A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A total of 76 pullout tests on Grade 60 rebars, ranging in size from Nos. 5 to 9, were grouted into unreinforced concrete test slabs and subjected to axial tensile loads. The objective of the study was to determine the embedment depths required to develop the tensile strength of these rebars in drilled and grouted holes. For these tests, a minimum acceptance criterion equal to 125 percent of the nominal yield strength of the bar was used. Embedment depths, for coated and uncoated bars grouted with either Type II cement or epoxy resins, were compared to current AASHTO specifications for developing tension reinforcement. Tests showed that embedment depths can be reduced 25 to 50 percent from values now specified when cement grout is used. With higher-cost of epoxy resins, the reductions range from 50 to 60 percent.
A total of 76 pullout tests on Grade 60 rebars, ranging in size from Nos. 5 to 9, were grouted into unreinforced concrete test slabs and subjected to axial tensile loads. The objective of the study was to determine the embedment depths required to develop the tensile strength of these rebars in drilled and grouted holes. For these tests, a minimum acceptance criterion equal to 125 percent of the nominal yield strength of the bar was used. Embedment depths, for coated and uncoated bars grouted with either Type II cement or epoxy resins, were compared to current AASHTO specifications for developing tension reinforcement. Tests showed that embedment depths can be reduced 25 to 50 percent from values now specified when cement grout is used. With higher-cost of epoxy resins, the reductions range from 50 to 60 percent.
Development Length of Grouted Rebars
F. P. Pezze (author)
1986
28 pages
Report
No indication
English
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