充效应使混凝土的结构致密, 对混凝土的强度发展和耐久性有一定贡献.在低水胶比条件下, 钢渣和超细矿渣的作用更加明显.低水胶比下含钢渣和超细矿渣复合矿物掺合料蒸养混凝土的性能最佳, 获得的抗压强度高, 孔结构细化, 耐久性优异.

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Memo

Memo:
Biography: Han Fanghui(1988—), female, doctor, lecturer, hanyang-1120@163.com.
Foundation items: Postdoctoral Science Foundation of China(No.2015M580992, 2016T90036), the Open Fund of State Key Laboratory of High Performance Civil Engineering Materials(No.2015CEM010).
Citation: Han Fanghui, Liu Juanhong, He Xuejiang, et al. Experimental studies on the utilization of steel slag in the steam-cured concrete[J].Journal of Southeast University(English Edition), 2017, 33(3):277-285.DOI:10.3969/j.issn.1003-7985.2017.03.005.
Last Update: 2017-09-20