ORCID Profile
0000-0002-2013-0668
Current Organisation
University of New South Wales - Randwick Campus
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Construction Materials | Civil Engineering | Building Science and Techniques | Structural Engineering | Environmental Rehabilitation (excl. Bioremediation) | Materials Conservation | Acoustics and Noise Control (excl. Architectural Acoustics) |
ANZSRC Socio-Economic Objective (SEO)
Cement and Concrete Materials | Climate Change Adaptation Measures | Urban and Industrial Air Quality | Civil Construction Design | Management of Noise and Vibration from Transport Activities | Management of Solid Waste from Manufacturing Activities | Cement Products and Concrete Materials
Related Links
Publications
Regulating the chemical foaming reaction to control the porosity of geopolymer foams
Publisher: Elsevier BV
Date: 04-2017
Characterising fundamental properties of foam concrete with a non-destructive technique
Publisher: Informa UK Limited
Date: 08-10-2019
Solid Reactant-Based Geopolymers from Rice Hull Ash and Sodium Aluminate
Publisher: Springer Science and Business Media LLC
Date: 15-10-2017
Microstructural study of environmentally friendly boroaluminosilicate geopolymers
Publisher: Elsevier BV
Date: 07-2018
Dissolution behaviour of source materials for synthesis of geopolymer binders: A kinetic approach
Publisher: Elsevier BV
Date: 08-2016
Effect of recycled glass fines on mechanical and durability properties of concrete foam in comparison with traditional cementitious fines
Publisher: Elsevier BV
Date: 05-2019
Unveiling the underlying mechanisms of tensile behaviour enhancement in fibre reinforced foam concrete
Publisher: Elsevier BV
Date: 09-2023
How does aluminium foaming agent impact the geopolymer formation mechanism?
Publisher: Elsevier BV
Date: 07-2017
The effects of surfactants on properties of lightweight concrete foam
Publisher: Thomas Telford Ltd.
Date: 02-2020
Abstract: Lightweight concrete foam is mainly used as a filling for sandwich panels for insulation of buildings. Surfactants are chemical admixtures that play an important role in stabilising the air pores in fresh concrete foam before stiffening. This study investigates the effects of surfactants on the microstructure and pore characteristics of concrete foam analysed by X-ray microtomography. The formation of larger pores due to poor stability of bubbles in the concrete foam is directly related to a substantial reduction of compressive strength. Anionic (negatively charged) surfactants produce a stable aqueous foam. However, in the presence of cement particles, the majority of anionic surfactants adsorb on positively charged sites of cement particles. As the result of considerable migration of surfactants from the air–liquid interface of bubbles, the concrete foam is destabilised. Therefore, a surfactant that can generate a stable foam (with water only) may not be able to generate a stable concrete foam. A combination of an anionic and a non-ionic (neutral) surfactant reduced the maximum pore diameter from 1·84 mm to 1·49 mm and increased strength by 25% compared to the concrete foam stabilised by anionic surfactants alone.
Effect of Alumina Release Rate on the Mechanism of Geopolymer Gel Formation
Publisher: American Chemical Society (ACS)
Date: 25-08-2010
DOI: 10.1021/CM101151N
Smart-Phone Obesity Prevention Trial for Adolescent Boys in Low-Income Communities: The ATLAS RCT
Publisher: American Academy of Pediatrics (AAP)
Date: 09-2014
Abstract: The goal of this study was to evaluate the impact of the Active Teen Leaders Avoiding Screen-time (ATLAS) intervention for adolescent boys, an obesity prevention intervention using smartphone technology. ATLAS was a cluster randomized controlled trial conducted in 14 secondary schools in low-income communities in New South Wales, Australia. Participants were 361 adolescent boys (aged 12–14 years) considered at risk of obesity. The 20-week intervention was guided by self-determination theory and social cognitive theory and involved: teacher professional development, provision of fitness equipment to schools, face-to-face physical activity sessions, lunchtime student mentoring sessions, researcher-led seminars, a smartphone application and Web site, and parental strategies for reducing screen-time. Outcome measures included BMI and waist circumference, percent body fat, physical activity (accelerometers), screen-time, sugar-sweetened beverage intake, muscular fitness, and resistance training skill competency. Overall, there were no significant intervention effects for BMI, waist circumference, percent body fat, or physical activity. Significant intervention effects were found for screen-time (mean ± SE: –30 ± 10.08 min/d P = .03), sugar-sweetened beverage consumption (mean: –0.6 ± 0.26 glass/d P = .01), muscular fitness (mean: 0.9 ± 0.49 repetition P = .04), and resistance training skills (mean: 5.7 ± 0.67 units P & .001). This school-based intervention targeting low-income adolescent boys did not result in significant effects on body composition, perhaps due to an insufficient activity dose. However, the intervention was successful in improving muscular fitness, movement skills, and key weight-related behaviors.
