Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determining the Cause of Distress in Pavements with Thin Bituminous Surfacings
Pavements built to light-traffic rural road standards and sealed with surface treatments or thin asphalts have generally given adequate performance for several years after construction. Distress in the form of cracking and/or surfacing disintegration may appear at a later stage and cause secondary distress in the form of more severe cracking, rutting and potholing, which may in turn lead to a loss of riding quality. In order to arrive at an effective rehabilitation strategy it is of paramount importance to identify the mechanisms causing the distress. The paper identifies these as shrinkage of the materials in the pavement layers, movement of the road foundation, and flexure of the bituminous surfacing. The causes of flexural cracking are subdivided into too thin a pavement causing excessive deflection, defects in the upper pavement layers causing low radii of curvature, and brittle binders causing the surfacing to have poor crack resistance. Aspects that can be considered to determine which of these influences are acting are discussed and summarized in tabular form. The reasons for disintegration of the surfacing are described in terms of aggregate and binder properties.
Determining the Cause of Distress in Pavements with Thin Bituminous Surfacings
Pavements built to light-traffic rural road standards and sealed with surface treatments or thin asphalts have generally given adequate performance for several years after construction. Distress in the form of cracking and/or surfacing disintegration may appear at a later stage and cause secondary distress in the form of more severe cracking, rutting and potholing, which may in turn lead to a loss of riding quality. In order to arrive at an effective rehabilitation strategy it is of paramount importance to identify the mechanisms causing the distress. The paper identifies these as shrinkage of the materials in the pavement layers, movement of the road foundation, and flexure of the bituminous surfacing. The causes of flexural cracking are subdivided into too thin a pavement causing excessive deflection, defects in the upper pavement layers causing low radii of curvature, and brittle binders causing the surfacing to have poor crack resistance. Aspects that can be considered to determine which of these influences are acting are discussed and summarized in tabular form. The reasons for disintegration of the surfacing are described in terms of aggregate and binder properties.
Determining the Cause of Distress in Pavements with Thin Bituminous Surfacings
M. C. Grant (Autor:in) / F. Netterberg (Autor:in)
1984
15 pages
Report
Keine Angabe
Englisch
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