Chloride Penetration and Binding in Recycled Concrete

Jos Brouwers - Research

In October 2010 the STW (Dutch Technology Foundation) project "Chloride penetration in cracked and uncracked concrete structures" has started , a joint project with T.U. Delft. In total three PhDs (Ir. A. Taher and Z. Qu B.Sc. , T.U. Delft: Dr. Dipl.-Eng. A. Blagojevic) are work ing on humidity and chloride transport in cracked and uncracked

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EBD : Test methods to evaluate durability of blended

Pre-standard methods for testing the effect of binder on the durability against deleterious ions (chloride penetration and sulfate attack tests focusing at cement paste scale) Reports of phase 1 and 2 testing phases, in the form of journal papers; Recommendations for evaluating new binding materials in terms of durability

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Chloride in cement | Advances in Cement Research

Chloride binding can retard the migration of chloride in concrete and specimen calculations are presented showing that the main binding mechanism arises from the AFm, [Ca 2 (Al,Fe)(OH) 6].X.nH 2 O, content of the paste. Suggestions are made to enhance the value of experimental approaches to corrosion.

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Numerical Model for Chloride Penetration into Saturated

In this paper, the multispecies model was used to describe the chloride transport in saturated concrete. The model was solved by using the finite-difference method by inputting parameters such as porosity, density, chemical composition of pore solution, diffusion coefficient, and chloride-binding isotherm.

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PDF ReviewArticle - Hindawi

ReviewArticle Chloride-Induced Corrosion of Steel in Concrete: An Overview on Chloride Diffusion and Prediction of Corrosion Initiation Time MuhammadUmarKhan,ShamsadAhmad,andHusainJubranAl-Gahtani

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Chloride ion penetration resistance of concrete containing

50 Chloride penetration in concrete can be characterized by the chloride diffusion 51 coefficient and the binding ability of matrix-forming solids [15]. In concrete, 52 chlorides can be Crushed limestone aggregates were used as coarse

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Chloride diffusion and binding in concrete containing NO2

This study investigates the effect of NO 2 sequestered recycled concrete aggregates (NRCA) on chloride ion diffusion and chloride binding capacity of concrete. Two types of NRCAs were used as a partial replacement for natural fine aggregate in fresh OPC mixtures at 20% and 40% replacement levels by volume.

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New directions for reinforced concrete coastal structures

The chloride ingress process is further complicated by chloride binding, ionic interaction, aging factors, temperature, humidity, and submerged pressure effects [33,34,35]. Subsequent durability modelling is complicated by the presence of cracks in the concrete, the relative sustained or fatigue stress in the internal reinforcing, and

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E ect of Mix Constituents and Curing Conditions on

2) [3]. This process, known as chemical chloride binding, is exhibited in cement pastes containing supplementary cementitious materials (SCMs) with high content of C3A. Physical chloride binding occurs when ions are absorbed directly by C-S-H gel. The high amount of C3A is a characteristic of GGBS while Ca(OH)2 is a cement hydration product.

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Effect of Non-Linear Chloride Binding on ...

Fick's second law is usually used to predict the penetration of chloride ions into concrete. The diffusion coefficient depends on the chloride binding properties. Since the chloride binding capacity varies with chloride concentration, the diffusion coefficient is not a constant.

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Recycled Aggregate Concrete Structures | Jianzhuang Xiao

Dr. Xiao's main areas of research are in the material behavior and structural performance of recycled aggregate concrete, aspects he has been exploring for the past 15 years. He is the author or co-author of more than 300 papers on material properties and material behavior, interfacial layer mechanisms, and modeled recycled aggregate concrete.

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