{"id":6236,"date":"2016-03-15T08:48:51","date_gmt":"2016-03-15T08:48:51","guid":{"rendered":"http:\/\/www.kurzweilai.net\/?p=276086"},"modified":"2016-03-16T08:49:05","modified_gmt":"2016-03-16T08:49:05","slug":"how-to-turn-carbon-dioxide-into-sustainable-concrete","status":"publish","type":"post","link":"https:\/\/hoo.central12.com\/fugic\/2016\/03\/15\/how-to-turn-carbon-dioxide-into-sustainable-concrete\/","title":{"rendered":"How to turn carbon dioxide into sustainable concrete"},"content":{"rendered":"<div id=\"attachment_276109\" class=\"wp-caption aligncenter\" style=\"width: 518px;  border: 1px solid #dddddd; background-color: #f3f3f3; padding-top: 4px; margin: 10px; text-align:center; display: block; margin-right: auto; margin-left: auto;\"><a href=\"http:\/\/www.kurzweilai.net\/how-to-turn-carbon-dioxide-into-sustainable-concrete\/new-building-material\" rel=\"attachment wp-att-276109\"><img class=\"size-full wp-image-276109 noshadow\" title=\"new building material\" src=\"http:\/\/www.kurzweilai.net\/images\/new-building-material.jpg\" alt=\"\" width=\"508\" height=\"353\" \/><\/a><p style=' padding: 0 4px 5px; margin: 0;'  class=\"wp-caption-text\">A sample of a new building material created to replace concrete (credit: UCLA Luskin)<\/p><\/div>\n<p>A UCLA research team has developed a plan for capturing carbon from power-plant smokestacks (the largest source of harmful global greenhouse gas in the world) and use it to create a new building material \u2014 CO<sub>2<\/sub>NCRETE \u2014 that would be fabricated using 3D printers while replacing production of cement (which creates about 5 percent of the planet\u2019s greenhouse gas emissions).<\/p>\n<p>\u201cI decided to get involved in this project because it could be a game-changer for climate policy,\u201d\u00a0\u00a0said J.R. DeShazo, professor of public policy at the\u00a0<a href=\"http:\/\/luskin.ucla.edu\/\" >UCLA Luskin School of Public Affairs<\/a>\u00a0and director of the\u00a0<a href=\"http:\/\/innovation.luskin.ucla.edu\/\" >UCLA Luskin Center for Innovation<\/a>. \u201cThis technology tackles global climate change, which is one of the biggest challenges that society faces now and will face over the next century.\u201d<\/p>\n<p><iframe frameborder=\"0\" height=\"281\" src=\"https:\/\/player.vimeo.com\/video\/157380738\" width=\"500\"><\/iframe><br \/>\n<em>UCLA Luskin School of Public Affairs | Carbon upcycling: Turning carbon dioxide into CO<sub>2<\/sub>NCRETE<\/em><\/p>\n<p>DeShazo has provided the public policy and economic guidance for this research. The scientific contributions have been led by Gaurav Sant, associate professor and Henry Samueli Fellow in Civil and Environmental Engineering; Richard Kaner, distinguished professor in chemistry and biochemistry, and materials science and engineering; Laurent Pilon, professor in mechanical and aerospace engineering and bioengineering; and Matthieu Bauchy, assistant professor in civil and environmental engineering.<\/p>\n<p><strong>Beyond just capturing CO2<\/strong><\/p>\n<p>This isn\u2019t the first attempt to capture carbon emissions from power plants. It\u2019s been done before, but the challenge has been what to do with the carbon dioxide\u00a0once it\u2019s captured.<\/p>\n<p>The researchers are excited about the possibility of reducing greenhouse gas in the U.S., especially in regions where coal-fired power plants are abundant. \u201cBut even more so is the promise to reduce the emissions in China and India,\u201d DeShazo said. \u201cChina is currently the largest greenhouse gas producer in the world, and India will soon be number two, surpassing us.\u201d<\/p>\n<p>Thus far, the new construction material has been produced only at a lab scale, using 3-D printers to shape it into tiny cones. \u201cWe have proof of concept that we can do this,\u201d DeShazo said. \u201cBut we need to begin the process of increasing the volume of material and then think about how to pilot it commercially.<\/p>\n<p>\u201cThis technology could change the economic incentives associated with these power plants in their operations and turn the smokestack flue gas into a resource countries can use, to build up their cities, extend their road systems,\u201d DeShazo said. \u201cIt takes what was a problem and turns it into a benefit in products and services that are going to be very much needed and valued in places like India and China.\u201d<\/p>\n<hr \/>\n<p><strong>Abstract of <em>Direct Carbonation of Ca(OH)<sub>2<\/sub> Using Liquid and Supercritical CO<sub>2<\/sub>: Implications for Carbon-Neutral Cementation<\/em><\/strong><\/p>\n<p>By invoking analogies to lime mortars of times past, this study examines the carbonation of portlandite (Ca(OH)<sub>2<\/sub>) by carbon dioxide (CO<sub>2<\/sub>) in the liquid and supercritical states as a potential route toward CO<sub>2<\/sub>-neutral cementation. Portlandite carbonation is noted to be rapid; e.g., &gt;80% carbonation of Ca(OH)<sub>2<\/sub>\u00a0is achieved in 2 h upon contact with liquid CO<sub>2<\/sub>\u00a0at ambient temperatures, and it is only slightly sensitive to the effects of temperature, pressure, and the state of CO<sub>2<\/sub>\u00a0over the range of 6 MPa \u2264\u00a0<em>p<\/em>\u00a0\u2264 10 MPa and 8 \u00b0C \u2264\u00a0<em>T<\/em>\u00a0\u2264 42 \u00b0C. Additional studies suggest that the carbonation of anhydrous ordinary portland cement is slower and far less reliable than that of portlandite. Although cementation is not directly assessed, detailed scanning electron microscopy (SEM) examinations of carbonated microstructures indicate that the carbonation products formed encircle and embed sand grains similar to that observed in lime mortars. The outcomes suggest innovative directions for \u201ccarbon-neutral cementation.\u201d<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A UCLA research team has developed a plan for capturing carbon from power-plant smokestacks (the largest source of harmful global greenhouse gas in the world) and use it to create a new building material &mdash; CO2NCRETE &mdash; that would be fabricated using 3D printers while replacing production of cement (which creates about 5 percent of [&#8230;]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,55,43],"tags":[],"class_list":["post-6236","post","type-post","status-publish","format-standard","hentry","category-environmentclimate","category-nanotechmaterials-science","category-news"],"_links":{"self":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/6236"}],"collection":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/comments?post=6236"}],"version-history":[{"count":1,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/6236\/revisions"}],"predecessor-version":[{"id":6237,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/posts\/6236\/revisions\/6237"}],"wp:attachment":[{"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/media?parent=6236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/categories?post=6236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoo.central12.com\/fugic\/wp-json\/wp\/v2\/tags?post=6236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}