Browsing Critical Infrastructure Group by Author "Richardson, Mark G."

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Browsing Critical Infrastructure Group by Author "Richardson, Mark G."

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Assessment of ultrasonic signals to determine the early age properties of concretes incorporating secondary cementitious materials

O'Connell, M. ; McNally, Ciaran ; Donohue, Shane ; Bonal, Julien ; Richardson, Mark G. (2009-09)

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 ...
Biochemical attack on concrete in wastewater applications : a state of the art review

O'Connell, M. ; McNally, Ciaran ; Richardson, Mark G. (Elsevier, 2010-08)

The costs associated with the provision and maintenance of drinking water and wastewater infrastructure represents a significant financial demand worldwide. Maintenance costs are disproportionately high, indicating a lack ...
Chloride diffusion coeficient determination for specifications

McNally, Ciaran ; Richardson, Mark G. ; Evans, Conor ; Callanan, Thomas (Thomas Telford, 2005)

The chloride diffusion resistance of reinforced concrete can have a major influence on durability. A move to performance-based specifications is therefore to be encouraged in the case of highway structures, where the client ...
Development of calcium sulfate - ggbs - Portland cement binders

O'Rourke, Brian ; McNally, Ciaran ; Richardson, Mark G. (Elsevier, 2009-01)

Binders manufactured using a blend of gypsum, ground granulated blast furnace slag and Portland cements are technically viable and possess considerable environmental and economic advantages when compared to binders ...
Domain size as a parameter for studying the potential alkali-silica reactivity of chert-bearing aggregates

McNally, Ciaran ; Richardson, Mark G. ; Carr, A. J. (Alun J.) ; Strogen, Peter (Institution of Civil Engineers, 2004-05)

The presence of chert or flint in aggregates used for concrete manufacture has long been a source of concern in the context of alkali-silica reactivity. The global in-service performance of chert and flint-bearing aggregates, ...
Effective use of corrosion inhibitors in highway structures

Richardson, Mark G. ; McNally, Ciaran (IABSE, 2007-09)

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 ...
Performance of high alkali slag concretes in the context of alkali-silica reaction

Hester, David ; McNally, Ciaran ; Richardson, Mark G. (2003-02)

The depletion of natural resources, the requirement for sustainable development and environmental restrictions, such as those associated with the Kyoto Agreement, makes the re-use of waste materials increasingly important ...
The performance of Irish aggregates in the 'ultra-accelerated test' for alkali-aggregate reactivity with particular reference to chert content

McNally, Ciaran ; Richardson, Mark G. (2000-06)

Irish aggregates have a satisfactory history of service regarding alkali-aggregate reaction despite containing significant amounts of chert and use for a period in conjunction with cements of high alkali level. An investigation ...
Reactivity assessment of aggregates : the role of chert crystallinity

McNally, Ciaran ; Richardson, Mark G. (2005-05)

A systematic assessment scheme for determining the alkali reactivity of aggregates has been developed for international use. Expansion tests were conducted on Irish aggregates. Aggregates were subjected to a sequence of ...
Significance of the concentration of chloride in the repair of concrete highway structures using surface applied corrosion inhibitors

Richardson, Mark G. ; Grimes, E. ; McNally, Ciaran ; Söylev, T. A. (Taylor & Francis, 2005-11)

Advances in surface-applied corrosion inhibitors suggest that they have the potential to prevent or significantly retard corrosion of steel in reinforced concrete structures. It is thought that the effectiveness of the ...
A study of the influence of slag alkali level on the alkali-silica reactivity of slag concrete

Hester, David ; McNally, Ciaran ; Richardson, Mark G. (Elsevier, 2005-11)

Ground granulated blast furnace slag (ggbs), can reduce the alkali load in concrete, despite its relatively high alkali content. Most research has been devoted to the efficacy of slag with an alkali content of less than ...