Title: Bond Strength of Reinforcement Affected by Concrete Sedimentation

Author(s): Geoffrey B. Welch and Bruce J. F. Patten

Publication: Journal Proceedings

Volume: 62

Issue: 2

Appears on pages(s): 251-264

Keywords: bleeding, bond strength, concrete, deformed bar, plain bar, reinfrocement, reinforcing bar, research, sedimentation, settlement.

DOI: 10.14359/7690

Date: 2/1/1965

Abstract:
Experimental investigations to examine the effect of concrete sedimentation characteristics on pull-out bond strengths are reported. Concretes of the same compressive strength but varying settlement and bleeding were used with plain round, square, twisted, and deformed bars. The general trend of the results indicated that increased concrete settlement in all cases led to reduced bond of rigidly positioned, horizontal bars, even with small depths of plastic concrete beneath the bars.