There has been a continual increase in the number of large heavy vehicles nationwide since the review of the Austroads sprayed seal design method in 2001. This report aims to refine the traffic adjustment factor by updating and reanalysing the…
This report details of the performance of polymer modified binder (PMB) trial sites in South Australia and New South Wales after 12 months service life. It includes related information such as the seal designs, binder testing in the laboratory, site…
This report presents the results of a literature review and laboratory study which was conducted as part of the development of a new-long term ageing (durability) test for bituminous binders used in sprayed seals in Australia.
The literature review…
This report describes the planning and construction of Australian field trials which will measure of the relative performance of polymer modified binders (PMBs) used in strain alleviating membranes in sprayed bituminous sealing. Issues addressed in…
This document is an update of the design procedure for double/double sprayed seal surfacing. The information supersedes that in Update of the Austroads Sprayed Seal Design Method(Austroads 2006), and replaces Sections 6, 7 and 8 in that document.
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This report presents the results of a laboratory study to investigate development of a new durability test method that is acceptable for use in Australia. The study aimed to develop a more robust long-term ageing test method and resolve the issues…
Cutting solvents have been traditionally added to binders used in sprayed sealing in Australia and New Zealand to ensure that effective adhesion occurs between binder and aggregate. Recent Polymer modified binder (PMB) sealing failures, which have…
This report is the fourth in a series which examines the properties of bitumens used in Australia. The bitumen testing program was undertaken to develop a database of selected bitumen samples dating back to 1956. This database has been used to…
The majority of sprayed seal design methods around the world are based on the work of Hanson, published in 1935. However, there are growing weaknesses in current sprayed seal design models. Traffic loads have increased, particularly in both the…
