Search Results - "San Nicolas, Rackel"

Degradation process of alkali-activated slag/fly ash and Portland cement-based pastes exposed to phosphoric acid by Ren, Jie, Zhang, Lihai, San Nicolas, Rackel

“…•AASF pastes display a higher resistance to phosphoric acid than OPC regardless of pH.•AASF pastes exhibited an induction period during the phosphoric acid…”
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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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Modification of phase evolution in alkali-activated blast furnace slag by the incorporation of fly ash by Ismail, Idawati, Bernal, Susan A., Provis, John L., San Nicolas, Rackel, Hamdan, Sinin, van Deventer, Jannie S.J.

“…The microstructural evolution of alkali-activated binders based on blast furnace slag, fly ash and their blends during the first six months of sealed curing is…”
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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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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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Sustainable utilisation of low-grade and contaminated waste glass fines as a partial sand replacement in structural concrete by Wang, Tianchun, Nicolas, Rackel San, Kashani, Alireza, Ngo, Tuan

“…Waste glass stockpiling is a significant issue in Australia with approximately 66 kilo tonnes of uneconomic and contaminated waste glass fines being produced…”
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Strength Development and Thermogravimetric Investigation of High-Volume Fly Ash Binders by Zhou, Zhiyuan, Sofi, Massoud, Lumantarna, Elisa, San Nicolas, Rackel, Hadi Kusuma, Gideon, Mendis, Priyan

“…To address sustainability issues by facilitating the use of high-volume fly ash (HVFA) concrete in industry, this paper investigates the early age hydration…”
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Investigation of strength and hydration characteristics in nano-silica incorporated cement paste by Rupasinghe, Madhuwanthi, San Nicolas, Rackel, Mendis, Priyan, Sofi, Massoud, Ngo, Tuan

“…A hydration model for Portland cement pastes modified with nano-silica in partial substitution is formulated based on the nucleation growth process from…”
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Degradation of Alkali-Activated Slag and Fly Ash Mortars under Different Aggressive Acid Conditions by Ren, Jie, Zhang, Lihai, San Nicolas, Rackel

“…AbstractAcidic environments constitute serious chemical threats to concrete-like cementitious materials. The purpose of this study is to experimentally…”
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Sustainable oyster shell incorporated artificial reef concrete for living shorelines by Rupasinghe, Madhuwanthi, Nicolas, Rackel San, Lanham, Brendan S., Morris, Rebecca L.

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Phase evolution of C-(N)-A-S-H/N-A-S-H gel blends investigated via alkali-activation of synthetic calcium aluminosilicate precursors by Walkley, Brant, San Nicolas, Rackel, Sani, Marc-Antoine, Rees, Gregory J., Hanna, John V., van Deventer, Jannie S.J., Provis, John L.

“…Stoichiometrically-controlled alkali-activated pastes containing calcium-(sodium) aluminosilicate hydrate (C-(N)-A-S-H) and sodium aluminosilicate hydrate…”
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Experimental and numerical study of long-term alkali-silica reaction (ASR) expansion in mortar with recycled glass by Wang, Tianchun, San Nicolas, Rackel, Ngoc Nguyen, Tuan, Kashani, Ali, Ngo, Tuan

“…Recycled glass has been demonstrated to be a sustainable alternative for sand in concrete, which can tackle the stockpiling of waste glass and shortage of…”
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Structural evolution of synthetic alkali-activated CaO-MgO-Na2O-Al2O3-SiO2 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.

“…Stoichiometrically controlled alkali-activated materials within the system CaO-MgO-Na2O-Al2O3-SiO2 are produced by alkali-activation of high-purity synthetic…”
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Constructing a novel nano-TiO2/Epoxy resin composite and its application in alkali-activated slag/fly ash pastes by Ren, Jie, Guo, Si-Yao, Zhao, Tie-Jun, Chen, Ji-Zhou, Nicolas, Rackel San, Zhang, Lihai

“…•A novel TiO2/Epoxy resin composite was applied to the manufacture of AASF pastes.•AASF pastes display better mechanical properties because of a densified…”
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Aggregate-Dependent Approach to Formulate and Predict Properties of High-Strength and Very-High-Strength Concrete by Kristombu Baduge, Shanaka, Mendis, Priyan, San Nicolas, Rackel, Rupasinghe, Maduwanthi, Portella, Joanne

“…AbstractThe importance of selecting suitable aggregates in very-high-strength concrete (VHSC) (>100  MPa) and high-strength concrete (HSC) (50–100 MPa)…”
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Effect of calcined clays from Victoria, Australia as cement substitution in ternary blended cement systems by San Nicolas, Rackel, Wang, Tianchun, Rupasinghe, Madhuwanthi

“…Due to the high embodied carbon of cement and limited availability of conventional supplementary cementitious materials (SCMs), calcined clay has gained…”
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Natural carbonation of aged alkali-activated slag concretes by Bernal, Susan A., San Nicolas, Rackel, Provis, John L., Mejía de Gutiérrez, Ruby, van Deventer, Jannie S. J.

“…Alkali-activated slag concretes stored for 7 years under atmospheric conditions are assessed, and the structural characteristics of naturally carbonated…”
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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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The Interfacial Transition Zone in Alkali-Activated Slag Mortars by San Nicolas, Rackel, Provis, John L.

“…The interfacial transition zone (ITZ) is known to strongly influence the mechanical and transport properties of mortars and concretes. This paper studies the…”
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