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At Titus if our customer requests us to perform joint filling, we will do this process first,
after the job is prepped for work. This process is done first because we wet grind -- the
water from the wet grinding operation make the joints to wet for the joint material to
adhere. We use a joint clean out saw, and a Polyurea machine to perform this work. In
this video we will discuss joint clean out, the tools used, and proper maintenance.
This is a control- joint clean out saw. It uses a single, 8" blade with a purpose to
cut and clean out the existing joints for joint material.
Control Joints are placed in fresh concrete to control stress cracks as the concrete cures.
They should be cut by the concrete placement contractor preferably on the first day at
25% of the thickness of the slab or the second day at 33% of the thickness of the slab. Our
job at Titus is to clean the control joints out and fill them with joint material leaving
a clean smooth finish for the customer.
The orange safety guard covers the blade and also contains the line to the vacuum. The
vacuum collects dust and other debris while cutting. The first cut, where the blade goes
into the concrete, will create the most dust and debris. Remember to always wear an N-100
On the backside is the adjustment bolt. This bolt will adjust the depth at which you are
cutting. Always turn off the power before adjusting the blade.
The arm that folds out is a marker. This marker will indicate where you are cutting and that
you are preforming cuts in a straight line. Before starting your cut, check to make sure
the pointer is adjusted properly.
To operate: Make sure the blade is lined up with the original joint you are cutting and
line up the pointer.
Always turn on the vacuum before you make your first cut. This first cut will create
the most dust and debris. Remember to wear a respirator while joint cutting on every
job.
While you are cutting, move in a steady and slow pace. You want to make sure you are cutting
to the correct depth to be able to fill the joints later on. Keep check that all the moving
parts and the vacuum are working correctly as you preform your cuts.
Never lift the joint cutter while the blade is still in rotation. Wait till you have turned
off the power and the blade has completely stopped.
After you have finished with the joint cutting, use the dust collection system to go over
all the joints you have created again. This will get out any debris left from the joint
cutting and will let the polyurea have a stronger adhesion.
Before you proceed to fill the joints, it is important to take a bar of ivory soap and
run it over and around all the edges of the joints. This will allow you to remove the
excess polyurea easier.
The next step is filling the joints with the polyuria machine. This will be described in
the next video.
Remember to always be clean and courteous when you on the job. If any questions or doubts
arise during a job, ALWAYS call and ask someone. We want to do the job right the first time!
We hope this helps you in your training. We strive to provide the highest quality our
customers want and deserve.
Thank you for watching.