Rackel San Nicolas

Aggregate-Dependent Approach to Formulate and Predict Properties of High-Strength and Very-High-Strength Concrete

SK Baduge, P Mendis, R San Nicolas, M Rupasinghe, J Portella

Journal article  |  2020  |  Journal of Materials in Civil Engineering

The importance of selecting suitable aggregates in very-high-strength concrete (VHSC) (>100 MPa) and high-strength concrete (HSC) ..

Constructing a novel nano-TiO2/Epoxy resin composite and its application in alkali-activated slag/fly ash pastes

Jie Ren, Si-Yao Guo, Tie-Jun Zhao, Ji-Zhou Chen, Rackel San Nicolas, Lihai Zhang

Journal article  |  2020  |  Construction and Building Materials

A novel in-situ synthetic method is developed for fabrication of inorganic-organic hybrid structured TiO2/Epoxy resin composite wi..

Degradation process of alkali-activated slag/fly ash and Portland cement-based pastes exposed to phosphoric acid

Jie Ren, Lihai Zhang, Rackel San Nicolas

Journal article  |  2020  |  Construction and Building Materials

High costs are currently involved in the repair and replacement of sewage concrete pipes due to the severe damage caused by the ac..

Performance of lightweight hemp concrete with alkali-activated cenosphere binders exposed to elevated temperature

S Kristombu Baduge, P Mendis, R San Nicolas, K Nguyen, A Hajimohammadi

Journal article  |  2019  |  Construction and Building Materials

This study investigates the performance of three different types of cenosphere as a lightweight supplementary cementitious materia..

Strength Development and Thermogravimetric Investigation of High-Volume Fly Ash Binders

Zhiyuan Zhou, Massoud Sofi, Elisa Lumantarna, Rackel San Nicolas, Gideon Hadi Kusuma, Priyan Mendis

Journal article  |  2019  |  Materials

To address sustainability issues by facilitating the use of high-volume fly ash (HVFA) concrete in industry, this paper investigat..

Portland and other cements

Rackel San Nicolas, Brant Walkley, jannie van Deventer

Book Chapter  |  2019

This landmark publication distills the body of knowledge that characterizes mineral processing and extractive metallurgy as discip..

Fire performance of aerated alkali activated slag for unitised facade systems

KTQ Nguyen, RS Nicolas, P Mendis, T Ngo

Conference Proceedings  |  2019  |  FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger

New Structural Model of Hydrous Sodium Aluminosilicate Gels and the Role of Charge-Balancing Extra-Framework AI

Brant Walkley, Gregory J Rees, Rackel San Nicolas, Jannie SJ van Deventer, John V Hanna, John L Provis

Journal article  |  2018  |  The Journal of Physical Chemistry C

Nanostructural development of synthetic C-(N)-A-S-H gels revealed by multinuclear MQMAS NMR

Brant Walkley, gregory rees, R San Nicolas, J van Deventer, john hanna, john Provis

Conference Proceedings  |  2018

Structural evolution of synthetic alkali-activated CaO-MgO-Na2O-Al2O3-SiO2 materials is influenced by Mg content

Brant Walkley, Rackel San Nicolas, Marc-Antoine Sani, Susan A Bernal, Jannie SJ van Deventer, John L Provis

Journal article  |  2017  |  Cement and Concrete Research

Investigation of strength and hydration characteristics in nano-silica incorporated cement paste

Madhuwanthi Rupasinghe, Rackel San Nicolas, Priyan Mendis, Massoud Sofi, Ngo Tuan

Journal article  |  2017  |  Cement and Concrete Composites

Fly ash-based geopolymer chemistry and behavior

RVR San Nicolas, B Walkley, JSJ van Deventer

Book Chapter  |  2017

Molecular structure of alkali-activated cements as determined by solid state 27Al and 23Na MQMAS NMR

Brant Walkley, John Provis, gregory Rees, R San Nicolas, John HANNA, J van Deventer

Conference Proceedings  |  2017

The structures of synthetic alkali-activated cements are identified through application of 23Na and 27Al triple quantum magic angl..

