水化时间对矿物掺合料混凝土抗氯离子渗透性的影响

胡彦君; 张微; 李秀缺

doi:10.13204/j.gyjz200612003

水化时间对矿物掺合料混凝土抗氯离子渗透性的影响

doi: 10.13204/j.gyjz200612003

1.
1 河北科技大学材料科学与工程学院石家庄 050054;
2.
2 河北省产品质量监督检验院石家庄 050002

基金项目:

河北科技大学校立科研基金资助项目(编号:XL2005003)

详细信息

作者简介:
胡彦君,男,1974年9月出生,助教,E-mail:hubluce@163.com

中图分类号: TU528.19
计量
- 文章访问数: 53
- HTML全文浏览量: 6
- PDF下载量: 65
- 被引次数: 0
出版历程
- 收稿日期: 2006-03-10
- 刊出日期: 2006-12-20

THE TIME-DEPENDENT CHLORIDE PERMEABILITY OF BLENDED CONCRETE

Hu Yanjun¹,

1.
1 Material Science and Engineering Institute,Hebei Science and Technology University Shijiazhuang 050054;
2.
2 Hebei Province Institution of Product Quality Supervision and Inspection Shijiazhuang 050002

摘要

摘要: 用电导率法研究了分别掺加粉煤灰、磨细矿渣、硅粉等矿物掺合料混凝土的氯离子渗透性与水化时间的关系,发现在180d养护时间内混凝土的电导与时间经拟合为幂函数关系,且矿物掺合料混凝土电导对养护时间更敏感;混凝土中掺加矿物掺合料可以显著降低混凝土的导电能力;水胶比对混凝土渗透性有较大影响,水胶比越大,混凝土抵抗氯离子渗透的能力越低。
- 掺合料混凝土 /
- 氯离子 /
- 电导 /
- 渗透 /
- 养护时间
Abstract: An electrical conductivity method is employed to estimate the temporal dependence of the chloride permeability of blended concretes(fly ash,ground granulated blast-furnace slag,silica fume).The results show that a power law function is suited to describe the relationship between conductance and time after 180 days' curing,and the function parameters are mathematically fitted.Mineral admixtures can remarkably improve the concrete electrical resistance.The water to binder ratio(W/B) has also great influence on the concrete resistance to chloride penetration,the higher the W/B,the lower permeability of the concrete to chloride.
- blended concrete /
- chloride /
- conductance /
- permeability /
- curing time

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参考文献(10)

ASTM C1202-94 Standard Test Method for Electrical Indication of Concrete Ability to Resist Chloride Ion Penetration

[2] DL/T 5150-2001 水工混凝土试验规程

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[6] Mangat P S,Molloy B T.Prediction of Long Term Chloride Concentration in Concrete.Materials and Structures,1994,27:338-346

[7] Dhir R K,Jones M R.Prediction of Total Chloride Content Profile and Concentration/Time-Dependent Diffusion Coefficients for Concrete.Magazine of Concrete Research,1998,5 (1):37-48

[8] Abo EI-Eneln S A,Kothata M F,Hanna G B,et al.Electrical Conductivity of Concrete Containing Silica Fume.Cement and Concrete Research,1995,25(8):1615-1620

[9] Rolf F Feldman.Investigation of the Rapid Chloride Permeability Test.ACI Materials Journal,1994,92(2):246-255

[10] Dale P,Bentz,Feng X,Hooton R D.Time-Dependent Diffusivities:Possible Misinterpretation due to Spatial Dependence//Second International RILEN Workshop on Testing and Modelling the Chloride Ingress into Concrete,Paris:2000

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