Institutions
|
About Us
|
Help
|
Gaeilge
0
1000
Home
Browse
Advanced Search
Search History
Marked List
Statistics
A
A
A
Author(s)
Institution
Publication types
Funder
Year
Limited By:
Subject = Concrete;
34 items found
Sort by
Title
Author
Item type
Date
Institution
Peer review status
Language
Order
Ascending
Descending
25
50
100
per page
1
2
Bibtex
CSV
EndNote
RefWorks
RIS
XML
Displaying Results 1 - 25 of 34 on page 1 of 2
Marked
Mark
A new methodology for determining thermal properties and modelling temperature development in hydrating concrete
(2010)
O'Donnell, John J.; O'Brien, Eugene J.
A new methodology for determining thermal properties and modelling temperature development in hydrating concrete
(2010)
O'Donnell, John J.; O'Brien, Eugene J.
Abstract:
A method is described for determining both the rate of heat generation and the time-dependent thermal properties of concrete so that the temperature development in a concrete section can be modelled. The method uses measured temperature data from concrete prisms and involves fitting data from the sample prisms of concrete to a simple theoretical heat-flow model. It is intended to facilitate on-site tests of concrete mixes; the resulting data can be used in computer models to predict the stresses that can lead to early thermal cracking in large pours. The method is tested by using the thermal properties obtained from the model to predict the temperature versus time profile at a number of locations in a large rectangular block of concrete and comparing these predictions with measured temperatures from the block.
Not applicable
Record needs to include a link to the DOI version of article - http://dx.doi.org/10.1016/S0950-0618(02)00099-5. DG 08/07/10 ke.kpw21/7/10
http://hdl.handle.net/10197/2302
Marked
Mark
Airborne non-contact and contact broadband ultrasounds for frequency attenuation profile estimation of cementitious materials
(2018)
Gosálbez, J.; Wright, William M. D.; Jiang, W.; Carrión, A.; Genovés, V.; Bosch, I.
Airborne non-contact and contact broadband ultrasounds for frequency attenuation profile estimation of cementitious materials
(2018)
Gosálbez, J.; Wright, William M. D.; Jiang, W.; Carrión, A.; Genovés, V.; Bosch, I.
Abstract:
In this paper, the study of frequency-dependent ultrasonic attenuation in strongly heterogeneous cementitious materials is addressed. To accurately determine the attenuation over a wide frequency range, it is necessary to have suitable excitation techniques. We have analysed two kinds of ultrasound techniques: contact ultrasound and airborne non-contact ultrasound. The mathematical formulation for frequency-dependent attenuation has been established and it has been revealed that each technique may achieve similar results but requires specific different calibration processes. In particular, the airborne non-contact technique suffers high attenuation due to energy losses at the air-material interfaces. Thus, its bandwidth is limited to low frequencies but it does not require physical contact between transducer and specimen. In contrast, the classical contact technique can manage higher frequencies but the measurement depends on the pressure between the transducer and the specimen. Cem...
http://hdl.handle.net/10468/5740
Marked
Mark
Assessment of Two Methods of Enhancing Thermal Mass Performance of Concrete Through the Incorporation of Phase-Change Materials
(2016)
Niall, Dervilla; West, Roger P.; McCormack, Sarah
Assessment of Two Methods of Enhancing Thermal Mass Performance of Concrete Through the Incorporation of Phase-Change Materials
(2016)
Niall, Dervilla; West, Roger P.; McCormack, Sarah
Abstract:
According to the IEA Technology Roadmap on Energy Efficient Building Envelopes, buildings are responsible for more than one third of global energy consumption, with space heating and cooling consuming 33% of this energy, and increasing to 50% in cold climates. Using the mass of a building to store heat and/ or cold can reduce the demand on the auxillary heating and/or cooling systems and hence reduce the overall energy demand of the building. In this study the thermal storage capacity of concrete was actively enhanced by integrating phase-change materials (PCMs) which provide a high latent heat storage capacity. Two methods of incorporating PCMs into concrete were used to form PCM/concrete composite panels. The first type of panel was formed by adding microencapsulated paraffin to fresh concrete during the mixing process. The second panel was formed by vacuum impregnating butyl stearate into lightweight aggregate which was then included in the concrete mix. The aim of the study was ...
https://arrow.dit.ie/sdar/vol4/iss1/1
Marked
Mark
Assessment of ultrasonic signals to determine the early age properties of concretes incorporating secondary cementitious materials
(2010)
O'Connell, M.; McNally, Ciaran; Donohue, Shane; Bonal, Julien; Richardson, Mark G.