Degradation of alkali-activated mortars in phosphoric acid-rich solution

Jie Ren, lihai Zhang, R San Nicolas

Conference Proceedings  |  2017

Thermal effects of activators on the setting time and rate of workability loss of geopolymers

Chandani Tennakoon, Rackel San Nicolas, Jay G Sanjayan, Ahmad Shayan

Journal article  |  2016  |  Ceramics International

Phase evolution of C-(N)-A-S-H/N-A-S-H gel blends investigated via alkali-activation of synthetic calcium aluminosilicate precursors

Brant Walkley, Rackel San Nicolas, Marc-Antoine Sani, Gregory J Rees, John V Hanna, Jannie SJ van Deventer, John L Provis

Journal article  |  2016  |  Cement and Concrete Research

Properties of cementitious mortar and concrete containing micro-encapsulated phase change materials

Amitha Jayalath, Rackel San Nicolas, Massoud Sofi, Robert Shanks, Tuan Ngo, Lu Aye, Priyan Mendis

Journal article  |  2016  |  Construction and Building Materials

Synthesis of stoichiometrically controlled reactive aluminosilicate and calcium-aluminosilicate powders

Brant Walkley, Rackel San Nicolas, Marc-Antoine Sani, John D Gehman, Jannie SJ van Deventer, John L Provis

Journal article  |  2016  |  Powder Technology

Comparison of creep behaviour of geopolymer concrete and OPC concrete

CH Un, JG Sanjayan, R SAN NICOLAS

Conference Proceedings  |  2016  |  Mechanics of Structures and Materials: Advancements and Challenges - Proceedings of the 24th Australasian Conference on the Mechanics of Structures and Materials, ACMSM24 2016

Alkali-activated slag cements produced with a blended sodium carbonate/sodium silicate activator

Susan A Bernal, Rackel San Nicolas, Jannie SJ van Deventer, John L Provis

Journal article  |  2016  |  Advances in Cement Research

Phase evolution of Na2O-Al2O3-SiO2-H2O gels in synthetic aluminosilicate binders

Brant Walkley, Rackel San Nicolas, Marc-Antoine Sani, John D Gehman, Jannie SJ van Deventer, John L Provis

Journal article  |  2016  |  Dalton Transactions

Characteristics of Australian brown coal fly ash blended geopolymers

Chandani Tennakoon, Kwesi Sagoe-Crentsil, Rackel San Nicolas, Jay G Sanjayan

Journal article  |  2015  |  Construction and Building Materials

Predictions of long-term deflection of geopolymer concrete beams

CH Un, JG Sanjayan, R San Nicolas, JSJ van Deventer

Journal article  |  2015  |  Construction and Building Materials

Role of carbonates in the chemical evolution of sodium carbonate-activated slag binders

Susan A Bernal, John L Provis, Rupert J Myers, Rackel San Nicolas, Jannie SJ van Deventer

Journal article  |  2015  |  Materials and Structures

Creep behaviour of geopolymer

CH Un, JG Sanjayan, R SAN NICOLAS, JSJ van Deventer

Conference Proceedings  |  2015

Modelling the Reactivity of Nano-silica in Cement Paste

M Rupasinghe, R SAN NICOLAS, P Mendis

Conference Proceedings  |  2015

Effect of MgO incorporation on the structure of synthetic alkali-activated calcium aluminosilicate binders

B Walkley, R SAN NICOLAS, SA Bernal, J Provis, JSJ van Deventer

Conference Proceedings  |  2015

Microstructure and durability of alkali-activated materials as key parameters for standardisation

JSJ Van Deventer, R SAN NICOLAS, I Ismail, SA Bernal, DG Brice, JL Provis

Journal article  |  2015  |  Journal of Sustainable Cement-Based Materials

Water content modifies the structural development of sodium metasilicate-activated slag binders

SA Bernal, R SAN NICOLAS, JSJ van Deventer, JL Provis

Journal article  |  2015  |  ALCONPAT Journal

The role of MgO content in the phase assemblage of alkali-activated synthetic precursors within the system CaO-MgO-Al₂O₃-SiO₂

B Walkley, R San Nicolas, SA Bernal, JL Provis, M SANI, JSJ van Deventer

Conference Proceedings  |  2015

The Interfacial Transition Zone in Alkali-Activated Slag Mortars

Rackel San Nicolas, John L Provis

Journal article  |  2015  |  Frontiers in Materials

Mini-beam test for assessing the creep trend of paste, mortar and concrete

CH Un, JG Sanjayan, R SAN NICOLAS, JSJ van Deventer

Conference Proceedings  |  2015  |  CONCREEP 10

Stoichiometrically controlled C–(A)–S–H/N–A–S–H gel blends via alkali-activation of synthetic precursors

