Award Bid - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer, LLC

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dissolve the Perkadox 16, use styrene at a minimum of 1.0-2.0 times the weight of Perkadox 16. • For the catalyzation, add the chemicals separately in the following sequential order and mix each chemical 1-2 minutes before adding the next ingredient: • Perkadox 16/styrene monomer solution or other primary catalyst • Trigonox KSM or other secondary catalyst • 1 cc of dye per pound of Perkadox 16 After the Perkadox 16/styrene monomer/Trigonox KSM solution has been mixed thoroughly, filter the solution with an appropriate screen. The resin & catalyst solution should be mixed for approximately 7-10 minutes. After mixing, obtain a sample for gel time testing and once again measure and record the temperature of the resin and the time. The resin temperature should still be cool (i.e. 55-60ºF), but will probably be slightly increased compared to the original measurement. Once the temperature is verified to be acceptable, pump the resin into the tube. If the resin temperature is greater than 70ºF, take special precautions to ice the tube as it is loaded into the truck. Note: When mixing in 55-gallon drums, the number of mixes required for any given wet out is often increased and this can lead to errors or mistakes in resin catalyzation. In the event many people get involved with the wet out, delays or equipment failures may distract the wet out supervisor and result in mixing errors. Therefore, it is strongly recommended that the wet out supervisor develop a system for marking the drums as each chemical is added in order to avoid double chemical additions and/or leaving a chemical out. For example, when the Cobalt Naphthenate is added, spray paint a "C" on the drum, when the Trigonox KSM is added, spray paint a "T" on the drum, and a "P" for the Perkadox 16. RESIN SAMPLING & GEL TIME TESTING Prior to pumping the resin into the tube, obtain a sample from each drum or every 500 pounds of inline mixer for gel time testing. Gel time testing is strongly recommended in order to verify that the resin has been properly catalyzed and mixed. In addition, performing gel time tests will provide a quality record that may be required by the owner and/or provide the necessary information for solving unanticipated problems that may be encountered during the wet out or in the field. Pre-heat the water bath between 160-175ºF. For consistent comparison and quality control, heat the water bath to the same temperature every time. Before filling the 50 ml test tubes with resin, position the thermocouple wire within 1 inch of the bottom of the tube. Fill the test tubes with 3.5 inches of resin and immerse into the water bath to a depth of 2.5 inches. Record the rise in temperature and the exothermic event with a chart recorder for your permanent records. After the resin has exothermed and looks consistent with previous gel time test data it can be pumped into the tube for the wet out procedure. After the cure is complete, leave the test tube in the water bath for 10-15 extra minutes to verify that the resin cure rises up the test tube in the 1-inch portion left above the level of water. This type of curing can sometimes simulate the type of cure one might expect in lateral lines or manholes in the presence of water.