Assessment of ultrasonic signals to determine the early age properties of concretes incorporating secondary cementitious materials
(2010)
O'Connell, M.; McNally, Ciaran; Donohue, Shane; Bonal, Julien; Richardson, Mark G.
Abstract:
Paper presented at Near Surface 2009, the 15th European Meeting of Environmental and Engineering Geophysics, 7-9 September 2009, Dublin, Ireland
Secondary cementitious materials (SCMs) such as ground granulated blast-furnace slag (GGBS) are used in increasing quantities in concrete practice internationally. While these materials offer benefits such as reduced CO2 and a more dense microstructure, they also have drawbacks in terms of slower initial gain of strength. There are significant financial implications associated with this, as it can lead to delays in the construction process. Key to overcoming this challenge is the development of a methodology to assess the early-age stiffness development in concretes manufactured using GGBS. This paper presents the results of a study into the application of ultrasonic sensors to assess the early age concrete stiffness. A novel wavelet-based approach is used to overcome the difficulties associated with wave reflections and classical wave ...
http://hdl.handle.net/10197/2267
Marked
Mark
Civil Engineering Research in Ireland 2018: Conference Proceedings
(2019)
Civil Engineering Research in Ireland 2018: Conference Proceedings
(2019)
Abstract:
Civil Engineering Research in Ireland 2018 (CERI 2018), Dublin, Ireland, 29-30 August 2018
On behalf of the Civil Engineering Research Association of Ireland (CERAI), I am delighted to welcome you to the Civil Engineering Research in Ireland 2018 (CERI2018) conference run in conjunction with Irish Transportation Research Network (ITRN) 2018 conference. This is the first time where the two have come together and I can only hope that we move from strength to strength in future. The Civil Engineering Research Association of Ireland (CERAI) was formed in 2012 for promoting civil engineering research and practice in Ireland, and its communication to academics and practitioners. The principal activity is the sponsoring and overseeing of the organisation of a conference series dedicated to this goal. The Civil Engineering Research in Ireland (CERI) conference series has grown initially from Concrete Research Ireland (CRI) and Bridge Research Ireland (BRI) symposiums, which subsequently...
http://hdl.handle.net/10197/10528
Marked
Mark
Contributions by Marie Sklodowska-Curie TRUSS-ITN towards reducing uncertainty in structural safety of buildings, roads, energy and marine infrastructure
(2018)
González, Arturo; Perrotta, Federico; Milana, Giulia; Sourav, Shah Nur Alam; Antonopoul...
Contributions by Marie Sklodowska-Curie TRUSS-ITN towards reducing uncertainty in structural safety of buildings, roads, energy and marine infrastructure
(2018)
González, Arturo; Perrotta, Federico; Milana, Giulia; Sourav, Shah Nur Alam; Antonopoulou, Sofia; McNally, Ciaran; et al.
Abstract:
The 3rd International Conference on Vulnerability and Risk Analysis and Management, 7th International Symposium on Uncertainty Modelling and Analysis and the 4th International Symposium on Uncertainty Quantification and Stochastic Modelling (ICVRAM-ISUMA-Uncertainties 2018), Florianópolis, Brazil, 8-11 April 2018
There is multitude of models available to assess structural safety based on a set of input parameters. As the degree of complexity of the models increases, the uncertainty of their output tends to decrease. However, more complex models typically require more input parameters, which may contain a higher degree of uncertainty. Therefore, it becomes necessary to find the balance that, for a particular scenario, will reduce the overall uncertainty (model + parameters) in structural safety. The latter is the objective of the Marie Sklodowska-Curie Innovative Training Network titled TRUSS (Training in Reducing Uncertainty in Structural Safety) funded by the EU Horizon 2020 re...
http://hdl.handle.net/10197/9412
Marked
Mark
Development of a test method towards assessing the soundness of concrete aggregates in service
(2008)
O'KELLY, BRENDAN C.
