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<title>Home > Hexcrete Tower Project </title>
<meta name="keywords" content="Hexcrete-tower-project, Wind-energy, Sri Sritharan">
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<a href="partnership.htm"><h2 style = "text-align:center; margin-top:0px; color:White;">The first 2018 Hexcrete - Joint Industry Partnership meeting will be held on March 19 in Ames, Iowa</h2></a>
<!--<h2 style = "text-align:center; margin-top:0px;">Sign up for Hexcrete Commercialization Workshop</h2>
<p><strong>DATE: </strong> June 22, 2016 (6.30 pm to 8 pm) : Opening Reception </br>
<span style="padding-left:51px;">June 23, 2016 (8.00 am to 4 pm) : Workshop<a href="http://sri.cce.iastate.edu/hexcrete/Hexcrete Commercialization Workshop - June 23 2016 - Annoucement.pdf" target="_blank"> Click for more information</a></span> </p>
<p><strong>LOCATION: </strong>The Crowne Plaza Denver Airport Convention Center, Denver, CO 80239. <!--button type="button" onclick="alert('Details will be added later')">Click here for more details</button--> <!--</p>
<p><strong>HOTEL RESERVATION:</strong> A block of rooms at Crowne Plaza is reserved for the workshop at a rate of $124 plus tax per night. The special rate will be available until June 1, 2016 or until full.
Reservations can be made by calling 1.866.378.1583 and referring to Hexcrete, block code ( HEX ) or by <a href="http://www.crowneplaza.com/redirect?path=hd&brandCode=cp&localeCode=en®ionCode=1&hotelCode=DENAU&_PMID=99801505&GPC=HEX" target="_blank"> clicking here</a>.</p>
<p><strong>REGISTRATION:</strong>
Early bird ($100, before May 31, 2016)<a href="https://goo.gl/SUjt2L" target="_blank"> Click here to Register</a></br>
<span style="padding-left:132px;">Regular ($150, after May 31, 2016)</span></p>
<p><strong>WHO SHOULD PARTICIPATE:</strong>
Wind farm owners, developers and contractors; Turbine manufacturers; Tower designers and manufacturers; Precast Fabricators; Erectors; Wind farm foundation designers; Wind farm project financiers; High strength/ultra-high strength concrete professionals; Prestressing companies; Certification specialists; wind farm forecasting experts; and tower health monitoring experts. </p>-->
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<div style="text-align:justify;font-size:14px;width: 916px !important;"><i>This project facilitates widespread deployment of the Hexcrete technology for tall wind turbine towers with a hub height of at least 120 m (394 ft). Using modularized high strength concrete and ultra-high strength concrete (UHPC) components, the new technology eliminates the transportation and logistics constraints associated with construction of taller wind turbine towers. With funding from the Department of Energy and Iowa Energy Center, the Hexcrete tower technology was advanced and a commercialization plan was developed. To realize the prototyping of Hexcrete and/or Hexcrete-Steel hybrid towers, a Joint-Industry Partnership (JIP) has been formed. Different options are being explored to build Hexcrete prototypes with a hub height above 100m.</i><br> </div>
<a href="technology.htm" title="Learn more about this project" class="btnlnk"><img src="images/rm.png" width="140" height="30" alt="Learn more about this project" id="btn-more" class="btnlnk" /></a>
<hr/>
<!--div align="left-align"><table style="padding-top: 7px;"><tr><td><a href="http://sri.cce.iastate.edu/hexcrete/form.php" title="Sign up to learn more about this project" class="btnlnk"><img src="images/red.jpg" width="131" height="24" alt="Sign up to learn more about this project" id="btn-more" class="btnlnk"/></a></td><td><b><i style= "color: #F50303; font-size: 15px">To attend a Hexcrete commercialization workshop during the week of June 20th (2016) in Denver, CO.</i></b></td></tr></table></div-->
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<!--<p><img src="/images/about-neesit.jpg" class="block" width="400" height="200" border="0" alt="NEESit, located at the University of California-San Diego" /></p>
-->
<!--h2><i> Scope: </i></h2-->
