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What we do: concrete accessories
Key Joints and Krack Mates:
Included in our wide selection of concrete accessories are our pre-formed control joint products, being the Connolly keyjoint and Krack Mate.
Connolly Keyjoint :
 SAVE BIG MONEY USING THE CONNOLLY KEY JOINT
Traditional chequerboarding requires concreting team, concrete pump and/or crane for at least 2 days; stripping-out costs; two lots of overs wasted and needs 3 consecutive fine days - how lucky do you feel?
 Continuous pours eliminate the high cost of chequerboarding
Using Connolly Key Joint, the whole slab is poured in one day and therefore requires concreting team, concrete pump and/or crane for only the one day;
eliminates stripping - out costs and leaves only one lot of overs wasted.
 Connolly Key Joint is a galvanised steel tongue-and groove formwork that becomes part of the slab forming the control joint.
Connolly Key Joint's unique Fixing System makes installation simple and at least twice as fast as conventional formwork methods. You'll also achieve a neater, more uniform line, and at a fraction of the cost.
The secret to all this lies in the unique Wedge and Dowel (PAT PEND) Fixing System, designed and perfected on the Job by Paul Connolly a builder from NSW Australia.
Connolly Key Joint is supplied with one wedge and dowel per 750 mm for normal use.
Connolly Key Joint can be used to maintain rainage falls, eliminating problems with ponding.
On large slabs (houses, factories, etc.) Connolly Key Joint controls cracking
CONTRACTION JOINTS REPLACE THE NEED FOR EXPANSION MATERIAL IN CONTINUOUS POURS
How does it work?
As concrete dries it shrinks. Under most circumstances this initial
shrinkage is greater than the concrete will expand, even on the hottest days. In continuous pours, shrinkage cracking can be controlled by using Connolly Key Joint. The small voids adjacent to the Connolly Key Joint can replace traditional expansion material joints. If the distance between the Joints is increased, the size of the shrinkage void in the contraction Joint increases. If this becomes too great, sand and grit can enter the joint, preventing subsequent thermal expansion and causing the joint to fail, It is therefore necessary to keep Joints relatively close together (less than 6 metres between joints) or incorporate some seal to prevent dirt and grit entering the joint. Connolly Key Joint produces a range of capping strips for this purpose.
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