Development of a test method towards assessing the soundness of concrete aggregates in service
(2008)
O'KELLY, BRENDAN C.
http://hdl.handle.net/2262/67141
Marked
Mark
Developments in Intelligent Monitoring of Concrete Structures
(2010)
Chrisp, T. M.; Starrs, G.; McCarter, W. J.; Owens, E. H.; Nanukuttan, S. V.; Holmes, Ni...
Developments in Intelligent Monitoring of Concrete Structures
(2010)
Chrisp, T. M.; Starrs, G.; McCarter, W. J.; Owens, E. H.; Nanukuttan, S. V.; Holmes, Niall; Basheer, L.
Abstract:
Deterioration in concrete comprises an initiation period and a propagation period. The initiation period is characterised by changes that occur within the concrete in response to the exposure environment and continues until a stage is reached when damage begins to propagate. The propagation period begins at a point in time defined when a particular event occurs (e.g. loss of steel passivity due to chloride ingress) and continues until a specified limit state is reached. The initiation and propagation stages of a deterioration process result from a complex interaction of physical, chemical and electrochemical phenomena. Prediction of the field performance of reinforced concrete thus requires numerous data inputs, in particular, the response of the cover-zone concrete (covercrete) to the changing ambient environment in the vicinity of a specific structural element or part of a structure.
https://arrow.dit.ie/engschcivcon/11
Marked
Mark
Developments in Monitoring Techniques for Durability Assessment of Cover-zone Concrete
(2010)
McCarter, W.J.; Chrisp, T. M.; Starrs, G.; Holmes, Niall; Basheer, L.; Basheer, M.; Nan...
Developments in Monitoring Techniques for Durability Assessment of Cover-zone Concrete
(2010)
McCarter, W.J.; Chrisp, T. M.; Starrs, G.; Holmes, Niall; Basheer, L.; Basheer, M.; Nanukuttan, S. V.
Abstract:
This paper outlines developments in the use of an embedded multi-electrode sensor to study the response of the cover-zone (surface 50mm) to the changing ambient environment. The sensor enables the measurement of the spatial and temporal distribution of the electrical properties of concrete and temperature within the cover-zone thereby allowing an integrated assessment of cover-zone concrete performance. Both laboratory and field results are presented to highlight the information that can be obtained from embedded sensors. When exposed to the natural environment, the temperature dependence of the electrical response is highlighted and standardization protocols are developed to account for this effect. The monitoring system detailed also allows remote interrogation thereby providing (if required) a continuous output of real-time data and developments in this area are presented.
https://arrow.dit.ie/engschcivcon/13
Marked
Mark
Effective use of corrosion inhibitors in highway structures
(2010)
Richardson, Mark G.; McNally, Ciaran
Effective use of corrosion inhibitors in highway structures
(2010)
Richardson, Mark G.; McNally, Ciaran
Abstract:
Paper presented at the IABSE Symposium 'Improving Infrastructure Worldwide- brining people closer', Weimar, Germany, September 19-21, 2007
The corrosion of European concrete highway structures leads to traffic disruption, significant expenditure on remedial works and ultimately threatens to impact on European competitiveness. A potentially more efficient component in maintenance strategies is the use of surface applied corrosion inhibitors, which may delay the onset of corrosion or retard the corrosion rate of steel in concrete. This paper presents a proposed framework of guidelines for the effective use of corrosion inhibitors based on a study conducted as part of the EU Fifth Framework SAMARIS project. The proposed guidelines call for an initial desk study to assess the potential use of inhibitor and an assessment of risk control to the specifiers satisfaction. If necessary (for risk assessment and control) a preview trial is recommended, based on defined performance...
