Outline 2020 tested our flexural capacity and at times strained our mental tensile strength to 85% yield. To maintain tradition, ASCP has worked hard to develop a unique line-up of papers and delivery format for its 6th Concrete Pavements Conference which was delivered in August 2021. Like previous biennial conferences,...
Partnering for innovative solutions in concrete paving: A tour of a few key concrete states in North America
Tim Nash presents on Partnering for innovative solutions in concrete paving. The presentation covers: General overview of US concrete paving market (Covid effect, spending outlook and market characteristics) Paving manufacturer focuses (mold design, frame/chasis design, control systems, attachments) Discussion of various recent projects (Interstate, local roads, safety barriers)
Macro Synthetic Fibres – Potential Uses in Pavements [MSFRC]
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...
New Developments in Rapid Set Concrete Slab Replacements
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
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...
Design Of Ultrathin Fiber Reinforced Concrete Pavements
A new methodology has been developed to design the concrete slab thickness by optimizing the slab size given the geometry of the truck axles, the design is based on an unbonded system with either granular, HMA, Stabilized or Concrete Base. The key principle of the design method is to configure...
New Method of Paving Concrete Production
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,...
Geopolymer and High Volume Fly Ash Concrete for Pavements
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...
Use of recycled concrete aggregates in concrete pavements
The quality of the input of fine and coarse aggregates for concrete has an influence on the quality and consistency of the new concrete, and this is particularly applicable when recycled concrete aggregates (RCA) are incorporated in the concrete. The overseas literature indicates that where substitutions do not exceed 20%,...
Innovation allowing more paving time ….and less of everything else
Innovation Allowing More Paving Time....and less of everything elsePresented byJohn EisenhourNational Sales ManagerGuntert & Zimmerman How to be Successful at Concrete Paving Today You Must... Get it Smooth the First Time Get it Smooth the First Time Get in, Get Out and Stay Out! Get in, Get Out and Stay...
Use of Manufactured Sand in Concrete Pavement
Recent research by the Cement Concrete & Aggregates Australia (CCAA) focused on the selection of manufactured sands for general concrete applications and for concrete road pavements. Selected manufactured sands can be used as part of the fine aggregates to deliver workable concrete for general applications and to provide good skid...
Implications of Using Manufactured Fine Aggregates in Concrete Pavements
The International Center for Aggregates Research has been performing research on the use of manufactured fine aggregates (MFA) for over 15 years. The first issue was the high amounts of micro fines, i.e. minus 75 μmm, that typically exceed the amounts permitted by ASTM C33 in the production of concrete....