B Walkley, JL Provis, R San Nicolas, M-A Sani, JSJ van Deventer

Journal article  |  2015  |  Advances in Applied Ceramics

Distinctive microstructural features of aged sodium silicate-activated slag concretes

Rackel San Nicolas, Susan A Bernal, Ruby Mejia de Gutierrez, Jannie SJ van Deventer, John L Provis

Journal article  |  2014  |  Cement and Concrete Research

Modelling the yield stress of ternary cement-slag-fly ash pastes based on particle size distribution

Alireza Kashani, Rackel San Nicolas, Greg G Qiao, Jannie SJ van Deventer, John L Provis

Journal article  |  2014  |  Powder Technology

Chemical characterisation of metakaolin and fly ash based geopolymers during exposure to solvents used in carbon capture

Laura E Gordon, Rackel San Nicolas, John L Provis

Journal article  |  2014  |  International Journal of Greenhouse Gas Control

Natural carbonation of aged alkali-activated slag concretes

Susan A Bernal, Rackel San Nicolas, John L Provis, Ruby Mejia de Gutierrez, Jannie SJ van Deventer

Journal article  |  2014  |  Materials and Structures

Performance-based approach to durability of concrete containing flash-calcined metakaolin as cement replacement

R San Nicolas, M Cyr, G Escadeillas

Journal article  |  2014  |  Construction and Building Materials

MgO content of slag controls phase evolution and structural changes induced by accelerated carbonation in alkali-activated binders

Susan A Bernal, Rackel San Nicolas, Rupert J Myers, Ruby Mejia de Gutierrez, Francisca Puertas, Jannie SJ van Deventer, John L Provis

Journal article  |  2014  |  Cement and Concrete Research

IMPLICATION OF MICROSTRUCTURE AND DURABILITY MEASURES FOR COMMERCIAL DEVELOPMENT OF ALKALI-ACTIVATED CONCRETES

Jannie SJ van Deventer, Rackel VR San Nicolas, Idawati Ismail, Susan A Bernal-Lopez, David G Brice, John L Provis

Conference Proceedings  |  2014  |  ADVANCES IN CHEMICALLY-ACTIVATED MATERIALS (CAM'2014)

Investigation of long term behaviour of composite geopolymer concrete beams under sustained loads

R SAN NICOLAS, CH Un

Conference Proceedings  |  2014

Durability and testing – Degradation via mass transport

SA Bernal, V Bílek, M Criado, A Fernández-Jiménez, E Kavalerova, PV Krivenko, M Palacios, A Palomo, JL Provis, F Puertas, R San Nicolas, C Shi, F Winnefeld

Book Chapter  |  2014  |  RILEM State-of-the-Art Reports

Modification of phase evolution in alkali-activated blast furnace slag by the incorporation of fly ash

Idawati Ismail, Susan A Bernal, John L Provis, Rackel San Nicolas, Sinin Hamdan, Jannie SJ van Deventer

Journal article  |  2014  |  Cement and Concrete Composites

Influence of fly ash on the water and chloride permeability of alkali-activated slag mortars and concretes

Idawati Ismail, Susan A Bernal, John L Provis, Rackel San Nicolas, David G Brice, Adam R Kilcullen, Sinin Hamdan, Jannie SJ van Deventer

Journal article  |  2013  |  Construction and Building Materials

Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation

Susan A Bernal, John L Provis, Brant Walkley, Rackel San Nicolas, John D Gehman, David G Brice, Adam R Kilcullen, Peter Duxson, Jannie SJ van Deventer

Journal article  |  2013  |  Cement and Concrete Research

Characteristics and applications of flash metakaolins

R San Nicolas, M Cyr, G Escadeillas

Journal article  |  2013  |  Applied Clay Science

Generalized Structural Description of Calcium-Sodium Aluminosilicate Hydrate Gels: The Cross-Linked Substituted Tobermorite Model

Rupert J Myers, Susan A Bernal, Rackel San Nicolas, John L Provis

Journal article  |  2013  |  Langmuir

Durability of different binders in synthetic agricultural effluents

S Larreur-Cayol, A Bertron, R SAN NICOLAS, G Escadeillas

Conference Proceedings  |  2011

Performance-based approach for durability of concrete containing flash metakaolin as cement replacement

R San Nicolas, M Cyr, G Escadeillas

Conference Proceedings  |  2010  |  Concrete under Severe Conditions: Environment and Loading - Proceedings of the 6th International Conference on Concrete under Severe Conditions, CONSEC'10