http://hdl.handle.net/10197/2305
Marked
Mark
Evaluating a New CEM III/A Cement for Concretes Exposed to Harsh Acid Rich Environments
(2016)
Thompson, David; Holmes, Niall; Reddy, John
Evaluating a New CEM III/A Cement for Concretes Exposed to Harsh Acid Rich Environments
(2016)
Thompson, David; Holmes, Niall; Reddy, John
Abstract:
The Irish Annex to the European specification, performance, production and conformity of concrete, IS EN 206, recommends CEM III/B cement for acid rich environments containing between 66 to 80% GGBS. However, BS 8500, the UK annex to EN 206 and the British Research Establishment (BRE) Special Digest 1, recommends CEM III/A cement with a GGBS range of 36-65%. This project investigated the performance of a new CEM III/A cement produced by Ecocem Ireland in concretes exposed to such environments using an extensive suite of laboratory tests. In Ireland, up to €5.8bn will be invested to provide fresh drinking water and clean wastewater. Concrete deterioration in wastewater treatment systems is mostly caused by sulphates and sulphuric acids found in aggressive chemical additives used. Due to the constant operational nature of these facilities, poor concrete performance leads to shut-downs with serious environmental consequences. The Department of Agriculture requires that all farm based c...
https://arrow.dit.ie/engschcivcon/89
Marked
Mark
Evaluating the structural capacity of concrete elements through in-situ instrumentation
(2013)
Byrne, David; Goggins, Jamie
Evaluating the structural capacity of concrete elements through in-situ instrumentation
(2013)
Byrne, David; Goggins, Jamie
Abstract:
The difficulty in predicting the long term load capacity of concrete elements is well documented. Time dependent effects such as creep and shrinkage coupled with varying loading events, particularly during construction, can all have an adverse effect on the long term performance of a concrete structure. This paper proposes a method that utilises in-situ instrumentation to predict the load carrying capacity of concrete members. During the construction of the Engineering building at the National University of Ireland, Galway over 260 sensors were embedded in a number of key concrete elements. The sensors are being continually monitored with the use of automatic datalogging equipment and the data is being used to monitor changes in geometric and material properties along with the subsequent time dependent deterioration of the elements. The paper will illustrate how the in-situ data from the demonstrator building can be used to estimate the real time behaviour of the concrete elements a...
http://www.ttp.net/978-3-03785-796-0.html
Marked
Mark
Expansive fracture agent behaviour for concrete cracking
(2012)
Laefer, Debra F.; Ambrozevitch-Cooper; Huynh, Minh-Phuoc; Midgette, J.; Ceribasi, Seyit...
Expansive fracture agent behaviour for concrete cracking
(2012)
Laefer, Debra F.; Ambrozevitch-Cooper; Huynh, Minh-Phuoc; Midgette, J.; Ceribasi, Seyit; Wortman, John
Abstract:
Increasing concerns regarding litigation and terrorism provide a strong dual motivation to decrease high explosives usage in the construction industry. This paper provides parameter considerations and initial guidelines for the application of expansive fracture agents, typically used for concrete and soft rock removal. This approach may be especially appropriate near environmentally and historically sensitive sites. Thirty-three unreinforced blocks (approximately a cubic meter each) of varying strengths composed of sand, cement, and flyash were tested under various temperature environments, with differing expansive agents, confinement levels, and post-cracking treatments. Cracking characteristics such as crack initiation and crack expansion were analyzed. Although the performance of expansive cement was dependent upon a highly complex set of variable interactions, higher ambient temperatures, higher agent mixture temperatures, and chemical configuration designed for colder temperatu...
http://hdl.handle.net/10197/3441
Marked
Mark
First Steps in Developing Cement-Based Batteries to Power Cathodic Protection of Embedded Steel in Concrete
(2015)
Holmes, Niall; Byrne, Aimee; Norton, Brian
First Steps in Developing Cement-Based Batteries to Power Cathodic Protection of Embedded Steel in Concrete
(2015)
Holmes, Niall; Byrne, Aimee; Norton, Brian
Abstract:
This paper presents the first steps in developing innovative cement-based batteries to power cathodic protection in reinforced concrete structures. Initial electrical outputs of 1.55V and 23mA have been found to be sufficient to polarise prescribed corrosion currents of 20mA per m2 of embedded steel. Cathodic protection is a well-developed and powerful technique to limit the effects of steel reinforcement corrosion. However, as it requires an electrical supply day and night, it is often powered by non-environmentally friendly diesel generators or connected to the electrical grid. This paper focuses on increasing the ionic conductivity of the solution in the cement pores, increasing the porosity of the cement, examining ways of sealing moisture into the cement and comparing different electrode materials and treatments. The batteries presented consist of different combinations of Portland cement, water, carbon black and salt solutions with embedded copper acting as the cathode and mag...
