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首页 > 过刊浏览>2024年第46卷第4期 >193-201. DOI:10.11835/j.issn.2096-6717.2022.107
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静停时间对长江下游蒸养疏浚砂浆特性的影响
CSTR:
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作者:
作者单位:

1.河海大学，土木与交通学院，南京 210098;2.河海大学，水利水电学院，南京 210098;3.浙江交工集团股份有限公司，杭州 310051;4.扬州水利局，江苏 扬州 225000

作者简介:

吴朝国（1999- ），男，主要从事绿色高性能混凝土材料研究，E-mail：wcg19991116@163.com。
WU Chaoguo (1999- ), main research interest: high performance green concrete materials, E-mail: wcg19991116@163.com.

通讯作者:

陈徐东（通信作者），男，教授，博士生导师，E-mail：cxdong1985@163.com。

中图分类号:

TU521.1

基金项目:

国家重点研发计划（2021YFB2600200）；国家自然科学基金（51979090）；国家重点实验室开放基金（2019CEM002）


The influence of static stop time on the characteristics of steam dredged mortar in the Yangtze River
Author:
Affiliation:

1.a. College of Civil Engineering and Transportation; 1b. College of Water Resources and Hydropower, Hohai University, Nanjing 210098, P. R. China; 2. Zhejiang Communications Construction Group Co., Ltd., Hangzhou 310051, P. R. China; 3. Yangzhou Water Resources Bureau, Yangzhou 225000, Jiangsu, P. R. China

Fund Project:

National Key R & D Program of China (No. 2021YFB2600200); National Natural Science Foundation of China (No. 51979090); State Key Laboratory of High-Performance Civil Engineering Materials (No. 2019CEM002)

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    摘要:

    长江下游航道疏浚产生大量疏浚砂，疏浚砂的资源化利用受到重视。利用疏浚砂部分取代机制砂制备砂浆，研究不同静停时间对疏浚砂砂浆特性的影响，测试不同龄期的抗压强度，通过X射线衍射、扫描电镜、压汞技术，分析不同静停时间、不同疏浚砂取代率砂浆的微观特性。结果表明：随着静停时间的增加，90 d抗压强度逐渐增加，抗渗性能得到明显改善；掺入疏浚砂使得砂浆的抗压强度有所提高，且随疏浚砂取代率的增加先增大后减小；疏浚砂砂浆的抗压强度与疏浚砂取代率有较大关系，其影响程度与静停时间有关，疏浚砂对低静停时间有较突出的增强效果；疏浚砂有效改善了由蒸养造成的孔结构粗化和孔隙增大等问题，适宜的疏浚砂取代率对蒸养砂浆性能的改善效果明显。

    Abstract:

    Due to the large amount of dredged sand produced by dredging in the lower reaches of the Yangtze River, the resource utilization of dredged sand has been given attention. The mortar was prepared by partially replacing manufactured sand with dredged sand, and the influence of different static stop time on the characteristics of dredged sand mortar was studied, the compressive strength at different ages was tested, through X-ray diffraction, scanning electron microscopy, and mercury pressing technology, the micro characteristics of different static stop time different dredged sand replacement rate mortar. The results show that with the increase of static stop time, the 90 d compressive strength increases gradually, and the impermeability is also significantly improved; The compressive strength of mortar increases with the addition of dredged sand, and increases first and then decreases with the increase of replacement rate of dredged sand; The compressive strength of dredged sand mortar has a great relationship with the replacement rate of dredged sand, and its influence degree is related to the static stop time. The dredged sand has a prominent strengthening effect on the low static stop time; dredged sand can effectively improve the problems of pore structure coarsening and pore enlargement caused by steam curing. Appropriate replacement rate of dredged sand has obvious improvement effect on the performance of steam curing mortar.

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吴朝国,陈徐东,宁英杰,张伟,冯璐.静停时间对长江下游蒸养疏浚砂浆特性的影响[J].土木与环境工程学报（中英文）,2024,46(4):193-201. WU Chaoguo, CHEN Xudong, NING Yingjie, ZHANG Wei, FENG Lu. The influence of static stop time on the characteristics of steam dredged mortar in the Yangtze River[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2024,46(4):193-201.10.11835/j. issn.2096-6717.2022.107

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  • 收稿日期:2022-07-12
  • 在线发布日期: 2024-07-07
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