在越南海洋环境中使用不同硅灰含量的高强度混凝土的力学性能和使用寿命分析

IF 0.9 4区 工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY Journal of Engineering Research Pub Date : 2024-06-01 DOI:10.1016/j.jer.2023.08.005
Long Khanh Nguyen , Thi Tuyet Trinh Nguyen , Sang Thanh Nguyen , Trinh Quoc Ngo , Thanh-Hai Le , Viet Quoc Dang , Lanh Si Ho
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引用次数: 0

摘要

本研究评估了掺入不同硅灰(SF)的混凝土的耐久性,并计算了这种混凝土在海洋环境中的使用寿命。试样采用三种不同的硅灰含量(即硅灰取代水泥质量的 8%、10% 和 12%)制备。制备混凝土试样时使用了三种水/粘合剂比率(0.25、0.30 和 0.35)。力学性能通过压缩和劈裂拉伸试验进行评估。采用氯化物快速渗透和氯化物迁移实验来评估混凝土的耐久性。结果表明,掺入 10% SF 的混合物性能最佳。掺入 SF 不仅降低了总孔隙率,还细化了无害孔隙和较无害孔隙的体积分数(< 200 nm)。因此,混凝土的抗氯离子渗透性得到了提高,从而降低了钢筋的潜在腐蚀率。使用 Life-365 软件预测使用寿命的结果表明,使用 SF 替代水泥可有效提高海工钢筋混凝土中钢筋的抗腐蚀能力。用适当浓度的 SF 替代水泥,可显著延长抗盐害的使用寿命。
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Mechanical properties and service life analysis of high strength concrete using different silica fume contents in marine environment in Vietnam

This study evaluated the durability of concrete incorporating different silica fume (SF) content and also computed the service life of this concrete in marine environments. The specimens were prepared with three different SF content (i.e. 8%, 10%, and 12% by mass of cement replaced with SF). Three water/binder ratios (0.25, 0.30, and 0.35) were used for preparing concrete specimens. The mechanical properties were assessed via compression and splitting tensile tests. The rapid chloride penetration and chloride migration experiments were employed to evaluate the durability of concrete. The results showed that the mixture with 10% SF replacement showed the best performance. The inclusion of SF not only reduced the total porosity but also refined the volume fraction of harmless and less harmful pores (< 200 nm). Consequently, the chloride ion penetration resistance of concrete was improved, which in turn reduced the potential corrosion rate of reinforcement. From the results of service life prediction using Life-365 software, it is indicated that the utilization of SF for cement replacement effectively improved the corrosion resistance of steel bars in marine reinforced concrete. The service life against salt damage can be remarkably extended by substituting cement with an appropriate SF level.

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来源期刊
Journal of Engineering Research
Journal of Engineering Research ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
10.00%
发文量
181
审稿时长
20 weeks
期刊介绍: Journal of Engineering Research (JER) is a international, peer reviewed journal which publishes full length original research papers, reviews, case studies related to all areas of Engineering such as: Civil, Mechanical, Industrial, Electrical, Computer, Chemical, Petroleum, Aerospace, Architectural, Biomedical, Coastal, Environmental, Marine & Ocean, Metallurgical & Materials, software, Surveying, Systems and Manufacturing Engineering. In particular, JER focuses on innovative approaches and methods that contribute to solving the environmental and manufacturing problems, which exist primarily in the Arabian Gulf region and the Middle East countries. Kuwait University used to publish the Journal "Kuwait Journal of Science and Engineering" (ISSN: 1024-8684), which included Science and Engineering articles since 1974. In 2011 the decision was taken to split KJSE into two independent Journals - "Journal of Engineering Research "(JER) and "Kuwait Journal of Science" (KJS).
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