Experiences on Low Temperature (LT) Asphalts in Hungarian Road Building

The use of low temperature (LT) asphalt products can result in a significant decrease of temperature (up to 250°C) required for asphalt production. This, in turn, reduces energy costs and consumption. Moreover, safety during asphalt production and laying improves, especially in the case of mastic asphalt production, because the amount of potentially harmful vapors and aerosols decreases. Temperature decrease, in addition to the above, reduces the short-term aging of bitumen in the asphalt production process, and ultimately has a positive impact on the durability of pavements.It is a high priority on the innovation agenda of COLAS Group Hungary to promote the application of low temperature asphalt products in Hungarian road construction. The company is conducting a wide range of laboratory tests in the Central Laboratory of Colas Hungária Zrt. on different sorts of normal and modified bitumens, various types of viscosity modifying additives and diverse asphalt mixes. Said laboratory tests include compaction tests with Marshall test and gyrators at various temperatures, as well as mechanical tests on asphalt such as wheel tracking, water sensitivity, modulus and fatigue.In addition to the laboratory tests carried out, we have laid test sections in the past three years in road sections of diverse traffic load, on municipality roads, on low traffic roads within the state public road network and on some motorway sections as well.The presentation summarizes the findings of the laboratory tests and the experience gained from the test sections.


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  • Accession Number: 01488225
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 9 2013 9:12AM