Search Results - "Provis, John L."

Geopolymers and other alkali activated materials: why, how, and what? by Provis, John L.

“…This paper presents a review of alkali-activation technology, moving from the atomic scale and chemical reaction path modelling, towards macroscopic…”
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Geopolymers and Related Alkali-Activated Materials by Provis, John L, Bernal, Susan A

“…The development of new, sustainable, low-CO 2 construction materials is essential if the global construction industry is to reduce the environmental footprint…”
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Chloride-induced corrosion of steel rebars in simulated pore solutions of alkali-activated concretes by Mundra, Shishir, Criado, Maria, Bernal, Susan A., Provis, John L.

“…The passivation and chloride-induced depassivation of steel rebars immersed in varying alkaline environments (0.80M, 1.12M and 1.36M NaOH solutions),…”
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Mechanisms of passivation and chloride-induced corrosion of mild steel in sulfide-containing alkaline solutions by Mundra, Shishir, Provis, John L.

“…The pore fluid within many concretes is highly alkaline and rich in reduced sulfur species, but the influence of such alkaline-sulfide solutions on the surface…”
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Geopolymer foam concrete: An emerging material for sustainable construction by Zhang, Zuhua, Provis, John L., Reid, Andrew, Wang, Hao

“…•A comprehensive review of current foam concrete technology and geopolymer technology.•A concept of developing geopolymer foam concrete with great…”
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Generalized Structural Description of Calcium–Sodium Aluminosilicate Hydrate Gels: The Cross-Linked Substituted Tobermorite Model by Myers, Rupert J, Bernal, Susan A, San Nicolas, Rackel, Provis, John L

“…Structural models for the primary strength and durability-giving reaction product in modern cements, a calcium (alumino)silicate hydrate gel, have previously…”
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Atomistic Simulations of Geopolymer Models: The Impact of Disorder on Structure and Mechanics by Lolli, Francesca, Manzano, Hegoi, Provis, John L, Bignozzi, Maria Chiara, Masoero, Enrico

“…Geopolymers are hydrated aluminosilicates with excellent binding properties. Geopolymers appeal to the construction sector as a more sustainable alternative to…”
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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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Toward an indexing approach to evaluate fly ashes for geopolymer manufacture by Zhang, Zuhua, Provis, John L., Zou, Jin, Reid, Andrew, Wang, Hao

“…Variations between fly ashes can lead to significant differences in the geopolymers derived from them, in both microstructural and mechanical properties. This…”
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Technical and commercial progress in the adoption of geopolymer cement by Van Deventer, Jannie S.J., Provis, John L., Duxson, Peter

“…CO2 emissions of various cement binders as a function of OPC content. [Display omitted] ► Alkali activated slag and ash cement has 80% less CO2 emissions than…”
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Quantitative kinetic and structural analysis of geopolymers. Part 2. Thermodynamics of sodium silicate activation of metakaolin by Zhang, Zuhua, Provis, John L., Wang, Hao, Bullen, Frank, Reid, Andrew

“…•ICC is confirmed again to be useful in studying the thermodynamics of geopolymerization.•Na-silicate activation of metakaolin at 25°C processes an extent of…”
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Evolution of binder structure in sodium silicate-activated slag-metakaolin blends by Bernal, Susan A, Provis, John L, Rose, Volker, De Gutierrez, Ruby Mejia

“…Structural evolution in pastes produced from alkali silicate-activated granulated blast furnace slag (GBFS)/metakaolin (MK) blends is assessed. In the initial…”
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Management and valorisation of wastes through use in producing alkali-activated cement materials by Bernal, Susan A, Rodríguez, Erich D, Kirchheim, Ana Paula, Provis, John L

“…There is growing global interest in maximising the re‐use and recycling of waste, to minimise the environmental impacts associated with waste treatment and…”
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Evaluation of the potential improvement in the environmental footprint of geopolymers using waste-derived activators by Passuello, Ana, Rodríguez, Erich D., Hirt, Eduardo, Longhi, Márlon, Bernal, Susan A., Provis, John L., Kirchheim, Ana Paula

“…Geopolymers produced from an aluminosilicate precursor and an alkaline activating solution have emerged as low carbon alternative binders which can substitute…”
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1000 at 1000: Geopolymer technology—the current state of the art by Grant Norton, M., Provis, John L.

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The interrelationship between surface chemistry and rheology in alkali activated slag paste by Kashani, Alireza, Provis, John L., Qiao, Greg G., van Deventer, Jannie S.J.

“…[Display omitted] •Surface chemistry controls rheology in alkali-activated slag cements.•Particle–particle interactions and gelation influenced by activator…”
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The Role of Al in Cross-Linking of Alkali-Activated Slag Cements by Myers, Rupert J., Bernal, Susan A., Gehman, John D., van Deventer, Jannie S.J., Provis, John L.

“…The structural development of a calcium (sodium) aluminosilicate hydrate (C–(N‐)A–S–H) gel system, obtained through the reaction of sodium metasilicate and…”
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Alkali-activated materials by Provis, John L.

“…This paper, which forms part of the UNEP White Papers series on Eco-Efficient Cements, provides a brief discussion of the class of cementing materials known as…”
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Influence of fly ash on the water and chloride permeability of alkali-activated slag mortars and concretes by Ismail, Idawati, Bernal, Susan A., Provis, John L., San Nicolas, Rackel, Brice, David G., Kilcullen, Adam R., Hamdan, Sinin, van Deventer, Jannie S.J.

“…•Addition of fly ash to alkali-activated slag mortars and concretes increases porosity and chloride permeability.•High-temperature pre-conditioning of samples…”
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MgO content of slag controls phase evolution and structural changes induced by accelerated carbonation in alkali-activated binders by Bernal, Susan A., San Nicolas, Rackel, Myers, Rupert J., Mejía de Gutiérrez, Ruby, Puertas, Francisca, van Deventer, Jannie S.J., Provis, John L.

“…The structural development and carbonation resistance of three silicate-activated slags (AAS) with varying MgO contents (<7.5wt.%) are reported. AAS with lower…”
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