Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation of Unbonded PCC Overlays
An investigation of unbonded PCC overlays placed over old PCC pavements is reported. Test sections were constructed to compare the effect of various materials as bond breakers. Performance was measured by the ability of the overlay system to prevent reflective cracking. It was concluded from these tests that an asphalt, such as MC-250, with a light sand cover to prevent pickup, reduces bond sufficiently to prevent reflective cracking, even when joint spacing is different from that of the base pavement. Wax base curing compound, specified as a bond breaker on one project, did not perform as well as anticipated. At a considerably higher cost, asphalt concrete also performs very well and is particularly worth consideration when leveling of the base pavement is necessary. (Author)
Investigation of Unbonded PCC Overlays
An investigation of unbonded PCC overlays placed over old PCC pavements is reported. Test sections were constructed to compare the effect of various materials as bond breakers. Performance was measured by the ability of the overlay system to prevent reflective cracking. It was concluded from these tests that an asphalt, such as MC-250, with a light sand cover to prevent pickup, reduces bond sufficiently to prevent reflective cracking, even when joint spacing is different from that of the base pavement. Wax base curing compound, specified as a bond breaker on one project, did not perform as well as anticipated. At a considerably higher cost, asphalt concrete also performs very well and is particularly worth consideration when leveling of the base pavement is necessary. (Author)
Investigation of Unbonded PCC Overlays
D. L. Spellman (Autor:in) / J. H. Woodstrom (Autor:in) / B. F. Neal (Autor:in)
1971
21 pages
Report
Keine Angabe
Englisch
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