Results 41 to 50 of about 43,072 (255)

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

Evaluation of the SR Portland cement against sodium and magnesium sulfate attack: a physical and comparative analysis of mortars

Revista IBRACON de Estruturas e Materiais, 2018
Sulfate attack is a term used to describe a series of chemical reactions between sulfate ions and hydrated compounds of the hardened cement paste. Thus, the chemical composition of the binders used is important for the durability of the structure against
D. J. de SOUZA, M. H. F. MEDEIROS, J. HOPPE FILHO   +2 more
doaj   +2 more sources

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

Hierarchical Primary‐Secondary Coordination Synchronizes Ion Flux and Sulfur Redox in Solid Polymer Electrolytes

Advanced Functional Materials, EarlyView.
Hierarchical coordination engineering redistributes Li+ from anion‐dominated pairing toward polymer‐mediated binding. Strong primary sites promote salt dissociation, while distributed secondary sites sustain dynamic hopping pathways. This coordination landscape couples ion flux with polysulfide conversion, suppresses transport‐conversion decoupling ...
Zhong‐Wei Zheng, Jing‐Yu Li, Meng‐Che Tsai, Tsung‐I. Yeh, Wei‐Ming Huang, Mohamed Gamal Mohamed, Shiao‐Wei Kuo, Bing‐Joe Hwang, Yun‐Sheng Ye   +8 more
wiley   +1 more source

Combined influence and mechanism of superabsorbent polymers and waterborne epoxy coatings on the durability of self-curing concrete under compound sodium and magnesium sulfate attacks

Case Studies in Construction Materials
The corrosion of concrete structures near seawater leads to severe performance deterioration and significant economic losses. A novel method to enhance resistance to compound sulfate attack in concrete was investigated, where superabsorbent polymer (SAP)
Wenzhen Wang, Aiqin Shen, Juanlan Zhou, Obas John Ebohon, Qiwei Zhan   +4 more
doaj   +1 more source

Experiment Analysis of Concrete’s Mechanical Property Deterioration Suffered Sulfate Attack and Drying-Wetting Cycles

Advances in Materials Science and Engineering, 2017
The mechanism of concrete deterioration in sodium sulfate solution is investigated. The macroperformance was characterized via its apparent properties, mass loss, and compressive strength.
Wei Tian, Nv Han
doaj   +1 more source

Surface treatment with silicon-based nanoparticles in Portland cement specimens subjected to physical sulfate attack

Case Studies in Construction Materials, 2023
The use of simple (SN) or functionalized (FN) silicon nanoparticles in three variants of surface treatments to mitigate the physical sulfate attack was evaluated in mortar specimens made with ordinary portland cement (OPC) or sulfate resistant cement (SR)
Dione Silva, G. Fajardo-San-Miguel, Gilles Escadeillas, Dulce Cruz-Moreno   +3 more
doaj   +1 more source

Acid Site Design for Low Hydration Proton Exchange Membranes

Advanced Functional Materials, EarlyView.
α‐CF2 substitution adjacent to sulfonic acid increases acid strength and enables efficient proton transport under low hydration conditions. This molecular design reduces the dependence of hydrocarbon proton exchange membranes on excessive water uptake, addressing a key limitation of conventional hydrocarbon PEMs while maintaining favorable conductivity
Ajay Kumar, Lorena Alzate‐Vargas, Mayra Rodriguez‐Pena, Douglas I. Kushner, Marina Pacheco, Panagiotis Bexis, Ahmet Kusoglu, Siddharth Komini Babu, Edward F. Holby, Jacob S. Spendelow, Eun Joo S. Park   +10 more
wiley   +1 more source

Ultrafast Thermal Shock Synthesis of CuNiSnLa Medium‐Entropy Metallic Glass for Sustainable Nitrogen Fixation via Plasma‐Coupled Electrocatalysis

Advanced Functional Materials, EarlyView.
This work introduces an ultrafast thermal shock strategy to synthesize a CuNiSnLa medium‐entropy metallic glass (MEMG). The rapid heating and cooling process generates a robust, highly active catalyst for electrocatalytic nitrate reduction to ammonia (NRA).
Hongbo Chen, Peng‐Jun Deng, Yang Liu, Shenglong Huang, Shuo Sun, Haoxuan Li, Jiajia Lu, Panagiotis Tsiakaras   +7 more
wiley   +1 more source

Tailored Diketopyrrolopyrrole Derivatives for Efficient Deep‐Red Organic Lasers

Advanced Functional Materials, EarlyView.
Tailored diketopyrrolopyrrole derivatives exhibit high stable amplified spontaneous emission with single or dual bands. Incorporated into distributed‐feedback lasers based on one‐ and two‐dimensional dichromated‐gelatin diffractive gratings, these materials provide a robust, flexible platform for integrated organic deep‐red light sources. ABSTRACT Deep‐
Pablo Pasqués‐Gramage, Abelardo Sánchez‐Oliva, Álex Farrando‐Pérez, Pedro G. Boj, M. Victoria Gómez, Ana M. Rodríguez, Pilar Prieto, Rafael Muñoz‐Mármol, Andrew J. Musser, Iván Torres‐Moya, María A. Díaz‐García   +10 more
wiley   +1 more source