Original scientific paper
Evaluation of the Effect of Lime-Stabilized Subgrade on the Performance of an Experimental Road Pavement
József Péterfalvi
; University of West Hungary Faculty of Forestry Department of Forest Opening Up Institute of Geomatics and Civil Engineering Bajcsy-Zsilinszky u. 4. Sopron, 9400 HUNGARY
Péter Primusz
; University of West Hungary Faculty of Forestry Department of Forest Opening Up Institute of Geomatics and Civil Engineering Bajcsy-Zsilinszky u. 4. Sopron, 9400 HUNGARY
Gergely Markó
; University of West Hungary Faculty of Forestry Department of Forest Opening Up Institute of Geomatics and Civil Engineering Bajcsy-Zsilinszky u. 4. Sopron, 9400 HUNGARY
Balázs Kisfaludi
; University of West Hungary Faculty of Forestry Department of Forest Opening Up Institute of Geomatics and Civil Engineering Bajcsy-Zsilinszky u. 4. Sopron, 9400 HUNGARY
Miklós Kosztka
; University of West Hungary Faculty of Forestry Department of Forest Opening Up Institute of Geomatics and Civil Engineering Bajcsy-Zsilinszky u. 4. Sopron, 9400 HUNGARY
Abstract
Forest roads should be constructed to provide economic wood transport routes while causing minimal environmental impact. Therefore, the extended use of local materials (soil, stone) is essential. As cohesive soils cannot be drained by gravity and saturated cohesive soils have low bearing capacity, their use as a building material raises problems. This issue can be solved by lime stabilizing the soil. An experimental road was constructed to evaluate the effect of lime stabilized cohesive soil on the pavements built on top of it. Nine pavement versions were built on three different thickness (15, 25 and 35 cm) of lime stabilized soil. A traditional pavement without lime stabilization was also built for comparison. The bearing capacity of the stabilized layers and the finished pavements were calculated. The long term performance of the pavements was tested by measuring the effect of artificial traffic on their bearing capacity. Results showed that the bearing capacity modulus of the lime stabilization was around 500 MPa. 25–35 cm of lime stabilization under the pavements was necessary for good long term performance. 35 cm thickness of the stabilized local soil was enough to withstand the applied traffic without serious damage. Therefore, lime treated cohesive soil can be recommended as a subgrade layer in forestry conditions.
Keywords
forest opening up; lime-stabilization; road test; bearing capacity
Hrčak ID:
151825
URI
Publication date:
1.10.2015.
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