https://arrow.dit.ie/sdar/vol3/iss1/3
Marked
Mark
Fragility analysis of steel and concrete wind turbine towers
(2019)
Quilligan, Aidan; O'Connor, Alan; Pakrashi, Vikram
Fragility analysis of steel and concrete wind turbine towers
(2019)
Quilligan, Aidan; O'Connor, Alan; Pakrashi, Vikram
Abstract:
The tower is an essential component of a wind turbine assembly with its cost amounting to approximately 30% of the overall turbine costs for onshore installations. This paper investigates the relative performance of steel and concrete tower solutions for a selection of heights and wind speeds by means of a flapwise numerical model. For each case, elements of a baseline 5. MW wind turbine are used to model the components supported by the tower. The Lagrangian approach is used to establish the equations of motion of the dynamic system, allowing for the coupling of the tower and the system of blades. The analysis is performed for a range of typical tower heights from 88 to 120. m. Comparison of the relative performance of the two tower solutions is presented using fragility curves. This illustrates the probabilistic characteristics of limit state exceedance as a function of wind loading.
Irish Research Council for Science, Engineering and Technology
Banagher Precast Concrete Lt...
http://hdl.handle.net/10197/10425
Marked
Mark
Horizontal loading effects of fresh concrete on precast arches
(2019)
Cahill, Paul; Allen, E; Pakrashi, Vikram; O'Connor, Alan
Horizontal loading effects of fresh concrete on precast arches
(2019)
Cahill, Paul; Allen, E; Pakrashi, Vikram; O'Connor, Alan
Abstract:
This paper investigates the horizontal effect of fresh concrete on precast arches. A number of different models of horizontal pressure of fresh concrete are considered in this regard. The effects of fresh concrete on a precast arch are represented as a ratio of maximum normal stress from horizontal action of fresh concrete to the normal stress induced by the self-weight of the precast concrete arch. A parameter study on a number of geometric and operational variables was carried out. The implications of this horizontal loading from fresh concrete are discussed within the context of the potential financial effects.
http://hdl.handle.net/10197/10430
Marked
Mark
Incorporation of Life Cycle Models in determining Optimal Wind Energy Infrastructural Provision
(2012)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan
Incorporation of Life Cycle Models in determining Optimal Wind Energy Infrastructural Provision
(2012)
Cleary, Brendan; Duffy, Aidan; O'Connor, Alan
Abstract:
The deployment of wind energy has grown rapidly over the last two decades with an average annual growth rate of more than 26% since 1990. During this period the development and innovation of wind turbines has resulted in continual growth in wind turbine size with output ranges of 10-15MW likely to be deployed by 2020. This increased output has a knock-on effect on the growth of rotor diameters and tower heights. Wind turbine towers are required to become taller, stronger and stiffer in order to carry the increased weight and associated structural loading. Consequently, the dimensions of the tower cross-sections must be increased which results in manufacturing and transportation difficulties as well as increased material costs. Thus, this paper focuses on the development of wind energy technology over the last two decades and the optimisation techniques cited in current literature. From this, a multi-objective optimisation problem is defined as maximising the structural performance o...
https://arrow.dit.ie/engschcivcon/32
Marked
Mark
Meshfree Sequentially Linear Analysis of Concrete
(2016)
Al-Sabah, Salam; Laefer, Debra F.
Meshfree Sequentially Linear Analysis of Concrete
(2016)
Al-Sabah, Salam; Laefer, Debra F.
Abstract:
A new, meshfree method employing the node-based, smoothed point interpolation method (NS-PIM) is presented as an alternative to the nonlinear finite-element approach for concrete members. The nonlinear analysis is replaced by sequentially linear analyses (SLA), and a smeared, fixed concrete cracking model was used. A notched concrete beam was employed for validation. Using a crack band width factor of 2.0 and 10-mm nodal spacing, the peak load differed by only 3.5% from experimental results. Overall results were similar to experimental ones, as well as to those published by researchers using finite-element SLA. The approach provides two major advantages over finite-element-based SLA: (1) nodal distortion insensitivity, and (2) nodal spacing insensitivity.
