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ASCP Forum – Maintenance of Concrete Road Pavements – Specifications & Materials

Aspcp-forum-on-demand

Sydney has a very large network of State and Local Government concrete roads built from the mid 1920s to the 1950s.  There is an increasing need for slab replacements, but with worksite access typically limited to a single night shift.  Using CSA rapid set cement, there are now 12 years...

Airport Infrastructure – From History to the Future

Ascp-forum-presentation

Luc Ramalinga presents on Airport Infrastructure - From History to the Future. Objective of this Presentation: - Give an insight of how a client approaches airport pavement management - The History of Airport Pavements - The Impact and Opportunities of COVID-19 - Future Research Opportunities

Macro Synthetic Fibres – Potential Uses in Pavements [MSFRC]

Ascp-forum-presentation

Presentation Overview What are Macro Synthetic Fibres Review of Current Practice (Global, National, Domestic & SRAs/DoTs) Current and potential applications Recommendations What are Macro Synthetic Fibres? Available commercially since the early 2000s Intended to be used as a replacement for steel mesh reinforcement and not for structural steel design. Manufactured...

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Pavimentos De Hormigón Sostenibles: Reducido Impacto Ambiental De Los Pavimentos De Hormigón (Pavement Note 002) [Spanish, español]

Ascp-pavement-note, Technical-report

LOS PAVIMENTOS DE HORMIGÓN Y SU REDUCIDO IMPACTO AMBIENTAL Los pavimentos de hormigón causan menor impacto ambiental que los pavimentos asfálticos. Esta nota resume los últimos hallazgos que comparan los aspectos de sostenibilidad de las dos principales opciones de pavimentos para tráfico pesado. A su vez, proporciona a los organismos...

Application of a Shrinkage Reducing Agent (SRA) in Concrete Pavements

Conference-paper-ascp, Ascp-conference-presentation

SRAs have been used in concrete in Australia since their introduction into the marketplace in the mid1990s. However, its recent application in a major road project in NSW has generated interest from Government bodies, engineers and contractors within this sector of the construction industry. The author therefore wishes to discuss...

Performance of Silicone Sealants in Sawn Joints

Conference-paper-ascp, Ascp-conference-presentation

Concrete pavement joints are required to be sealed to prevent the ingress of debris, mainly incompressible and water. In the year of 2012, there are a number of reports of pavement joint sealants losing adhesion within the first 5 years of service and eventually being mostly depressed under the wheel...

Merits and Challenges of Increasing Limestone Addition in Cement Used in Concrete Pavement Construction

Conference-paper-ascp, Ascp-conference-presentation

Portland cement has undergone much change in recent decades to cater for rapid construction cycles, longer design life and environmental pressure. Increased fineness, the advent of Portland blended cements incorporating one or more supplementary cementitious materials (SCMs), and reduced clinker content via mineral addition have been the key technological solutions...

New Developments in Rapid Set Concrete Slab Replacements

Conference-paper-ascp, Ascp-conference-presentation

Current and future eras are seeing an operational environment where road occupancy for pavement maintenance or repairs will be severely restricted under conditions of maximising availability for service traffic and access to roadside properties. A key driving force for concrete pavement slab replacement, where required, is the need to use...

Latest Developments for Roller Compacted Concrete (RCC) in USA

Conference-paper-ascp, Ascp-conference-presentation

Roller Compacted Concrete (RCC) is a no slump concrete that is placed by a high density paver and compacted with vibratory rollers similar to asphalt pavement construction. RCC has long history of good performance as a pavement for ports, container yards and manufacturing plants. This paper will summarise a recent...

New Method of Paving Concrete Production

Conference-paper-ascp, Ascp-conference-presentation

Modern concrete pavements are based on sophisticated blends of cements, often containing SCM, graded nonreactive aggregates and various admixtures, all of which are aimed at producing the most durable pavement possible. Placement techniques also incorporate the use of various curing compounds, which again are aimed at producing durable concrete. However,...

A designer’s perspective on unplanned shrinkage cracking in plain concrete road pavements

Conference-paper-ascp, Ascp-conference-presentation

Unplanned shrinkage cracking in plain concrete pavements can be prevented by adequate jointing design, material selection and the use of good construction practice. This paper provides a series of notes on the construction challenges and design aspects that need to be considered to avoid unplanned cracking when constructing a new...

Geopolymer and High Volume Fly Ash Concrete for Pavements

Conference-paper-ascp, Ascp-conference-presentation

Much interest has been shown in improving the sustainable performance of concrete. The use of cement replacement materials and geopolymer concrete offers benefits in terms of reduced carbon footprint and enhanced properties. This paper reviews the properties of geopolymer concrete and concrete with high levels of cement replacement materials relevant...