N°186. 1988. Contributions to Technology and Quality Control of Reinforcement: Quality System for Concrete Reinforcement - Synthesis Report

There follows three studies carried out by several Task Groups of the Permanent Commission VII "Reinforcement : Technology an d Quality Control". 

The first of these studies was written by the Task Group VI I / 2 "Quality Control ",

under the chairmanship of Dr. Russwurm , entitled : "Quality System for Concrete Reinforcement ". It was presented at the Quality Control Session during the CE B's 

Plenary Session at Rotterdam . 

The Working Group was confronted with a series of problems of a basically tech­nical nature and recognized that nearly every country had elaborated very de­

tailed specifications concerning the quality control of reinforcement . All these papers represent a different approach to quality control . 

In consequence the Working Group had to decide whet her to establish a new paper based on the smallest common denominator or to elaborate a paper including the present state of quality con trol know ledge . Due to the legal and juridic al aspects it was decided that a new paper should be prepared . 

The Working Group is convinced that the presentation of the main ideas concerning quality control of reinforcement is of greater importance than the collection of di fferent specifications of several countries . As such it tried to free itself of all juridical and economical restrictions . 

It was also decided that the paper should not be made up solely of statistics . The appropriate knowledge can be found in the literature . 

The second study was written by the Task Group VI I/ 1 "Technical Requirements for Reinforcement ", under the chairmanship of Prof. Delibes , entitled : "Bond of rein forcing bars with small diameters determined by the pull out test". 

In 1983, the Permanent Commission VII of the C. E. B. produced a revised version of RILEM 's standard method for the Pull Out Test of Reinforcing Bars . It intro­duced an important modification for specimens with size limited to 200 mm edge , and the application of the method limited to at least 10 mm bar diameter. Thus it will be possible to avoid the compaction diffic ulties of specimens that req ui re cubes of an edge equal to ten bar diam eters , when sm all ones were tested .