Results 61 to 70 of about 3,497,749 (200)

Durability of Subsea Tunnels under the Coupled Action of Stress and Chloride Ions

open access: yesApplied Sciences, 2019
The durability of subsea tunnels under the coupled action of stress and chloride ions was analyzed to estimate the service life and provide a theoretical foundation for durability design.
Qingli Zhao, Limin Lu
doaj   +1 more source

Durability experimental study and service life evaluation of basalt-PVA fibre-reinforced concrete in chloride-rich environments

open access: yesCase Studies in Construction Materials
To investigate the impact of chloride salt corrosion on the durability of both basalt fibre-reinforced concrete and basalt-PVA hybrid-fibre concrete, this study takes the impermeability of fibre-reinforced concrete as a baseline to examine the diffusion ...
Rui Guo   +3 more
doaj   +1 more source

The Use of Electrodiffusion for Removing Chlorides from Concrete

open access: yesInternational Journal of Applied Mechanics and Engineering, 2016
The article presents a description of ion migration in a concrete pore liquid caused by an external electric field. The equation of the flow of aggressive chloride ions is formulated on the basis of partial equations of mass balance.
A. Alsabry
doaj   +1 more source

Factors affecting diffusion coefficient of the hydroxide ion in aqueous tetraalklylammonium nitrate solutions

open access: yes, 1994
The effect of OH concentration on its diffusion coefficient in aqueous Me4NN03 and BU4NN03 solutions at total ionic strength of 0.50 mol dm-3 was studied. The diffusion coefficient was found to increase from a Iow value and reached a steady-state.
McDougall, A.O., Al-Mayouf, A.M.
core  

AN ION SELECTIVE MICROGRIPPER SENSOR DEVICE [PDF]

open access: yes, 2013
This thesis presents the design, fabrication, characterisation and testing of a chemically modified electrothermally actuated microgripper. The chemical modification involves the integration of a potentiometric ion selective electrode (ISE) onto a bare ...
DAUNTON, RACHAEL,HANNAH
core  

Influence of carbonation on the chloride ion diffusion coefficient in fly ash concrete

open access: yes, 2016
The incorporation of fly ash (FA) in cementitious matrices has been frequently used in order to make the matrix more resistant to the action of chlorides. On the other hand, it is known that Ca(OH)2 existing in the matrix is consumed by the pozzolanic reactions, which makes easier the carbonation front advance.
Malheiro, Raphaele   +6 more
  +7 more sources

Investigation of natural diffusion behavior in concrete using iodide replacing chloride ions: The impact of mineral admixtures types and dosages

open access: yesJournal of Materials Research and Technology
The chloride natural diffusion (CND) test is often used in concrete-related field to analyze the chloride diffusion behavior in concrete and chloride diffusion coefficient (D(Chloride)) is an important parameter for durability assessment of RC structures.
Hesong Jin   +3 more
doaj   +1 more source

Effect of Curing Condition on the Chloride ion Diffusion Coefficient in Concrete with GGBFS

open access: yes, 2019
양생조건이 GGBFS를 사용한 시멘트 콘크리트의 염화물이온 확산계수에 미치는 영향에 대한 연구를 진행하였다. 양생조건은 기중양생 (20±2℃, RH 60±5%)과 수중 양생 (20±2℃)으로 구분하였으며, GGBFS 치환율은 0%(대조군), 30%, 60%로 구분하여 3가지 배합의 콘크리트를 W/B 40%, 50%, 60%로 구분하여 제작하였다.
이한승
core  

Comparison of Diffusion and Chloride Ion Penetration of High-Performance Concrete

open access: yes, 2010
This paper reports the results of an investigation of chloride ion penetration and diffusion for high performance concrete. Concrete was prepared incorporating pulverised fuel ash (PFA) and silica fume (SF) with various water-binder ratios.
Mohammad Iqbal Khan
core   +1 more source

Reliability-based service life prediction of concrete subjected to chloride attack: the impact of temperature and relative humidity

open access: yesScience and Engineering of Composite Materials
In marine environments, the concrete deterioration due to chloride ion attack is influenced by a number of factors. A chloride diffusion model considering multiple factors was proposed and validated through experiments.
Liu Yuefang   +5 more
doaj   +1 more source

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