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Analysis of data obtained from percostations: differences between data obtained from air cooled blast furnace slagand natural geological materials
2008 (English)Student paper otherStudent thesis
Abstract [en]

During rehabilitation of 16 km at the road 563 between Sjulsmark and Ersnäs Norrbotten County, Sweden in 2006, a 800m long test road was constructed. Three different fractions of Air Cooled Blast Furnace Slag were used. The fractions were 0/63, 0/125 and unsorted material. In addition normal crushed stone was used in one section as a reference. The test road was built by SSAB Tunnplåt AB, SSAB Merox, the Swedish Road Administration Northern region and BDX AB. The purpose was to evaluate Air Cooled Blast Furnace Slag as a road construction material and compare it with normal geological rock materials. A second purpose was to update “ATB Väg” and “ATB Hyttsten”. The test road was divided into 8 parts each part being 100m long. This study deals with the fifth part of the test road, which was constructed using unsorted Air Cooled Blast Furnace Slag and compacted by using ring compactors. Air Cooled Blast Furnace slag (Hyttsten) is a byproduct produced in steel industry was used for 30 years. A Percostation, which is used to measure and visualize measured parameters like dielectric constant (Dielectricity), Electrical Conductivity and Temperature, was installed in the studied part to collect data from 5 different depths (15cm, 30cm, 50cm, 80cm and 110cm) in the road section. It is normally used in detecting critical bearing capacity of road materials and to assess the frost and water effects on the road materials. Data obtained from the percostation in the test road was analyzed and compared with data obtained from two other stations in Finland. The purpose was to investigate the differences between the behaviors of Air Cooled Blast Furnace Slag, which was used to construct the test road, with the behavior of natural geological road materials, which were used in the two Finnish stations. The idea was to be able to explain the facts that may cause the difference between Air Cooled Blast Furnace Slag and other road construction materials. This study showed that Air Cooled Blast Furnace Slag due to its low water content will have lower Dielectricity values compared with the other road construction materials being used in the other test stations. And since Air Cooled Blast Furnace Slag contains a lot of Sulfur and Vanadium, that may leach down to lower layers or may help to produce H2SO4. The Electrical conductivity values in the layers beneath Air Cooled Blast Furnace Slag were found to be will be higher than those measured at the other test sections.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Air cooled blast furnace slag, Percmeter, Percostations, Road construction materials, Masugnsslagg, Hyttsten, Vägverket, SSAB.
Keyword [sv]
URN: urn:nbn:se:ltu:diva-50952ISRN: LTU-PB-EX--08/105--SELocal ID: 82bd9eac-fae0-4505-a9cc-bc095b9362f5OAI: diva2:1024315
Subject / course
Project work, other
Educational program
Student paper other
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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