A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An important function of a road surface course is providing skid resistance. Periodically, after polishing by traffic, this layer needs replacing to restore skid resistance to an appropriate level. UK, materials specifications require premium aggregates with a good resistance to polishing. These are becoming increasingly expensive and sources are few. Sustainable development demands consideration of alternatives such as industrial by-products. The by-product of the Basic Oxygen Steel (BOS) process is the main type of steel slag produced in the UK (approximately 1.2 million tonnes annually), with about 10% utilisation in roads and agriculture at present. BOS slag has been used in surface courses for many years, but mainly within steelworks complexes or on local roads nearby. Consequently, most performance information is anecdotal, with no independent, systematic study of the skid resistance of the material. TRL has been carrying out a study of BOS slag used in surface courses in the UK, on behalf of the Tarmac Group. The main objective was increased use of slag, simultaneously reducing demand for landfill and crushed rock. The purpose of the research was to establish evidence for the performance of the material in road surfacings, with a particular emphasis on skid resistance. In-service skid resistance has been monitored at eight sites on UK main roads, including a purpose-laid comparative trial. This is assessing performance over time compared with the skid resistance requirements for those locations. The project has included supporting laboratory studies of BOS slag from the different UK sources, including microscopy; petrographic analysis and laboratory aggregate polishing tests. The three-year programme of practical work was due to be completed in September 2002, and this paper presents some of the findings.
An important function of a road surface course is providing skid resistance. Periodically, after polishing by traffic, this layer needs replacing to restore skid resistance to an appropriate level. UK, materials specifications require premium aggregates with a good resistance to polishing. These are becoming increasingly expensive and sources are few. Sustainable development demands consideration of alternatives such as industrial by-products. The by-product of the Basic Oxygen Steel (BOS) process is the main type of steel slag produced in the UK (approximately 1.2 million tonnes annually), with about 10% utilisation in roads and agriculture at present. BOS slag has been used in surface courses for many years, but mainly within steelworks complexes or on local roads nearby. Consequently, most performance information is anecdotal, with no independent, systematic study of the skid resistance of the material. TRL has been carrying out a study of BOS slag used in surface courses in the UK, on behalf of the Tarmac Group. The main objective was increased use of slag, simultaneously reducing demand for landfill and crushed rock. The purpose of the research was to establish evidence for the performance of the material in road surfacings, with a particular emphasis on skid resistance. In-service skid resistance has been monitored at eight sites on UK main roads, including a purpose-laid comparative trial. This is assessing performance over time compared with the skid resistance requirements for those locations. The project has included supporting laboratory studies of BOS slag from the different UK sources, including microscopy; petrographic analysis and laboratory aggregate polishing tests. The three-year programme of practical work was due to be completed in September 2002, and this paper presents some of the findings.
Skid resistance performance of road surfaces utilising BOS slag aggregate
Griffigkeit von Straßenbelägen bei Einsatz von LD-Schlacken als Zuschlagstoff
Roe, P.G. (author)
2003
13 Seiten, 5 Bilder, 2 Tabellen
Conference paper
English
Skid resistance of road surfaces
| Engineering Index Backfile | 1939
Skid Resistance of Bituminous Surfaces
| NTIS | 1967
Non-skid bituminous treatments for road surfaces
| Engineering Index Backfile | 1947