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Showing 1 to 13 of 13 for “"Chloride Binding"”.
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Spectroscopic Investigation of Cement Hydrate Phases and Their Chloride Binding Properties
The chloride binding capacity depends on the structure and surface properties of the individual hydrates. Portlandite and AFm surfaces have high affinity for chloride due to their positive zeta-potentials. For C-S-H samples, the chloride binding capacity increases with increasing C/S ratio due to …
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Chloride binding and desorption mechanism in blended cement containing supplementary cementitious materials exposed to de-icing brine solutions
… due to its porous nature, particularly from chloride-induced corrosion. This corrosion, primarily caused by chloride ions penetrating concrete, affects over 7.5% of U.S. concrete bridges, incurring annual costs ranging from $5.9 to $9.7 billion. Chlorides enter concrete from various sources, …
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A mechanistic approach For predicting the effect of various factors on partitioning between free and bound chlorides in concrete
The chloride-induced corrosion of reinforcing steel in concrete structures has become a widespread durability problem throughout the world. When concrete structures come in contact with chloride sources, the chloride ions will diffuse through the body of the concrete and ultimately reach the steel. …
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Effect of carbonation on bound chlorides in cementitious and alkali activated binders
… data indicates a mixed performance. <br/><br/>Chloride induced corrosion of reinforced concrete is one of the most common deterioration mechanisms that affect concrete structures exposed to marine or urban environments across the world. The chloride ions that enter concrete can be found either …
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Mechanisms of chloride modulated activity in the C-domain of angiotensin-converting enzyme
… differences in substrate specificities and chloride activation. To investigate these potential mechanisms, a series of single amino acid substitution mutants (based on analysis of aligned C- and N-domain 3D structures) were generated in a soluble, minimally glycosylated C-domain construct. …
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Design, Synthesis and Characterization of Synthetic Ion Receptors as Biologically Functional Ion Carriers and Channels
… In the process, important facets such as ion binding capacity, aggregation behavior, ion transport functionality, and antimicrobial activity are investigated. While these studies yield structural and mechanistic insights into our own research group's synthetic systems, they may also aid in …
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The development of a rapid chloride test for concrete and its use in engineering practice
… as can be ascertained, is the most rapid of all chloride tests developed to date. Due to the short test duration, it is possible to test concretes cured for very short periods. Samples can also be left immersed in chloride solution and re-tested at later ages to study time-dependent phenomena …
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Autoinhibition and Chloride Sensing in the WNK1 Kinase
… autoinhibitory domain retains a conserved RFXV binding site from the PASK/FRAY homology 2 (PF2) domain present in OSR/SPAK. Titration data shows that incubation with a 5-mer and a 20-mer peptide derived from the WNK1 kinase domain displays extensive chemical shift perturbation as assessed by …
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The Mechanism of Chloride Activation of Oxygen Evolution in Spinach Photosystem Ii
… first attempt to directly monitor ${\rm Cl}\sp-$ binding in spinach. At low light intensity, the ${\rm Cl}\sp-$ activation curve (Hill activity vs. (${\rm Cl}\sp-$)) shows three intermediary plateaus in the concentration range 0.1-10 mM ${\rm Cl}\sp-,$ indicating kinetic cooperativity with respect …
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Enhancing the service life of concrete exposed to chloride attack
… to enhance the durability of concrete exposed to chloride attack by means of two approaches: (i) to design sustainable concrete compositions and (ii) to apply suitable maintenance techniques consisting of electrochemical chloride extraction (ECE) and surface coating (SC) treatments. Subsequently, …
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Chloride transport and chloride thresholdvalues-Studies on concretes and mortars with Portland cement and limestone blended cement
… media from the surrounding environment. Chloride initiated reinforcement corrosion is one of the major causes of deterioration of concrete structures. One conflicting issue is how replacing Portland cement with mineral additions influences chloride initiated reinforcement corrosion. This …
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Synthesis and Characterisation of Layered Double Hydroxides (LDHs) Using Red Mud and their Environmental Applications
… in the hydroxide sheet. The ‘role plays’, i.e., chloride binding study and dye adsorption study, were carried out to further understand the anion removal capacity, thermal stability and ‘memory effect’ of the synthesised products. A material screening test was firstly conducted, suggesting …
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Modelización del deterioro de tableros de puentes de hormigón por difusión de cloruros y corrosión de la armadura pasiva
… defined. These models refer mainly to chloride penetration and concrete carbonation, both of them well-known causes of steel depassivation. Present work is focused on chloride attack and distinguishes the two distinct phases traditionally adopted in the literature: initiation stage, …