Pore characteristics in one-part mix geopolymers foamed by H 2 O 2 : The impact of mix design
Publisher: Elsevier BV
Date: 09-2017
Performance of lightweight hemp concrete with alkali-activated cenosphere binders exposed to elevated temperature
Publisher: Elsevier BV
Date: 11-2019
Lower activity levels are related to higher plantar pressures in overweight children
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 02-2015
Characterisation of One-Part Geopolymer Binders Made from Fly Ash
Publisher: Springer Science and Business Media LLC
Date: 20-05-2017
Sustainable one-part geopolymer foams with glass fines versus sand as aggregates
Publisher: Elsevier BV
Date: 05-2018
Effects of surface treatments of recycled tyre crumb on cement-rubber bonding in concrete composite foam
Publisher: Elsevier BV
Date: 05-2018
Glass waste versus sand as aggregates: The characteristics of the evolving geopolymer binders
Publisher: Elsevier BV
Date: 08-2018
Modified asphalt by coffee cup Fibres: An optimum mix design using response surface method
Publisher: Elsevier BV
Date: 10-2023
Physical properties of Australian hurd used as aggregate for hemp concrete
Publisher: Elsevier BV
Date: 09-2020
A sustainable application of recycled tyre crumbs as insulator in lightweight cellular concrete
Publisher: Elsevier BV
Date: 04-2017
High strength/density ratio in a syntactic foam made from one-part mix geopolymer and cenospheres
Publisher: Elsevier BV
Date: 09-2019
School-based obesity prevention interventions: Practicalities and considerations
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.ORCP.2013.10.004
Abstract: Pediatric obesity continues to be a major public health concern. Once established it is difficult to treat, therefore well-designed and evaluated prevention interventions are vitally important. Schools have an important role in the prevention of childhood obesity, however, their involvement can be limited by a number of constraints and barriers, which need to be considered when designing interventions. Members of the Prevention Stream of the Australasian Child and Adolescent Obesity Research Network have extensive experience in implementing and evaluating school-based obesity prevention initiatives. Based on their collective experience and evidence from implementation research, the aim of this paper was to highlight six areas to consider when designing, implementing and evaluating obesity prevention initiatives in schools. Further, this paper aimed to provide guidance for overcoming some of the challenges and barriers faced in school-based obesity prevention research. The six key areas discussed include: design and analysis school-community engagement planning and recruitment evaluation implementation and feedback and sustainability.
The Physical Activity 4 Everyone Cluster Randomized Trial
Publisher: Elsevier BV
Date: 08-2016
DOI: 10.1016/J.AMEPRE.2016.02.020
Abstract: Few interventions have been successful in reducing the physical activity decline typically observed among adolescents. The aim of this paper is to report the 24-month effectiveness of a multicomponent school-based intervention (Physical Activity 4 Everyone) in reducing the decline in moderate to vigorous physical activity (MVPA) among secondary school students in disadvantaged areas of New South Wales, Australia. A cluster RCT was conducted in five intervention and five control schools with follow-up measures taken at 24 months post-randomization. The trial was undertaken within secondary schools located in disadvantaged communities in New South Wales, Australia. A multicomponent school-based intervention based on the Health Promoting Schools Framework was implemented. The intervention consisted of seven physical activity promotion strategies that targeted the curriculum (teaching strategies to increase physical activity in physical education lessons, student physical activity plans, and modification of school sport program) school environment (recess/lunchtime activities, school physical activity policy) parents (parent newsletters) and community (community physical activity provider promotion). Six additional strategies supported school implementation of the physical activity intervention strategies. Minutes per day spent in MVPA, objectively measured by accelerometer. Participants (N=1,150, 49% male) were a cohort of students aged 12 years (Grade 7) at baseline (March-June 2012) and 14 years (Grade 9) at follow-up (March-July 2014). At 24-month follow-up, there were significant effects in favor of the intervention group for daily minutes of MVPA. The adjusted mean difference in change in daily MVPA between groups was 7.0 minutes (95% CI=2.7, 11.4, p<0.002) (analysis conducted December 2014-February 2015). Sensitivity analyses based on multiple imputation were consistent with the main analysis (6.0 minutes, 95% CI=0.6, 11.3, p<0.031). The intervention was effective in increasing adolescents' minutes of MVPA, suggesting that implementation of the intervention by disadvantaged schools has the potential to slow the decline in physical activity. Australian New Zealand Clinical Trials Registry ACTRN12612000382875.
