Search Results - "Walkley, Brant"

The role of zinc in metakaolin-based geopolymers by Wang, Lei, Geddes, Daniel A., Walkley, Brant, Provis, John L., Mechtcherine, Viktor, Tsang, Daniel C.W.

“…Geopolymers are low-calcium, sustainable cementitious materials. The role of Zn, a known retardant used in Portland cement, in geopolymer systems is not well…”
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Basic oxygen furnace (BOF) slag as an additive in sodium carbonate-activated slag cements by Stefanini, Laura, Walkley, Brant, Provis, John L.

“…Basic oxygen furnace slag (BOFS) is a high-volume waste resulting from the production of steel from pig iron. Due to its high free lime content, BOFS is…”
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Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation by Bernal, Susan A., Provis, John L., Walkley, Brant, San Nicolas, Rackel, Gehman, John D., Brice, David G., Kilcullen, Adam R., Duxson, Peter, van Deventer, Jannie S.J.

“…Binders formed through alkali-activation of slags and fly ashes, including ‘fly ash geopolymers’, provide appealing properties as binders for low-emissions…”
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Thermal performance of calcium-rich alkali-activated materials: A microstructural and mechanical study by Kashani, Alireza, Ngo, Tuan D., Walkley, Brant, Mendis, Priyan

“…•Computed tomography showed thermally induced changes in pores of concrete.•Expansion of pores reduced surface cracking via water vapour pressure…”
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Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1 by Li, Xuerun, Snellings, Ruben, Antoni, Mathieu, Alderete, Natalia Mariel, Ben Haha, Mohsen, Bishnoi, Shashank, Cizer, Özlem, Cyr, Martin, De Weerdt, Klaartje, Dhandapani, Yuvaraj, Duchesne, Josée, Haufe, Johannes, Hooton, Doug, Juenger, Maria, Kamali-Bernard, Siham, Kramar, Sabina, Marroccoli, Milena, Joseph, Aneeta Mary, Parashar, Anuj, Patapy, Cedric, Provis, John L., Sabio, Sergio, Santhanam, Manu, Steger, Laurent, Sui, Tongbo, Telesca, Antonio, Vollpracht, Anya, Vargas, Felipe, Walkley, Brant, Winnefeld, Frank, Ye, Guang, Zajac, Maciej, Zhang, Shizhe, Scrivener, Karen L.

“…A primary aim of RILEM TC 267-TRM: “Tests for Reactivity of Supplementary Cementitious Materials (SCMs)” is to compare and evaluate the performance of…”
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Effects of kaolinite and montmorillonite calcined clays on the sulfate balance, early hydration, and artificial pore solution of limestone calcined clay cements (LC3) by da Silva, Micael Rubens Cardoso, Andrade Neto, Jose da Silva, Walkley, Brant, Kirchheim, Ana Paula

“…This study investigated the physicochemical effects of kaolinite (CK) and montmorillonite (CM) calcined clays on the sulfate balance, early hydration, and…”
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Characterizing oxygen atoms in perovskite and pyrochlore oxides using ADF-STEM at a resolution of a few tens of picometers by Mostaed, Ali, Walkley, Brant, Hatnean, Monica Ciomaga, Balakrishnan, Geetha, Lees, Martin R., Beanland, Richard, Sinclair, Derek C., Reaney, Ian M.

“…We present an aberration corrected scanning transmission electron microscopy (ac-STEM) analysis of perovskite (LaFeO3) and pyrochlore (Yb2Ti2O7 and Pr2Zr2O7)…”
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New Structural Model of Hydrous Sodium Aluminosilicate Gels and the Role of Charge-Balancing Extra-Framework Al by Walkley, Brant, Rees, Gregory J, San Nicolas, Rackel, van Deventer, Jannie S. J, Hanna, John V, Provis, John L

“…A new structural model of hydrous alkali aluminosilicate gel (N-A-S-H) frameworks is proposed, in which charge-balancing extra-framework Al species are…”
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Multi-year cementitious hydrate product formation in non-Portland high performance concretes by Geddes, Daniel A., Walkley, Brant, Matsuda, Taku, Provis, John L.

“…This paper describes the hydration products and microstructural formation processes that yield excellent mechanical properties in “zero-cement concretes” (ZCC)…”
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Investigating the retarding effect of CAC in alkali-activated cements by Stefanini, Laura, Walkley, Brant, Provis, John L.

