In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office # 02.01/07
The Offices 02 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Welding of Reinforcing Steel Between Precast Concrete Units
Author(s): J. Neils Thompson, Hudson Matlock, and A. Anthony Toprac
Publication: Journal Proceedings
Appears on pages(s): 673-694
Abstract:It has been establish ed that damage to welded splices between unrestrained precast concrete units consisted primarily of cracking due’to differential thermal expansions. This study was intended to establish the effects of the controlling variables and to evaluate the damage. Specimens consisted of pairs of concrete blocks cast with a deformed reinforcing bar protecting from the end of each block. The bars were connected with 60 deg V-butt welds, performed at a reasonably rapid rate. Temperatures were measured with thermocouples along the steel bars and output voltages of the thermocouples were repeatedly scanned. Crack lengths were measured immediately after welding. Temperature distributions were found to be primaily functions of the bar protection (distance of weld from face of concrete). They were not affected much by bar size, thickness of cover, or welding procedure. Higher temperatures obtained with bare bars indicated a considerable amount of conduction of heat to the concrete in the regular units. Bond tests did not show that any significant decrease in strength was due to the cracks formed by welding. Apparently, with the specimens and procedures used, it made little difference whether the initial crack was formed during welding or later by initial loading in the pull-out test.
Click here to become an online Journal subscriber