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Click to download the Springs Preserve Project Review |
The Springs Preserve, located west of “The Strip” in Las Vegas, Nevada, is a 180 acre facility with approximately $300 million of new construction completed over the past seven years. Roads and trails constructed with SSPCO’s green product technologies, NaturalPAVE XL® Resin Pavement and EMC SQUARED® Stabilizer for base course and subgrade stabilization, highlight this green building project. The Springs Preserve is considered to be the birthplace of the City of Las Vegas. It was once the site of a lush oasis and meadow, the result of erupting underground springs. These springs are now dry, but are of great historical significance and contain evidence of human habitation dating back approximately 10,000 years. In addition to a building for a new Nevada State Museum that is just going into construction, the Springs Preserve has a visitor center focused on the fascinating cultural history of the Las Vegas Valley and the possibilities for its future. Facilities at the Springs Preserve also include a desert learning center focused on sustainable living, a large amphitheater for outdoor concerts and events, meeting facilities and event spaces, botanical gardens featuring Mojave desert vegetation, wetlands, picnic shelters and miles of NaturalPAVE XL Resin Pavement installations, which include a trail outside the fenced Springs Preserve area and all the interior access roads for vehicular and truck traffic.
The Springs Preserve buildings and site plan feature green building techniques intended to raise awareness of the newest breakthroughs in sustainable design. The buildings are designed to achieve Platinum Status from the U.S. Green Building Council (USGBC) Leadership in Energy and Environmental Design (LEED) program. The NaturalPAVE XL Resin Pavement installations meet all pavement engineering requirements and utilize aggregate materials closely matched to the coloration of the native desert soils and caliche rock at the Springs Preserve site.
The non-toxic pavement formulations complement water quality protection measures, and the high albedo surfaces qualify as cool pavements, being both solar reflective and more thermally resistant than concrete. In Las Vegas where summertime temperatures can reach very hot 125° Fahrenheit temperatures, solar reflective thermally resistant pavements are a responsible alternative to heat absorbent black asphalt, which contributes to Urban Heat Island problems, increased smog formation, greenhouse gas emission, global warming and climate change. Cool pavements around buildings reduce air-conditioning and energy demand. They also just make common sense when it comes to comfort and human health in our living and working environments.
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Construction of the East Access Road at the Springs Preserve with "The Strip" in background |
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Watch the KLAS NEWS Report on the NaturalPAVE XL Resin Pavement installation
at the Springs Preserve - Las Vegas, Nevada - Below |
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| Clarifications from the video above
Soil Stabilization Products Company Inc. manufactures, but does not install, NaturalPAVE XL Resin Pavment
NaturalPAVE XL Resin Pavements typically show higher strengths in materials testing than hot mix asphalt pavement materials. See "Pavement Materials Testing" below.
With temperatures as high as 116°F in Las Vegas as recently as July 5, 2007, and temperatures
over 120°F on record, caution needs to be exercised. At these temperatures even the most solar reflective pavements may be too hot to safely walk on barefoot or to sit on. The good news, when you are standing on a reflective pavement, is that it is still likely to be 30°F to 40°F cooler than black asphalt pavement during these high temperature conditions. |
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| The initial paving phase was completed in 2003 and included over two miles of interior roads paved with NaturalPAVE XL Resin Pavement. The paved roads serviced the delivery trucks and heavy equipment related to major earth moving operations and construction of the large buildings and a 20 million gallon water tank for the Las Vegas Valley Water District. Surfaced with a just two inches of NaturalPAVE XL Resin Pavement, these roads have impressively endured every sort of heavy truck and construction equipment operation without need for repairs since their construction six years ago. Additional NaturalPAVE XL Resin Pavement installations complete the second paving phase which includes the primary site access roads which route visitors into interior parking lots and delivery trucks to the loading dock areas of the seven new building facilities. |
The Marshall Stability test is a test method that historically has been used for design and control of hot mix asphalt mixtures. Typical Marshall Stability values for hot mix asphalt pavement materials, tested at 140° F temperatures, range from 2,000 to 6,000 pounds. A series of NaturalPAVE XL mixtures evaluated by Kleinfelder, Inc. provided results ranging from 7,500 to 18,000 pounds along with greater flexibilty than typical for hot mix asphalt. Converse Consultants provide quality control testing services for the Springs Preserve project. Twenty-two specimens cored from the Springs Preserve pavement installations measured an average stability of 9,414 pounds. The field performance test results again demonstrated very high stability and bonding strength as well as excellent flexibility measurements.
The NaturalPAVE XL Resin Pavement mix formulated for the Springs Preserve roads also provided excellent results when evaluated by the Thermal Stress Restrained Specimen Test (TSRST), a test procedure for evaluating the cold weather limitations of hot mix asphalt binder products. The test determines the point of failure where brittle cracking occurs. The Superpave Performance Grading (PG) system provides the temperature index. The PG system was developed for classification of the performance characteristics of hot mix asphalt pavement binders. The low temperature component of the PG system is relevant to performance evaluation of cold applied NaturalPAVE XL Resin Pavement. For reference, asphalt mixtures specified for southern Nevada road paving projects required to perform without failure in temperatures as cold as 22° Celsius. The typical low temperature performance requirement for asphalt mixtures specified for paving in New England states is 28° Celsius. Th e NaturalPAVE XL Resin Pavement specimens tested for the Springs Preserve road pavements averaged 40.7° Celsius, exceeding the 40° Celsius classification in the PG system for cold region paving applications.
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Utilizing resilient modulus testing services conducted by the University of Nevada Reno pavement materials testing laboratory, Kleinfelder Inc. evaluated the performance of the stabilized or “bound” base course used in construction of the Springs Preserve roads. A local aggregate material meeting Nevada DOT Type II specification requirements was treated with SSPCo’s EMC SQUARED® Stabilizer. With stabilization treatment the performance of the aggregate base course material was improved from 51,000 psi to 272,500 psi, a strength increase of over five times. According to the pavement materials engineer in charge of the evaluation program, test results indicated that this bound base course has a layer equivalency factor similar to that of hot mix asphalt.
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