Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The report presents the results of a Statewide investigation of the extent, seriousness and causes of rigid pavement blowups, together with possible preventative and remedial measures. The investigation showed that all blowups occurred at the joints of the pavements containing gravel aggregate. In the 48 and 54 miles of comparative pavement of the same design and age group, 23 blowups occurred in the gravel aggregate mileage and none in the crushed stone aggregate mileage. Various tests were performed on the coarse aggregate from the 15 different sources in an attempt to correlate aggregate characteristics with blowups. The only valid correlation that could be developed was aggregate porosity versus blowups. The investigator concluded that the porosity of the coarse aggregate was the primary factor contributing to the blowups but recognized that many other influencing factors existed, including excessive moisture in the subbase and the infiltration of incompressible material into the joints. The recommendation was made that consideration be given to limiting the porosity of the coarse aggregate used in concrete pavements to 3% or require the contractor to furnish a record that the coarse aggregate was used elsewhere and no blowups had occurred in six years from the date of construction.
The report presents the results of a Statewide investigation of the extent, seriousness and causes of rigid pavement blowups, together with possible preventative and remedial measures. The investigation showed that all blowups occurred at the joints of the pavements containing gravel aggregate. In the 48 and 54 miles of comparative pavement of the same design and age group, 23 blowups occurred in the gravel aggregate mileage and none in the crushed stone aggregate mileage. Various tests were performed on the coarse aggregate from the 15 different sources in an attempt to correlate aggregate characteristics with blowups. The only valid correlation that could be developed was aggregate porosity versus blowups. The investigator concluded that the porosity of the coarse aggregate was the primary factor contributing to the blowups but recognized that many other influencing factors existed, including excessive moisture in the subbase and the infiltration of incompressible material into the joints. The recommendation was made that consideration be given to limiting the porosity of the coarse aggregate used in concrete pavements to 3% or require the contractor to furnish a record that the coarse aggregate was used elsewhere and no blowups had occurred in six years from the date of construction.
The Study of Pavement Blowups
M. J. Hensley (Autor:in)
1966
50 pages
Report
Keine Angabe
Englisch
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