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Characteristics of the rapid cure non-skid coating systems for the highly stressed area, exposed deck of the marine vessels were studied in order to establish an advanced coating system with higher cracking resistance. Some previous non-skid epoxy based coating systems for marine vessels suffered premature coating failure such as crack and delamination due to the lower fracture elongation of the coating accompanied with higher external stress.
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The purpose of this presentation is to introduce you to low-pressure, ambient temperature spraying of polyurea and to discuss the advantages of low-pressure spray equipment. Some of the inherent advantages are equipment cost, ease of use, less over-spray, and equipment mobility. This presentation will be divided into several key areas. We will examine features and benefits, general equipment specifications, capabilities, operation of the system, typical periodic maintenance requirements and examples of available options.
Ours is an age of stringent VOC regulations and one of the positive responses from coating formulators has been the advent of innovative high solids coatings that contain exempt solvents. While proper surface preparation for applying lining systems has always been crucial to long term coating success our field experience has shown that this is all the more the case with coatings formulated with one or more exempt solvents.
This paper describes the performance properties of coconut-based polyol resin used in polyurethane coating systems compared with commercially available polyurethane paints which use petroleum-based acrylic or polyester polyol resins, in terms of physical and corrosion properties under accelerated laboratory weather conditions. The studies also show the chemical resistance and protection properties from the discoloration effects of ultraviolet (UV) light on the painted metal test panel substrate specifically cold rolled steel.
Keeping track of the constantly evolving Architectural and Industrial Maintenance (AIM) regulations in the United States is a daunting task. Forecasting what these regulations might like in the future is even more difficult. However, both are important given concerns over compliance and green product formulations. The following is a historical perspective of why the VOC content of AIM products is regulated, overview of current regulations and a 5-year forecast of AIM regulations in the US.
The Farm Security and Rural Investment Act of 2002 (FSRIA) and the Food, Conservation and energy Act of 2008 (FCEA) established the BioPreferred Program which requires Federal agencies o give preference to biobased products when making purchases.
In early 2009 the City of Sunnyvale in Northern California put out to bid a repaint of three five‐million gallon water tank exteriors. The tanks existing coatings qualified as leadbased paint with average concentrations of 120,000ppm or 12% lead. The three tanks were successfully abrasive blasted to an SSPC SP‐10 and recoated with a zinc/acrylic system without erection of an SSPC Guide 6 Type 1A enshrouding containment. This paper tells the story of how this was done successfully using standard but not often seen work practices, even though the project was right next door to an elementary school and multi‐family residential developments and so had to perform to the strictest levels of environmental standards.
The construction of a major project such as a bridge can often provide significant challenges to say the least. These challenges are not always within the physical building or logistics of the bridge but often can be material related. One such challenge can be the curing of the materials on the project. To that end, Cianbro/Middlesex, a large industrial contractor, knew that they would need temporary climate control to meet the tight specifications for concrete curing during a construction project for the new Pearl Harbor Memorial Bridge in New Haven, Conn.
In 2000 the National Science Foundation estimated that the market for nanotechnology products will be over one trillion US dollars by 2015 and that the industry would employ over 200 million workers. These numbers have been subsequently quoted from funding applications to government policy documents, but at the halfway point many of the revolutionary and disruptive technologies predicted have failed to emerge. Indeed, seven years on from the inception of the National Nanotechnology Initiative, there appears to be little sign of a nanotechnology-based industry, although significant amounts of R&D are being undertaken by various industries.
The following describes some equipment and practices used for cleaning and painting the variety of substrates found on commercial stores: concrete masonry units (CMU), precast and tilt-up panels, steel awnings and canopies, Exterior Insulation Finish Systems (EIFS), and polycarbonate. Many contributing factors can create either a fairly straightforward and simple process or a very complex project.
Metal Components- Selection of coatings for use on joists, canopies, and structural steel, including problems with protecting steel that penetrates concrete or the ground.
While the coatings on commercial buildings may be less sophisticated than those used on industrial structures, the contractors face challenges that in many ways are equal to or greater than their industrial counterparts.