Results 31 to 40 of about 42,334 (260)

Thermodynamic Modeling of the Effects of Wollastonite-Silica Fume Combination in the Cement Hydration and Sulfate Attack [PDF]

Civil Engineering Infrastructures Journal, 2018
Sulfate attack is a series of physico-chemical reactions between hardened cement paste and sulfate ions. Sulfate ion penetration into the hydrated cement results in the formation of voluminous and deleterious phases such as gypsum and ettringite which ...
Amir Tarighat, Yaghout Modarres, Milad Mohammadi   +2 more
doaj   +1 more source

Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies

Advanced Engineering Materials, EarlyView.
Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo, Daniela Winsley Valereto Friozi, Vinícius de Oliveira, Marcia Cristina Branciforti   +3 more
wiley   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Application of sulfate ion fixation in internal sulfate attack: The gel containing barium salt

Case Studies in Construction Materials
Sulfate attack is one of the most important factors affecting the durability of concrete, and the corrosion sources of internal sulfate attack (ISA) mostly come from the raw materials of concrete. Adding corrosion resistance admixtures to concrete is one
Kaiwei Liu, Yawen Sun, Shansan Shen, Daosheng Sun, Aiguo Wang, Yueming Wang   +5 more
doaj   +1 more source

Thaumasite form of sulfate attack in ettringite rich-ternary systems: Effects of limestone filler, etching solutions and exposure temperature

Developments in the Built Environment, 2023
This study aims to investigate the effect of limestone filler, sulfate concentration and temperature on the thaumasite sulfate attack (TSA) in Portland cement (PC)-calcium aluminate cement (CAC)-gypsum ternary system.
Zhenghong Yang, Weikang Zhang, Huimei Zhu, Yuting Chen, Linglin Xu, Peng Wang, Yong Lai   +6 more
doaj   +1 more source

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

The effects of nano- and micro-particle additives on the durability and mechanical properties of mortars exposed to internal and external sulfate attacks

Results in Physics, 2017
In this study, the effects of micro-silica (MS), nano-silica (NS), class C fly ash (FA), and metakaolin (MK) on the durability and mechanical properties of mortars exposed to internal and external sulfate attacks were investigated.
Hasan Şahan Arel, Blessen Skariah Thomas   +1 more
doaj   +1 more source

Experimental Approach on Sulfate Attack Mechanism of Ordinary Portland Cement Matrix: Part I. Sodium Sulfate Attack [PDF]

Journal of the Korea Concrete Institute, 2004
This paper introduces a study carried out to investigate sodium sulfate attack caused by various reactive products. Experiments were performed on mortar and paste specimens made with ordinary Portland cement (OPC) conforming to KS L 5201 Type I. The water-cement ratios were varied from 0.35 to 0.55. It was found from the laboratory study that the water-
Han-Young Moon, Seung-Tae Lee, Jong-Pil Kim   +2 more
openaire   +1 more source

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

Advanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari, Gokul Bhaskaran, Krishan Kumar, Yun Suk Huh, Young‐Kyu Han   +4 more
wiley   +1 more source

Durability and heavy metals leaching behavior of cemented paste backfill using chemical activated binary slag as binder under sulfate attack

Case Studies in Construction Materials
The present study conducted an extensive investigation into the durability of Na2SO4-activated binary slag cementitious materials for use in cemented paste backfill (CPB) under sulfate attack conditions.
Shiyu Zhang, Yingliang Zhao, Xiaoqiang Zhang, Kai Wang   +3 more
doaj   +1 more source