by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
Concrete In Australia : September 2011
Concrete in Australia Vol 37 No 3 27 detailed with some as long as several meters. 5. Arrangement of grout tubes: e arrangement of grout tubes must ensure that both the sleeve is fully grouted as well as the joint. Arrangements include: • a single tube at the back, with the expectation being that the grout outlet is through the joint opening. Clearly this method does not allow for blockages • two grout tubes at the back of the sleeve • a grout tube at the front and back of the sleeve • looped tubes in the back. ere is currently no standard, with opinion varied on the effectiveness of each arrangement. In order to understand and develop an effective detail for grouted sleeves, the authors tested several of the above factors. As the size of the tests is limited, not all factors could be investigated. e tests aimed to investigate: • resistance to sliding both laterally and longitudinally of a deformed bar with a post tensioned flat duct as a sleeve • the arrangement of grout and bleeder tubes that provides the most effective method of grouting the joint • the pullout resistance (perpendicular to the joint) of several sleeve types with and without several types of indents to augment load development between grout and concrete. Five test slabs were created to test the aims. 2.1 Test Slab 1 e aim of Test Slab 1 was to test the resistance to sliding prior to grouting, then to grout with multiple configurations of grout sleeves and cut to examine completeness of grouting. Prior to grouting, the slab would be jacked both longitudinally and perpendicularly to the direction of the joint to simulate movement of the concrete floors. Following grouting, the slab would be cut to allow the visual inspection of the grout in each sleeve. Each sleeve was cut twice, in order to inspect the grout at both ends of the sleeve. e slab was approximately 8 m long and 140 mm thick, poured in two pours. e first pour was a 300 mm wide central strip the length of the slab, with a "hammerhead" at one end to allow for jacking parallel to the joint. 25 x N20 dowel bars where cast through the 300 mm wide section effectively creating two movement joints of grouted sleeves. Following casting of the central portion, the faces were painted with a bitumen paint bond breaker and then sleeves installed over dowel bars. A 900 mm wide section of concrete was poured on either side of the central portion. is included rebates at either end to allow jacking perpendicular to the joint. N Figure 1. Layout of Test Slab 1. Figure 2. Grout sleeve arrangements for Test Slab 1.