One-Part Geopolymer Mixes from Geothermal Silica and Sodium Aluminate
Publisher: American Chemical Society (ACS)
Date: 29-10-2008
DOI: 10.1021/IE8006825
Interfacial chemistry of a fly ash geopolymer and aggregates
Publisher: Elsevier BV
Date: 09-2019
The effect of silica availability on the mechanism of geopolymerisation
Publisher: Elsevier BV
Date: 03-2011
Time-resolved and spatially-resolved infrared spectroscopic observation of seeded nucleation controlling geopolymer gel formation
Publisher: Elsevier BV
Date: 05-2011
DOI: 10.1016/J.JCIS.2011.02.045
Abstract: The effect of seeded nucleation on the formation and structural evolution of one-part ("just add water") geopolymer gels is investigated. Gel-forming systems are seeded with each of three different oxide nanoparticles, and seeding is shown to have an important role in controlling the silica release rate from the solid geothermal silica precursor, and in the development of physical properties of the gels. Nucleation accelerates the chemical changes taking place during geopolymer formation. The nature of the seeds affects the structure of the growing gel by affecting the extent of phase separation, identified by the presence of a distinct silica-rich gel in addition to the main, more alumina-rich gel phase. Synchrotron radiation-based infrared microscopy (SR-FTIR) shows the effect of nucleation on the heterogeneous nanostructure and microstructure of geopolymer gels, and is combined with data obtained by time-resolved FTIR analysis to provide a more holistic view of the reaction processes at a level of detail that has not previously been available. While spatially averaged (ATR-FTIR) infrared results show similar spectra for seeded and unseeded s les which have been cured for more than 3 weeks, SR-FTIR results show marked differences in gel structure as a result of seeding.
Exploring changes in physical activity, sedentary behaviors and hypothesized mediators in the NEAT girls group randomized controlled trial
Publisher: Elsevier BV
Date: 2014
DOI: 10.1016/J.JSAMS.2013.02.003
Abstract: To evaluate the impact of a 12-month school-based multi-component program on adolescent girls' physical activity and sedentary behaviors, and hypothesized mediators of physical activity behavior change. Group randomized controlled trial with 12-month follow-up. The intervention, guided by Social Cognitive Theory, involved 357 adolescent girls (13.2 ± 0.5 years) from 12 secondary schools (6 intervention schools, 6 control schools) in low-income communities in the Hunter and Central Coast regions of New South Wales, Australia. The intervention included enhanced school sport, lunchtime physical activity sessions, interactive seminars, student handbooks, nutrition workshops, pedometers, parent newsletters and text messages to encourage physical activity and healthy eating, and a decrease in sedentary behavior. Outcomes were assessed at baseline and 12-months and included: physical activity (accelerometers), sedentary behaviors (questionnaire and accelerometers), and social-cognitive mediators of physical activity (questionnaire). There were significant between group differences in favor of the intervention group for self-reported recreational computer use (-26.0 min 95% CI, -46.9 to -5.1), and sedentary activities summed (-56.4 min 95% CI, -110.1 to -2.7), however objective sedentary behavior showed no differences. There were no group-by-time effects for any of the physical activity outcomes or hypothesized mediators. A school-based intervention tailored for adolescent girls from schools located in low-income communities significantly reduced time spent in sedentary activities. However, improvements in physical activity and hypothesized mediators of physical activity behavior were not observed. Future studies are encouraged to explore alternative mechanisms of behavior change derived from integrated and socio-ecological theories.
