Crack inducers work most effectively in creating early cracking. Unfortunately they can often create the crack prior to sawcutting and then you will have sawn joints with cracks meandering along and across the sawn joint. Often the saw cutter will cut the slab even though it has clearly cracked. The Concrete Crack Inducer is an easy & cost-effective way to put the crack where YOU want it. Removing the need to cut the concrete removes the risks of cutting cables and pipes. The 47mm Crack Inducers can be connected with the Jointer to create a grid system as small as 1200mm sq. Also available in 1150mm lengths. Branz Corporation, 'Concrete Slabs and Conrol Joints', Build, Aug/Sept 2005, Branz, Moonshine Road, Judgeford, Porirua City 5381, New Zealand Post: Private Bag 50 908, Porirua 5240, New Zealand Phone: +64 4 237 1170 Fax: +64 4 237 1171 Email: branz@branz.co.nz Publication sales: publicationsales@branz.co.nz, Tel: Professionals helpline - 0800 80 80 85 - is available free to those.
Floor Masters have been fixing concrete surfaces since 2000, and concrete crack repair is a big part of that. Concrete guys have a saying
There are 2 guarantees with a concrete slab, It will go hard andIt will crack. and the other day I heard another line to the saying – if it doesn’t we will replace it.
It’s easy to see that concrete is a fundamental building block in the construction of almost every building and in many landscapes. Concrete is cost effective and durable. It is also worth noting that a crack in concrete does not need to be a big concern, and we can repair cracks in your concrete.
Concrete cracks for many reasons –
Shrinkage is the common – many people do not know that concrete shrinks as it cures, as the water evaporates the particles consolidate. The larger the slab, the greater the shrinkage. This can be evident in two ways – lots of “micro cracking” (very fine cracks) or larger cracks.
Settling cracks – you have just put a heavy slab on the ground and sometimes the ground will compress more in some areas than others. This can often result in the crack being higher on one side than the other, or in extreme cases, changing angles (i.e it sinks at one end).
Substrate movement – in areas with lots of clay in the ground, clay will swell with moisture and shrink when it dries out. These cracks often open and close with different weather cycles.
Subsidence – Where the ground moves or sinks and puts stress on the concrete. Slabs can sink or pull apart.
Understanding concrete crack repair
It is important to understand that a crack in concrete often goes right through the slab, and it can branch out as it goes down. The best concrete crack repair resin is thin, and able to follow the crack in the concrete deeper and make a stronger repair. We use Fast Fix, a hybrid polyurea concrete crack repair resin we import from the USA. Fast Fix is great for crack repair because it is water thin and able to really get down into the crack and “weld” it back together. It is also to follow the branches of the crack and repair the surrounding fractures.
Another bonus of the Fast Fix concrete crack repair resin, is that it cure quickly and we can allow traffic across the floor, or continue with additional floor repairs of coatings in as little as 15 minutes.
At Lesa Systems Ltd, we want to help engineers, designers, developers and contractors to mitigate against any risk in their concrete construction project.
Crucial in achieving this is aligning your business with a single source partner. One that is trusted, reputable, and has extensive experience with concrete and the construction process across all types of projects, as well as having extensive knowledge of the inevitable issues encountered with poorly designed and constructed slabs on grade.
That's why in 2017, Canzac Group acquired Lesa Systems Ltd, to not only broaden an already extensive product offering but more importantly, to give you one point of contact.
Lesa Systems Ltd and Canzac Limited have both been in business for 30 years, offering 60 years of combined industry experience. We are the 'go to' company for engineers and contractors as we know what works and we know what doesn't.
Our concrete fibre slabs have been around longer than our competitors have been in business.
Some of the many benefits of having Lesa Systems/Canzac as a single source supplier:
- Design assistance: Involvement in the design and documentation from the very beginning of the project - before the working drawings are commenced (EDI).
- Experience: Benefit from a highly experienced team with extensive and specialised skills in all aspects of design, construction and performance of slabs on grade across all types of projects.
- Timely advice: Access to the right information at the right time.
- Specialised knowledge:Utilise the team's industry experience in load transfer systems (dowels), appropriate to the project and other aspects of construction including vapour barriers, control joint locations, edge protection, joint filling, curing, densification etc.
- High-level technical support: Gain access to expert consultants, when required, for geotechnical considerations, design loads, minimum slab thickness etc.
- Certification: Provision of producer statements for the slabs (PS1, PS2 and PS4).
- Responsibility: Accountability for all aspects of the slab performance.
- Commitment: Work with a company/supplier that understands what clients want and what they expect with their slab on grade floor (not just a product supplier).
Harder Than Concrete - As told to Hugh de Lacy
Harder Than Concrete tells of the struggles founders Lance and Carolyn Canute (CC) encounter in their pursuit to establish and expand Canzac.
It recounts the unconventional path of a young, budding kiwi entrepreneur, who leaves school at 15 and his home at 18 to travel abroad. Along the way, an unlikely friendship ignites a lifelong passion within the construction industry and just as everything seems to be going to plan, life takes an unexpected turn.
Concrete Slab Crack Inducer Nzd
Returning to New Zealand in a bleak job market, he tries his hand as a fast-food business owner, only to find that even the world of fast food has its critics. With little interest in improving his cooking, he decides to shut the business, but not before realising that he had won over one customer, a shy, unassuming girl who eventually shows what she’s made of when she asks him out. It’s not long before her loyalty and quiet determination is put to the test as they set up house, start some questionable sideline businesses and spend their entire savings on some Super-Tie formwork systems. Supported only by her medical practice wages they anxiously await for the orders to roll in. From product lines, upsizing and company takeovers, would these risks pay off and just how long would it take this concrete rebel with a cause?
An insightful story, full of witty, down-to-earth anecdotes that have been cleverly crafted and interwoven into the political and historical landscape of the time, by award-winning Christchurch journalist Hugh de Lacy.
Concrete Slab Crack Sealer
Soft Copy: $17.50 (inc P&P) - Hard Copy: $22.50 (inc P&P)
Email: info@lesasystems.co.nz