Author : David Darwin
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (1 download)
Book Synopsis Bond Strength of Grouted Reinforcing Bars by : David Darwin
Download or read book Bond Strength of Grouted Reinforcing Bars written by David Darwin and published by . This book was released on 1993 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of hole preparation method, grout type, hole diameter, bar size, embedment length, cover, reinforcing bar deformation pattern, bar surface condition (epoxy coated or uncoated), orientation of the installed bar, and concrete strength on the bond strength of grouted reinforcing bars are described. Hole preparation methods, using a high-speed vacuum drill or a hand-held pneumatic hammer drill, and cleaning methods, using a fiber bottle brush with water, a fiber bottle brush without water, or compressed air only, are compared. Two capsule systems, two two-component grout systems, and two nonshrink grout systems are evaluated. Hole diameters range from 0.75 to 1.5 in. for No. 5 bars; 1.25 in. diameter holes are used for No. 8 bars. Embedment lengths range from 4 to 12 in. for No. 5 bars and from 6 to 15 in. for No. 8 bars. 1.5 and 3.0 in. covers are used. Two bar deformation patterns are evaluated. Bar installations include vertical, sloped, and horizontal. Concrete strengths range from 2700 to 5900 psi. Test results are used to develop rational design and construction requirements. A standard test to establish the Strength Class of a grout for anchoring reinforcing bars is proposed. In addition, a test method currently in use by one state department of transportation as a technique for proof-testing grouted reinforcement in the field is evaluated.