AT Central is proud to present an on-line workshop during which feedback will be given on the recent Eurasphalt & Eurobitume Congress. During this event, promising young new professional colleagues will be presenting some of the newest developments in the fields of asphalt and bitumen technology. This webinar has been registered for CPD accreditation. CPD
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How do you predict and, critically, prevent asphalt pavement failure due to moisture sensitivity? Our specialist presenters will provide solutions in the form of test methodologies, case studies and technologies to help you avoid potentially costly damage. Moisture susceptibility is a primary cause of distress in asphalt surfaced pavements. Asphalt mixes are susceptible to moisture
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SAT is pleased to introduce the 5th edition of Sabita’s Manual 5. This revision takes account of recent developments in the design of asphalt as reflected in Sabita Manuals 35 and 24, which will impact the construction of asphalt layers. Manual 5 defines and describes the principles and best practice procedures for the production and
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Asphalt (AC) in the 21st Century is very different from asphalt made 100 years ago. With binder modification, sophisticated aggregate crushing techniques, a plethora of additives and the introduction of nano technology, asphalt (AC) has rapidly become a “super-construction material”.
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Georges Mturi points out that about 30% of bitumen used in asphalt in South Africa is modified. In this paper he discusses the context, typical additives used, guidelines and specifications, as well as selection and classification of additives.
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Aggregate properties need to be clearly defined in terms of both specification and testing to ensure compliance. To support this, Ray Bonser reviews the relevant specifications including historic factors, the introduction of COLTO 1998, the Aspasa Exclusion Clauses, the current SANS 1083:2018 Edition 2.6 specification and proposed revisions to SANS 1083.
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Nico shares Roadlab’s expertise in this field, starting with tests currently used to determine material properties before treatment/stabilization/modification, followed by the properties of Nano Modified Emulsion (NME) treated materials together with testing technologies and procedures.
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Ensure that the project mix materialises on site by sticking to some basic principles. This presentation enlarges on the basics such as quality control of mixes containing reclaimed asphalt (RA), consistency of RA fractions in the mix, aspects to consider at stockpiles, moisture content, and finally sampling, testing and acceptance control as for conventional asphalt mixes.
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With the advent of the new Revision Of COTO Standard Specifications For Road & Bridge Works For State Road Authorities, the onus for the submission of asphalt mix designs now lies with the contractor. A thorough and sound understanding of the principles & goals involved in the mix design procedure is required…
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The pros and cons of both standard and “new age” field and laboratory permeability testing methods. The author warns that an accurate void determination method is critical to high levels of correlation, no matter which tests you choose. By Joanne Muller.
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