长江科学院院报 ›› 2016, Vol. 33 ›› Issue (7): 126-131.DOI: 10.11988/ckyyb.20150354

• 水工结构与材料 • 上一篇    下一篇

硫酸铵腐蚀混凝土性能劣化时变规律及预测

邓通发1a,1b, 彭剑1a,1b, 欧阳斌2, 朱沛东1a, 林煌1a   

  1. 1.江西理工大学 a.建筑与测绘工程学院;b.江西省环境岩土与工程灾害控制重点实验室,江西 赣州 341000;
    2.江西五方建筑设计有限公司,江西 赣州 341000
  • 收稿日期:2015-04-26 出版日期:2016-07-01 发布日期:2016-07-11
  • 作者简介:邓通发(1980-),男,江西赣州人,副教授, 硕士,主要从事桥梁与隧道工程研究方面的工作,(电话)13970783208(电子信箱)dbdtf@163.com。
  • 基金资助:
    江西省自然科学基金项目(2015BAB206054);江西省交通厅科技(2014C0007)

Regularity of Compressive Strength Deterioration and Grey Prediction of Concrete Corrosion in Ammonium Sulfate Solution

DENG Tong-fa1,2, PENG Jian1,2, OUYANG Bin3, ZHU Pei-dong1, LIN Huang1   

  1. 1.School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000,China;
    2.Jiangxi Provincial Key Laboratory of Environmental Geotechnical Engineering and Disaster Control, , Jiangxi University of Science and Technology, Ganzhou 341000,China;
    3. Jiangxi Wufang Architectural Design Co.Ltd.,Ganzhou 341000,China
  • Received:2015-04-26 Online:2016-07-01 Published:2016-07-11

摘要: 通过在5%浓度硫酸铵溶液中长期浸泡,对不同水灰比、不同浆骨比、不同粉煤灰掺量的混凝土试件进行腐蚀试验研究,得到0~120 d腐蚀龄期下试件抗压强度的劣化规律。采用灰色关联分析方法研究了不同因素对混凝土抗压强度影响的显著程度,通过构建GM(1,1)预测模型对受硫酸铵腐蚀的混凝土强度劣化规律及服役寿命进行预测。结果表明:水灰比0.4、浆骨比0.28和粉煤灰掺量10%的受腐蚀混凝土抗腐蚀性能较强,随水灰比、浆骨比和粉煤灰掺量比例增大,抗压强度降幅明显。构建的GM(1,1)预测模型具有较高的精度,运用该模型在预测受腐蚀混凝土的寿命中,粉煤灰掺量10%、水灰比0.4及浆骨比0.28的受腐蚀混凝土分别比其它影响因素相同下的受腐蚀混凝土增加247%,125%,74%。

关键词: 硫酸铵, 混凝土, 水灰比, 浆骨比, 粉煤灰掺量, GM(1, 1)预测模型

Abstract: Corrosion tests were carried out by immersing concretes in ammonium sulfate solution of 5% concentration. The concretes are of different material compositions of water cement ratio, paste aggregate ratio and content of fly ash. The regularity of deterioration of compressive strength of immersed concretes during 0-120 d corrosion age were obtained. The grey correlation analysis method was used to research the influence of different factors on the compressive strength of concrete, and the GM (1,1) prediction model was established to forecast the service life and strength deterioration of the concretes in ammonium sulfate solution. Results show that the concretes with water cement ratio of 0.4, paste aggregate ratio of 0.28 and fly ash content of 10% have better anti-erosion performance. Moreover, the compressive strength of concretes declines significantly with the increases in water cement ratio, paste aggregate ratio and fly ash dosage. The prediction results by the GM(1,1) model indicate that the lifetimes of concretes with water cement ratio of 0.4, paste aggregate ratio of 0.28 and fly ash content of 10% increase by 247%, 125% and 74% than those of concretes with the same influence factors, respectively.

Key words: ammonium sulfate, concrete, water cement ratio, paste aggregate ratio, fly ash content, GM (1,1) prediction model

中图分类号: