Soff-Cut From Husqvarna

 

Husqvarna's system, Soff-Cut, is an ultra-early entry concrete cutting system that provides the solution to minimizing random cracking in new concrete. Random cracking is one of the most common and aggravating problems that a contractor can face when pouring new concrete. Random cracking can not only waste your time and money but can diminish your reputation as a concrete contractor. This technology allows concrete to be cut within the first two hours after finishing and before the final set. The wide range of Soff-Cut saws from Husqvarna gives you 8 different options depending on the size of the pour. There are 6 components to Soff-Cut that you should know before you start cutting.
Soff-Cut 4000 saw, 071024 0178 Husqvarna

 

1. Timing of the Cut

Soff-Cut in the Green Zone

If you are cutting concrete the same day as you poured the concrete, make sure you are cutting in the Green Zone™.  The Green Zone™ is the window of opportunity for Soff-Cut to be used to make relief cuts in the concrete to prevent random cracking. You are considered "in the Green Zone" about 1 to 2 hours after the concrete is poured and just before the final set. The concrete is still hydrating in this window of time, so to prevent underlying cracks in the concrete, control joints are made to relieve the stress. Make sure to test the concrete before trying to cut. If you press down on the concrete with your hand, foot, or the Soff-Cut saw and if it makes a mark, the concrete is not ready to be cut.

 

2. Dress your Soff-Cut Blade

Break-in your blade to expose the diamond before using it for your primary cuts. To break in a Soff-Cut blade, run your saw at 50% RPM for about 100 feet in old concrete.  When you rub your finger over the blade you should be able to feel the exposed diamonds on the segment. The blade will have an increase in total linear footage and will also help prevent raveling. We covered this topic in an episode of Coach's Corner. Check out this video that explains how to break in your Soff-Cut blade.

 

3. Blade Block & Skid Plate

The blade block and the anti-ravel skid plate are the reason Husqvarna's Soff-Cut system is unique. Skid plates attach to the two spring-loaded pistons at the bottom of the blade block. The blade block pistons keep a constant proper pressure on the concrete to make for a clean cut. Make sure your blade is aligned in the skid slot properly and not cutting into the skid plate causing damage. Inspect or change your skid plate after every new blade. This will help prevent chipping and spalling in your cut. Make sure there is no damage on the skid plate before cutting with a new diamond blade.

 

 

4. Soff-Cut Operation

Unlike other concrete cutting techniques, Soff-Cut is designed to cut the same day as the placing and finishing of the concrete. Once the finishing touches are made on the slab, you should begin to watch for the Green Zone™. Once you are in the Green Zone™ you should start to map out chalk lines 3.6m apart for control joints. Before making any cuts, check the life of the Soff-Cut blade and the skid plate. Also, check the engine and engine components to ensure you get the best performance from your Soff-Cut saw. Check out our best practices checklist to make sure your Soff-Cut saw is ready to cut.

Once the Soff-Cut saw has been through a maintenance check and you are in the Green Zone™ you can begin making your cuts.

Find your optimum forward travel speed, if the saw is pulling to the left, you are moving too slow and if the saw is pulling to the right, you are moving too fast. Inspect your Soff-Cut blade before and while you cut for any signs of overheating or glazing over. An overheated blade or glazed over segments show signs of inadequate amount of coolant or sawing too quickly.

 

5. Protect Your Control Joints

Joint Protectors

Control joints are made to give relief to the concrete to help prevent random cracking. While in the Green Zone™ the concrete is still very fragile and putting pressure on the concrete may cause the sides to collapse. Do not step or roll the Soff-Cut saw over the control joints. While sweeping up debris from the cuts, it's important to sweep in the same line as the cut NOT ACROSS THE CUT.

When creating the center-line cut use joint protectors at the intersection with a control joint, and at the point where the Soff-Cut saw's wheel will drive over the joint. Joint protectors help maintain the concrete and keep the intersection intact. Once the intersection cut is made and the concrete has completed its final set, joint protectors can be removed.

 

6. Clean up and Transportation

When finished cutting, make sure you clean your blade block so it is ready for the next day. Remove any debris to keep the piston working properly. Take the Soff-Cut blade, the blade block, and the skid plate off the machine when transporting the saw. Smaller Soff-Cut saws, like the Soff-Cut 150, are easily compacted and folded to fit inside the back of a truck. 

 

 

More Soff-Cut Info

Check out more information on Soff-Cut equipment from Esch.
Need help selecting the right equipment? Contact us for help selecting the proper equipment.

 

Soff-Cut BladesSoff-Cut Blades

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