<!--p><div style="text-align:justify !important;text-justify:inter-word !important;">The overall scope of this project is to facilitate widespread deployment of life cycle cost-competitive tall towers with a hub height of at least 120m (394 ft) which eliminates the transportation and logistics constraints, thereby reducing the levelized cost of energy (LCOE). The Hexcrete concept will form the basis for this development.</div></p-->
<h2><i>Background: </i></h2>
<p><div style="text-align:justify !important;text-justify:inter-word !important;">The U.S. installed wind energy capacity has grown by 31% over the past five years to about 60 GW. Looking back at the technology advancements of this industry,it is clear that all three major components of the wind energy system (turbine, blades and tower) have increased in size or capacity, which in turn has helped to reduce the cost of wind energy over the years. While bigger turbines and longer blades are being continuously introduced, the increase in tower height, which is a prerequisite for increased turbine and bladesize, has only seen incremental technology advancements. The impetus for this incremental change was the base dimension of the 80 m (262 ft) tubular steel tower reaching the transportation limit, significantly increasing the cost of taller tubular towers. The frequent alternatives that the industry has attempted include the hybrid concept with a concrete base and concrete shell towers. Neither technology completely overcomes the transportation and logistical constraints. The transportation limit hindering the increase in tower height clearly shows that a new technology is needed since such a limitation has not prevented other civil infrastructures to continue to reach newer heights (e.g., buildings) and newer lengths (e.g., bridges).</div></p>
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<h2><i>Wind Energy Potential </i></h2>
<ul><!-- style="text-decoration:none;list-style:none;"-->
<li><i><a href="http://energy.gov/eere/wind/wind-vision" target="_blank">Wind Vision Report</a></i></li>
<li><i><a href="http://apps2.eere.energy.gov/wind/windexchange/windmaps/resource_potential.asp" target="_blank">Wind Potential Capacity</a></i></li>
<li><i><a href="http://energy.gov/maps/map-projected-growth-wind-industry-now-until-2050" target="_blank">Projected Growth</a></i></li>
</ul>
<h2><i>Facts and Benefits </i></h2>
<ul><!-- style="text-decoration:none;list-style:none;"-->
<li><i><a href="http://www.awea.org/Resources/Content.aspx?ItemNumber=5059" target="_blank">Wind Energy Facts at a Glance</a></i></li>
<li><i><a href="http://www.windenergyfoundation.org/interesting-wind-energy-facts" target="_blank">Other Interesting Facts</a></i></li>
<li><i><a href="http://apps2.eere.energy.gov/wind/windexchange/pdfs/wind-energy-benefits.pdf" target="_blank">Wind Energy Benefits</a></i></li>
<li><i><a href ="http://energy.gov/articles/top-10-things-you-didnt-know-about-wind-power" target="_blank">Top 10 Things You Didn't Know</a></i></li>
</ul>
<!--h2><i>Current Test: </i></h2>
<ul style="text-decoration:none;list-style:none;">
<li><i><a href="http://www.public.iastate.edu/~gsteja/Caltrans-project/experiments.htm#ct3">Connection Test 3</a></i></li>
</ul-->
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<h2><i>Links to Other Projects</i></h2>
<br />
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<ul>
<li class="bullet"><a href="http://sri.cce.iastate.edu/abc-seismic/"target="_blank">
Accelerated Bridge Construction (ABC) for Seismic Regions</a></li>
<li class="bullet"><a href="http://sri.cce.iastate.edu/NEES-Rocking-Wall/" target="_blank">
NEESR-CR: Rocking Wall Project for Seismic Resilient Structures</a></li>
<li class="bullet"><a href="http://sri.cce.iastate.edu/camber/"target="_blank">
Improving Accuracy of the Camber Predictions for Precast Prestressed Concrete Bridge Girders</a></li>
<li class="bullet"><a href="http://sri.cce.iastate.edu/uhpc/"target="_blank">
Research on UHPC materials and its use in Structural Design</a></li>
<li class="bullet"><a href="http://sri.cce.iastate.edu/dshaft/"target="_blank">Development of LRFD procedures for bridge foundations consisted of drilled shafts</a></li>
<li class="bullet"><a href="http://srg.cce.iastate.edu/lrfd/"target="_blank">Development of LRFD procedures for bridge foundations consisted of driven piles in Iowa</a></li>
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