European Research Council
http://hdl.handle.net/10197/7456
Marked
Mark
Numerical Asessment of The Thermal Performance of Structural Precast Panels
(2013)
Keenahan, Jennifer; Concannon, Karen; Hajializadeh, Donya; McNally, Ciaran
Numerical Asessment of The Thermal Performance of Structural Precast Panels
(2013)
Keenahan, Jennifer; Concannon, Karen; Hajializadeh, Donya; McNally, Ciaran
Abstract:
Numerical Modeling Strategies for Sustainable Concrete Structures, Aix-en-Provence, France, May 29 - June 1, 2012
With the increasing cost of energy the need to provide energy efficient buildings continues to grow. In 2003 the EU introduced the Energy Performance of Buildings Directive and this was enforced by all member states by 2006. The need to continually improve thermal performance has lead to member states implementing their own national initiatives, and from next year the National Standards Authority of Ireland will specify that all certified sandwich panel products comply with the incoming building regulations. The incoming building regulations stipulate that all sandwich panels achieve a U-value of 0.15 W/m2K, a reduction from the current value of 0.25 W/m2K. This is a significant challenge and requires that there be no significant heat loss through the panel. This paper presents the results of a collaborative project with a sandwich panel manufacturer whereby the ther...
http://hdl.handle.net/10197/4068
Marked
Mark
Numerical Model for Quantifying Degree of Hydration in Concrete Mixes with Reduced CO2 Footprint
(2013)
Attari, Azadeh; McNally, Ciaran; Richardson, Mark G.
Numerical Model for Quantifying Degree of Hydration in Concrete Mixes with Reduced CO2 Footprint
(2013)
Attari, Azadeh; McNally, Ciaran; Richardson, Mark G.
Abstract:
Numerical Modeling Strategies for Sustainable Concrete Structures, Aix-en-Provence, France, May 29- June1, 2012
The widespread application of innovative cementitious combinations in concrete raises the need for more comprehensive investigation of the resulting concrete properties. Early age behaviour is a major factor to be addressed, and tools are required for quantifying the hydration state of concrete members, particularly at early-ages. Numerical models can potentially be used in mass concrete construction to predict and prevent possible thermal crack formation. They also provide an indirect means for characterizing development of the hydration reaction in concrete. The latter can then be utilised in modelling and predicting secondary concrete properties, such as diffusion coefficient. This is gaining increasing importance as we harness the ability to develop innovative combinations. The cement industry is estimated to be responsible for about 7% of the carbon dioxide genera...
http://hdl.handle.net/10197/4067
Marked
Mark
O2O service composition with social collaboration
(2017)
Qian, Wenyi; Peng, Xin; Sun, Jun; Yu, Yijun; Nuseibeh, Bashar; Zhao, Wenyun
O2O service composition with social collaboration
(2017)
Qian, Wenyi; Peng, Xin; Sun, Jun; Yu, Yijun; Nuseibeh, Bashar; Zhao, Wenyun
Abstract:
In Online-to-Offline (O2O) commerce, customer services may need to be composed from online and offline services. Such composition is challenging, as it requires effective selection of appropriate services that, in turn, support optimal combination of both online and offline services. In this paper, we address this challenge by proposing an approach to O2O service composition which combines offline route planning and social collaboration to optimize service selection. We frame general O2O service composition problems using timed automata and propose an optimization procedure that incorporates: (1) a Markov Chain Monte Carlo (MCMC) algorithm to stochastically select a concrete composite service, and (2) a model checking approach to searching for an optimal collaboration plan with the lowest cost given certain time constraint. Our procedure has been evaluated using the simulation of a rich scenario on effectiveness and scalability.
http://hdl.handle.net/10344/6786
Marked
Mark
Performance-based Testing Methodology for Concrete Durability
(2009)
Holmes, Niall; Basheer, P. A.Muhammed; Nanukuttan, Sreejith; Basheer, Lulu
Performance-based Testing Methodology for Concrete Durability
(2009)
Holmes, Niall; Basheer, P. A.Muhammed; Nanukuttan, Sreejith; Basheer, Lulu
Abstract:
This report presents an overview of performance based testing methodology for concrete durability and work currently underway jointly at Queens University Belfast and Heriot Watt University, Edinburgh, to undertake this research under a EPSRC funded project (EP/G02152X/1). EN206-1 superseded BS 5328 on 1st December 2003 and allows designers and producers to use a wide range of cements and aggregate types for a variety of exposure conditions. In this new standard, the durability of concrete is specified in terms of the constituent materials of concrete, properties of fresh and hardened concrete, limitations for concrete composition, specification of concrete, delivery of fresh concrete, production control procedures, conformity criteria and evaluation of conformity and verification of these properties. Within this, six basic forms of exposure is also specified, namely XO (no risk of corrosion), XC (Corrosion induced by carbonation), XF (Freeze / thaw attack), XS (Corrosion induced by...
