TRIS Online Record

Printable View

Title	IMPACT-ECHO STUDIES OF INTERFACIAL BOND QUALITY IN CONCRETE: PART II--EFFECTS OF BOND TENSILE STRENGTH
Accession No	00726915
Authors	Lin, J-M; Sansalone, M; Poston, R
Journal Title	ACI Materials Journal Vol. 93 No. 4
Corp. Authors / Publisher	American Concrete Institute
Publication Date	19960700
Description	p. 318-326; Figures(9); References(26); Tables(4)
Languages	English
Abstract	This paper and a companion one summarize the findings of a feasibility study in which the impact-echo method was used to determine interfacial bond quality in layered concrete structures, such as bridge decks with overlays or at the interface between repair concrete and existing concrete. In this context, bond quality involves both the tensile strength and the amount of unbonded fraction of area at an interface. This paper focuses on how bond tensile strength impacts the results of impact-echo method. Results obtained from numerical, experimental, and field studies are presented. The numerical studies were used to quantify the stresses in the waves generated by elastic impact to determine whether these waves could be used as a measure of bond tensile strength. Experimental and field studies were conducted to examine impact-echo results obtained from a layered concrete plate with a variety of interface conditions varying from strongly-bonded to delaminated as well as conditions produced by removal of concrete by jackhammering and hydrodemolition. The pulloff test method was used to derive bond strengths in both the experimental and field studies. Findings revealed that the stresses generated by short-duration, elastic impacts are much too small to serve as a measure of bond tensile strength.
TRT Terms	Adhesion ; Bridge decks ; Concrete tests ; Experiments ; Field studies ; Impact tests ; Interfaces ; Nondestructive tests ; Numerical analysis ; Stresses ; Tensile strength
Other Terms	Bond (Adhesion); Concrete testing
Subject Areas	H32 CEMENT AND CONCRETE; I32 Concrete
Availability	American Concrete Institute Find a library where document is available Order Document: http://worldcat.org/oclc/13846872
TRIS Files	HRIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.