Nanostructural characterization of geopolymers by advanced beamline techniques
Publisher: Elsevier BV
Date: 02-2013
A novel eco-friendly foaming technique for developing sustainable glass foams from the waste glass
Publisher: Elsevier BV
Date: 03-2023
Powder sintering and gel casting methods in making glass foam using waste glass: A review on parameters, performance, and challenges
Publisher: Elsevier BV
Date: 2022
Alkali activated slag foams: The effect of the alkali reaction on foam characteristics
Publisher: Elsevier BV
Date: 03-2017
Mechanism of PVA Fiber Influence in Foam Concrete: From Macroscopic to Microscopic View
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2023
Chemo‐mechanical properties of carbon fiber reinforced geopolymer interphase
Publisher: Wiley
Date: 11-10-2021
DOI: 10.1111/JACE.18150
Abstract: Geopolymers, as a potentially environmentally friendly alternative to Portland cement, are increasingly attracting attention in the construction industry. Various methods have been applied for customizing the properties of geopolymers and improving their commercial viability. One of the promising methods for refining the properties of geopolymers such as their toughness is the use of short fibers. The effectiveness of a high‐strength short fiber in the geopolymer matrix is largely dependent on the interfacial bonding between the fiber and its surrounding matrix. While the importance of this interfacial chemistry is highlighted in the literature, the characteristics of this bonding structure have not been fully understood. In this paper, we aim to investigate the bonding mechanism between the carbon fiber and metakaolin‐based geopolymer matrix. For the first time, the existence and nature of the chemical bonding at the interfacial region (interphase) between carbon fiber and geopolymer matrix has been revealed. X‐ray pair distribution function computed tomography (PDF‐CT), field emission‐scanning electron microscopy imaging, and nanoindentation techniques are employed to discern the chemo‐mechanical properties of the interphase. PDF‐CT results show the emergence of a new atom–atom correlation at the interfacial region (around 1.82 Å). This correlation is a characteristic of interfacial bonding between the fiber and its surrounding matrix, where the existence of chemical linkages (potentially V Al‐O‐C) between fibers and the matrix contributes to the adhesion between the two constituents making up the composite. Due to such chemical bonding, the nanomechanical properties of the interfacial region fall between that of the carbon fiber and geopolymer. The combination of advanced techniques is proved useful for enhancing our understanding of the interfacial chemistry between fibers and the binding matrix. This level of knowledge facilitates the engineering of composite systems through the manipulation of their nanostructure.
Cross-laminated timber–concrete composite structural floor system: A state-of-the-art review
Publisher: Elsevier BV
Date: 12-2021
Rationale and study protocol for the ‘Active Teen Leaders Avoiding Screen-time’ (ATLAS) group randomized controlled trial: An obesity prevention intervention for adolescent boys from schools in low-in
Publisher: Elsevier BV
Date: 2014
DOI: 10.1016/J.CCT.2013.11.008
Abstract: The negative consequences of unhealthy weight gain and the high likelihood of pediatric obesity tracking into adulthood highlight the importance of targeting youth who are 'at risk' of obesity. The aim of this paper is to report the rationale and study protocol for the 'Active Teen Leaders Avoiding Screen-time' (ATLAS) obesity prevention intervention for adolescent boys living in low-income communities. The ATLAS intervention will be evaluated using a cluster randomized controlled trial in 14 secondary schools in the state of New South Wales (NSW), Australia (2012 to 2014). ATLAS is an 8-month multi-component, school-based program informed by self-determination theory and social cognitive theory. The intervention consists of teacher professional development, enhanced school-sport sessions, researcher-led seminars, lunch-time physical activity mentoring sessions, pedometers for self-monitoring, provision of equipment to schools, parental newsletters, and a smartphone application and website. Assessments were conducted at baseline and will be completed again at 9- and 18-months from baseline. Primary outcomes are body mass index (BMI) and waist circumference. Secondary outcomes include BMI z-scores, body fat (bioelectrical impedance analysis), physical activity (accelerometers), muscular fitness (grip strength and push-ups), screen-time, sugar-sweetened beverage consumption, resistance training skill competency, daytime sleepiness, subjective well-being, physical self-perception, pathological video gaming, and aggression. Hypothesized mediators of behavior change will also be explored. ATLAS is an innovative school-based intervention designed to improve the health behaviors and related outcomes of adolescent males in low-income communities.
Enhancing the strength of pre-made foams for foam concrete applications
Publisher: Elsevier BV
Date: 03-2018
Initial sequence for alkali-silica reaction: Transport barrier and spatial distribution of reaction products
Publisher: Elsevier BV
Date: 11-2019
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Related Funding Activities
Linkage Projects - Grant ID: LP200200779
Start Date: 10-2021
End Date: 10-2024
Amount: $230,636.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210200285
Start Date: 07-2022
End Date: 07-2025
Amount: $210,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP200100531
Start Date: 12-2021
End Date: 12-2024
Amount: $384,117.00
Funder: Australian Research Council
View Funded Activity