https://arrow.dit.ie/engschcivrep/2
Marked
Mark
Recycling plastic waste in cement composites for construction. Engineers Ireland Journal
(2019)
Pavia, Sara; Kaur, Gurbir
Recycling plastic waste in cement composites for construction. Engineers Ireland Journal
(2019)
Pavia, Sara; Kaur, Gurbir
Abstract:
Gurbir Kaur and Sara Pav?a explore the possibility of raising the amount of recycled plastic (34%) by replacing sand with plastic waste in mortars and concretes, as this would not only reduce plastic incineration and landfill but would also lower raw material extraction with the consequent economy in fuel and carbon emissions
http://hdl.handle.net/2262/91463
Marked
Mark
Response of a Simply Supported Beam with a Strain Rate Dependent Elasticity Modulus when Subjected to a Moving Load
(2015)
Aied, Hussein; González, Arturo
Response of a Simply Supported Beam with a Strain Rate Dependent Elasticity Modulus when Subjected to a Moving Load
(2015)
Aied, Hussein; González, Arturo
Abstract:
BCRI 12 - Bridge and Concrete Research in Ireland, Dublin, Ireland, 6-7 September, 2012
The structural response of a material to a load that is applied rapidly (dynamically) or applied very slowly (statically) can be considerably different. A vehicle moving across a concrete bridge represents an example of a dynamic load that is applied to a structure within a limited period of time that will depend on the velocity of the load. This paper explores the variation in the response of a beam when using a typical constant value or a time-variant value that depends on the strain experienced by the structure. Previous research has demonstrated that the static modulus of elasticity is smaller than the dynamic modulus. Some of this research is based on compression and tensile tests using samples where deformation is measured at one single location for different strain and stress rates, and they have led to formulas that allow characterizing the dynamic modulus as a function of strain rate...
http://hdl.handle.net/10197/6310
Marked
Mark
Salmonella enterica - biofilm formation and survival of disinfection treatment on food contact surfaces.
(2013)
Corcoran, Mary
Salmonella enterica - biofilm formation and survival of disinfection treatment on food contact surfaces.
(2013)
Corcoran, Mary
Abstract:
A recent report indicated that Salmonella was the most frequently identified agent in food-borne outbreaks in Europe. Salmonella can survive on surfaces and act as a source of cross-contamination. Biofilm formation may allow Salmonella enterica survival on surfaces and persistence in food processing environments for extensive periods of time. In 2008 there was a large food-borne outbreak of Salmonella Agona linked to a food processing facility. Prior to this outbreak, S. Agona was less frequently implicated in food-borne infections. The S. Agona strain SAGOXB.0066 and a variant strain remained in the environment for an extensive period of time. This lead to the hypothesis that the S. Agona strain may have a high propensity to form a biofilm and withstand disinfection treatment. The objectives of this research were to investigate if S. Agona SAGOXB.0066 may form a more dense biofilm than other S. enterica strains. Secondly, to investigate if S. enterica biofilm density increased over...
http://hdl.handle.net/10379/3515
Displaying Results 1 - 25 of 34 on page 1 of 2
1
2
Bibtex
CSV
EndNote
RefWorks
RIS
XML
Institution
Dublin Institute of Technology (10)
NUI Galway (3)
Trinity College Dublin (3)
University College Cork (1)
University College Dublin (16)
University of Limerick (1)
Item Type
Conference item (10)
Doctoral thesis (1)
Journal article (9)
Report (1)
Other (13)
Peer Review Status
Peer-reviewed (7)
Unknown (27)
Year
2019 (5)
2018 (2)
2017 (2)
2016 (5)
2015 (2)
2013 (5)
2012 (2)
2010 (7)
2009 (2)
2008 (2)
built by Enovation Solutions