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Ezine ready page
Ezine ready page
Posted on October 31, 2009 by sanaka | Posted under Landscaping Gardening
X-Calibur Construction chemistry Inc
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The elevator pit needed to be deepened to satisfy building codes. The elevator shaft was also prone to frequent flooding due to the high water table. Geotechnical investigation identified Perchloroethlene (Perc) in the ground. Perc is extremely volatile and classified by the EPA as a Class1 carcinogen. Perc is a strong solvent and very aggressive to most waterproofing materials. The problem was finding a waterproofing system that would resist Perc. Under the direction of Environmental Consultant GZA, contaminated water was collected and used to test Rawmat HDB membrane to prove that the product would be resistant to the Perc contaminated into system. Reflecting Pond, 3M World HQ Originally built in the late 1960s, this Reflecting Pond was lined with asphalt and contained 3ft deep water. Due to the harsh Minnesota winters the pond only held water for 6 months of the year (May-Sept). Over time, the asphalt substrate had cracked and it was costing the owners $30,000 to $40,000 per year to keep the pond watertight. The need was for a lining system that could waterproof the aged and cracked substrate and also withstand the 6 months wet and 6 months dry UV exposure for many years with out cracking. Renovation of Hotel Roof The existing roofing system was a 16 year old 8000 ft2 EPDM fully adhered membrane roof. Constant maintenance and repairs had been completed over the life span of this system. Numerous leaks into the structure had frustrated the management and prime rental rooms were unable to earn revenue because of water damages, falling drywall and the odd odor of mildew. It was determined that bad flashing details, splitting seams and screws from the mechanical attachment of the 1" ISO insulation were backing out and popping through the EPDM membrane X-Shield FS450 - Big Springs Fish Hatchery The existing concrete substrate was painted with a lead based paint that was flaking and delaminating. There were also traces of PCB contamination in the concrete. The fish hatchery was located up stream of a heavily fished spring which presented the danger of contamination to both fish and wild life in addition to local residents. There were also numerous cracks in the concrete. A total of 52,000 ft2 of concrete need to be coated. After the lead paint was safely removed the Engineer required a coating that would form a dense barrier to the contaminated concrete and also have the ability to accommodate the cracked concrete. A key factor was also that the coating had to be no toxic to fish and wildlife. Sheikh Khalifa Stadium Due to the complexity of the cladding design many of the gutters were unsuitable for the specified Hypalon ® sheet membrane to be used as it requires to be cut, welded and glued. In addition the gutters had many penetrations. The cladding sub contractor required a fast cure liquid membrane as many other trades were on the roof and we jumping in and out of the gutter. This traffic would damage a conventional liquid membrane as it would need more than 24 hours to cure. Airport Hanger Gutter Waterproofing A concealed aluminum gutter system was used on these structures to channel away rain water. The joints were simple overlaps riveted together. Minor leakage through the joint was acceptable as rain in Dubai is infrequent and the gutters would drain the water away quickly. The problem was with dealing with the early morning condensation which created an unforeseen volume of water. The gutter design was not able drain away this amount of water quickly resulting in almost daily leakage of water through the joints. About The Author: Sealing of Barbecue area at Wild Wadi Water Park During the 2007 renovation of the park, a new barbecue area was installed. |
Tags: CONSTRUCTION CHEMICALS
