28/01/2014

www.gupta-verlag.de/polyurethanes

Fresh water swimming hole uses polyurea

The project was to construct a fresh water swimming hole for fish and humans. Durables Coating Systems is a contractor and installer of koi ponds and water features in Texas, USA. The company's years of experience in designing and building water features using polyurea made them the best choice for the project, said VersaFlex Inc.[image_0] This swimming hole used no chlorine or salt water. The plan was to have a habitat for the fish and an attractive, safe and functional area for the human visitors to sit and enjoy the pond and interact with the fish. "The filtration is more of what you would expect with a koi pond than a swimming pool. It's combination of dirt and concrete helps to maintain the shape of the walls and shelves,” said Eric Marsh. The total area of the swimming hole was just over 5,000 sq. ft. There is a large lower pond and an upper sitting area. Water is pulled from the pond and circulated through the sitting area with a pair of 5hp pumps. Durable Coating Systems used composite pre-sprayed polyurea panels made from VF-380 and geotextile fabric. They used the same VF-380 to seam all the panels together into one large, durable, monolithic and seamless pond liner. The colour used was mocha to blend with the surroundings.[image_1_right] VersaFlex VF380 is a 100 % solids elastomeric polyurea developed for applications such as geotextile lining membranes. VF 380 may also be applied to concrete and steel substrates. VF380 is a volatile-free, odorless system applied with 1:1 mix ratio with plural component spray equipment. "My equipment is old but still works for this kind of job,” said Eric Marsh. "I spray with a Glascraft MX and 200 feet of hose. I assembled my rig myself from a 1994 Chevy P30 step van, a pull-behind airman rotary screw compressor, and a Generac 15 kW gas generator. I have been using this rig for ten years now.” "I probably do 4 - 6 pond jobs a year. This year has been pretty active,” said Marsh. It was about a three week job. Normally, it would not take nearly that long but the summer heat was fierce; 107 degrees during the day. "We deemed it wiser to work part days than to suffer a heat injury. I also had an equipment failure that cost me a few days to fix,” said Marsh. The first part of the job took about four days with 4 - 5 people to cut and fit the pieces of liner into position. The remainder of the job was seaming the polyurea liner. Three people were involved in this part of the project; one watching the pumps, and two doing the coating work. The biggest challenge was the heat, according to Marsh. After that there were some logistic issues with having only 200 feet of hose relative to the application area and the location and reach of the equipment. "There is no way we were going to get the proportioner and drum sets down the the hill so it was all strategically located and had to be moved for the upper area. Material use was a little higher than I had calculated for, but I wanted to make sure that the seams were really strong,” concluded Eric. The project was for a private client who wants to remain anonymous. VersaFlush cleaning solvent now available for spray machine and hose flushing VersaFlex VersaFlush is a flushing solvent to be used to flush and remove the associated cleanup of uncured polyurea and polyaspartic polyurea from coating or sealant application equipment. VersaFlush replaces other solvents such as DOP, DINP, methylene chloride, acetone, MEK, and 1,1,1 trichloroethane. VersaFlush may be used for extended periods in application equipment and may reduce disposal costs.

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