Results 71 to 80 of about 3,497,749 (200)

Degradation Behavior of Concrete with Multiple Industrial Wastes in a Chloride and Sulfate Environment

Buildings
An experimental investigation was conducted to examine the resistance to sulfate attack and chloride ion diffusion of concrete incorporating multiple industrial wastes (MIWC), including limestone powder (LP), tailings sand, and silica fume (SF).
Bin Lyu, Shuchun Zhou, Yuanzhou Wu, Zhikang Wu   +3 more
doaj   +1 more source

In Situ Determination of the Transport Properties of Near-Surface Concrete Using AC Impedance Spectroscopy Techniques

Journal of Engineering, 2016
The durability of existing concrete structures has increasingly attracted widespread attention in recent years. The phenomenon of performance degradation is often associated with the intrusion of hazardous ions from outside.
Lipeng Wu, Peng Dai, Yong Li
doaj   +1 more source

Influence of the Pretreatment on the Concrete Chloride Diffusion Coefficient

, 2011
The pretreatment of concrete rapid chloride migration coefficient (RCM) method in different standard is different in China. However the influence of pretreatment on the experimental result is uncertain, which leads to poor comparability about the results
Jing Wei Wu, Jia Cheng Li, Yi Bo Yang, Wen Ying Guo   +3 more
core   +1 more source

Probabilistic Analysis of Chloride Ingress Repair Costs Considering External Forces and Vulnerable Sections of RC Girders

International Journal of Concrete Structures and Materials
This study analyzed the chloride ingress repair costs for RC girders by considering cold joints and external force conditions. The diffusion behavior of chloride ions, which varies with the stress conditions, was quantified.
Seung-Jun Kwon, Kwang-Mo Lim, Kyong-Chul Kim, Kyung-Taek Koh, Yong-Sik Yoon   +4 more
doaj   +1 more source

Effect of Diffusion Coefficient on Analysis of Chloride Ion Penetration of ConCrete Structure

, 2002
A new diffusion coefficient model, which considers the effect of chloride binding and evaporable water in concrete, is proposed. The FEM program developed on the basis of the new diffusion coefficient model provides an estimation of chloride ...
한상훈, 김진근, 김동현, 박우선   +3 more
core  

Ageing effect of chloride diffusion coefficient

, 2006
Most of the currently used models to predict chloride ingress a constant diffusion coefficient over time. However, a reduction of the diffusion coefficient over time, is ob-served at specimens that are exposed to chlorides.
Polder, R.B.
core  

Development and evaluation of low-pH concrete plugs suitable for high-level radioactive waste repositories

Case Studies in Construction Materials
In this study, low-pH concrete mixtures suitable for use as plugs in high-level radioactive waste disposal sites were evaluated by designing thirteen mixtures with various ratios of binders, including silica fume, fly ash, and blast furnace slag, and ...
Seokgu Gang, Daewon Lee, Jin-Seop Kim, Youngjin Shin, Jongwon Jung   +4 more
doaj   +1 more source

Assessing the long-term chloride resistance of alkali-activated fly ash/slag concrete by natural chloride diffusion test and rapid chloride migration test

This paper evaluates the long-term chloride resistance of various alkali-activated fly ash/slag (AAFS) concrete, as determined by the natural chloride diffusion (NCD) test and rapid chloride migration (RCM) test, respectively. These concrete mixtures are
Zhang, Zuhua, Zhang, Jingxiao, Yang, Xiaocong, Ma, Yuwei, Yang, Zhihui, Wang, Hao   +5 more
core   +1 more source

The kinetics of the dissolution of chalcopyrite in chloride media [PDF]

, 2009
One of the most important outstanding problems with the hydrometallurgy of copper is the low temperature leaching of chalcopyrite. In this thesis, a fundamental study at low temperature was undertaken in order to establish a mechanism, which is ...
Velásquez Yévenes, Lilian
core  

Effect of Sulfate Ion to Chloride Ion Transmission in Concrete under Flexural Load

, 2011
Chloride ion ingression into concrete under flexural load is investigated in the paper. Concrete specimens have been stored in 3.5%NaCl solution or 3.5%NaCl + 5%Na2SO4 solution for 210 days.
Zu Quan Jin, Qi Chang Zhuang, Jie Lin
core   +1 more source