“…This paper discusses the design of hybrid alkali-activated binders at ambient temperature, specifically the development of mixes based on ground granulated…”
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Carbonation rate of alkali-activated concretes and high-volume SCM concretes: a literature data analysis by RILEM TC 281-CCC by Gluth, Gregor J. G., Ke, Xinyuan, Vollpracht, Anya, Weiler, Lia, Bernal, Susan A., Cyr, Martin, Dombrowski-Daube, Katja, Geddes, Daniel A., Grengg, Cyrill, Le Galliard, Cassandre, Nedeljkovic, Marija, Provis, John L., Valentini, Luca, Walkley, Brant

“…The current understanding of the carbonation and the prediction of the carbonation rate of alkali-activated concretes is complicated inter alia by the wide…”
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Spectroscopic identification of Ca-bearing uranyl silicates formed in C–S–H systems by Yorkshire, Antonia S., Stennett, Martin C., Walkley, Brant, Provis, John L., Townsend, Luke T., Haigh, Latham T., Hyatt, Neil C., Mottram, Lucy M., Corkhill, Claire L.

“…Portland cement-based grouts used for radioactive waste immobilisation contain a Ca- and Si-rich binder phase, known as calcium–silicate–hydrate (C–S–H)…”
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Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders by Walkley, Brant, San Nicolas, Rackel, Sani, Marc-Antoine, Gehman, John D., van Deventer, Jannie S.J., Provis, John L.

“…Aluminosilicate and calcium-aluminosilicate powders are synthesised via an organic steric entrapment route under conditions permitting strict stoichiometric…”
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Capture of aqueous radioiodine species by metallated adsorbents from wastestreams of the nuclear power industry: a review by Robshaw, Thomas J., Turner, Joshua, Kearney, Sarah, Walkley, Brant, Sharrad, Clint A., Ogden, Mark D.

“…Iodine-129 poses a significant challenge in the drive towards lowering radionuclide emissions from used nuclear fuel recycling operations. Various techniques…”
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Spectroscopic evaluation of UVI–cement mineral interactions: ettringite and hydrotalcite by Yorkshire, Antonia S., Stennett, Martin C., Walkley, Brant, O'Sullivan, Sarah E., Mottram, Lucy M., Bailey, Daniel J., Provis, John L., Hyatt, Neil C., Corkhill, Claire L.

“…Portland cement based grouts used for radioactive waste immobilization contain high replacement levels of supplementary cementitious materials, including…”
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The influence of curing temperature on the strength and phase assemblage of hybrid cements based on GGBFS/FA blends by Henning, Ricky, Sturm, Patrick, Geddes, Daniel A., Keßler, Sylvia, Walkley, Brant, Gluth, Gregor J. G.

“…Hybrid cements are composites made of Portland cement or Portland clinker and one or more supplementary cementitious materials like slag, fly ash or…”
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Structural evolution of synthetic alkali-activated CaO-MgO-Na 2 O-Al 2 O 3 -SiO 2 materials is influenced by Mg content by Walkley, Brant, San Nicolas, Rackel, Sani, Marc-Antoine, Bernal, Susan A., van Deventer, Jannie S.J., Provis, John L.

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Functionality screening to help design effective materials for radioiodine abatement by Robshaw, Thomas J., Turner, Joshua, Tuck, Olivia, Pyke, Caroline, Kearney, Sarah, Simoni, Marco, Sharrad, Clint A., Walkley, Brant, Ogden, Mark D.

“…This paper is part of a growing body of research work looking at the synthesis of an optimal adsorbent for the capture and containment of aqueous radioiodine…”
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Degradation resistance of different cementitious materials to phosphoric acid attack at early stage by Ren, Jie, Zhang, Lihai, Walkley, Brant, Black, Jay R., San Nicolas, Rackel

“…Sewer wastewater systems pose great threats to OPC-based concretes used for pipes due to the presence of various acids. Phosphoric acid can cause as much…”
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Metakaolin-based geopolymers: Relation between formulation, physicochemical properties and efflorescence formation by Longhi, Márlon A., Rodríguez, Erich D., Walkley, Brant, Zhang, Zuhua, Kirchheim, Ana Paula

“…The efflorescence formation in metakaolin-based geopolymers is assessed in this study to provide a better understanding of the effect of the synthesis…”
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