Ytbehandlingar: försök med modifierade emulsioner och långa fraktioner
2007 (Swedish)Report (Other academic)
This report describes the monitoring and the experience of two full scale trials with surface dressing. In one of them modified emulsion was tested on the primary road 84 between Kasteln-Laforsen in the county Hälsingland in the north of Sweden. The test sections were produced during year 2001. A second full scale trial test was carried through during year 2004 with the purpose to optimise the utilizing of the stone aggregate (chippings) with different types of fractions 4-8, 4-16 and 8-16 mm. This trial was carried through on the secondary road 723 between Heden and Färila also in the county Hälsingland. In addition to testing different types of binders, the effect of breaking additive was studied in the respects of how soon the surface dressing could be swept from excess of loose stones after the surface treatment was carried out and the time of the year the surface treatment was carried out. The test sections have been monitored with respect to macro texture, rut depth, longitudinal evenness and noise emission as well as by visual inspections of damages and defects. In addition to this the laboratory testing of the wear resistance and the testing of the sensibility to the effect of water have been carried out. For this purpose a modified laboratory test method (Prall method), for surface dressing, has been used. During the production phase of the surface dressing some advantages were noticed by the use of polymer modified bitumen emulsion with the addition of a breaking additive. In principle the method is to inject the breaking additive into the emulsion just before spreading of the bituminous emulsion on the road. The stone aggregate was fixed to the road surface after a relatively short time which made it possible to sweep the surface treatment from the excess of loose stones after a few hours after the production of the surface treatment. Modified bitumen emulsion combined with the breaking additive showed consequently positive effects for the road users through better accessibility and a less risk of loose stones damaging the vehicles.
Place, publisher, year, edition, pages
Linköping: VTI., VTI notat 14-2007 , 2007. , 68 p.
Surface dressing, Modified bitumen, Emulsion, Binder, Additive, Aggregate, Experimental road, Test, Macrotexture, Rutting, Evenness, Noise, Wear, Season
Research subject Road: Materials, Road: Bituminous materials and binders; Road: Highway design, Road: Surfacing
IdentifiersURN: urn:nbn:se:vti:diva-1646OAI: oai:DiVA.org:vti-1646DiVA: diva2:670358