{"id":22771,"date":"2020-11-12T08:06:31","date_gmt":"2020-11-12T08:06:31","guid":{"rendered":"https:\/\/www.lifeandnews.com\/articles\/?p=22771"},"modified":"2020-11-14T15:15:37","modified_gmt":"2020-11-14T15:15:37","slug":"smart-concrete-could-pave-the-way-for-high-tech-cost-effective-roads","status":"publish","type":"post","link":"https:\/\/www.lifeandnews.com\/articles\/smart-concrete-could-pave-the-way-for-high-tech-cost-effective-roads\/","title":{"rendered":"Smart concrete could pave the way for high-tech, cost-effective roads"},"content":{"rendered":"<p><a href=\"https:\/\/theconversation.com\/profiles\/luna-lu-1129203\">Luna Lu<\/a>, <em><a href=\"https:\/\/theconversation.com\/institutions\/purdue-university-1827\">Purdue University<\/a><\/em> and <a href=\"https:\/\/theconversation.com\/profiles\/vishal-saravade-1143900\">Vishal Saravade<\/a>, <em><a href=\"https:\/\/theconversation.com\/institutions\/purdue-university-1827\">Purdue University<\/a><\/em><\/p>\n<p>Every day, Americans travel on roads, bridges and highways without considering the safety or reliability of these structures. Yet much of the transportation infrastructure in the U.S. is outdated, deteriorating and badly in need of repair.<\/p>\n<p>Of the <a href=\"https:\/\/www.infrastructurereportcard.org\/wp-content\/uploads\/2017\/01\/Bridges-Final.pdf\">614,387 bridges<\/a> in the U.S., for example, 39% are older than their designed lifetimes, while nearly 10% are structurally deficient, meaning they could begin to break down faster or, worse, be vulnerable to catastrophic failure.<\/p>\n<p>The cost to repair and improve nationwide transportation infrastructure ranges from nearly <a href=\"https:\/\/www.infrastructureusa.org\/the-interstate-highway-system-turns-60-challenges-to-its-ability-to-continue-to-save-lives-time-and-money\/\">US$190 billion<\/a> to <a href=\"https:\/\/www.artba.org\/government-affairs\/policy-statements\/highways-policy\/\">almost $1 trillion<\/a>. Repairing U.S. infrastructure costs individual households, on average, about <a href=\"https:\/\/www.infrastructurereportcard.org\/wp-content\/uploads\/2016\/05\/ASCE-Failure-to-Act-Report-for-Web-5.23.16.pdf\">$3,400 every year<\/a>. Traffic congestion alone is estimated to cost the average driver <a href=\"https:\/\/inrix.com\/press-releases\/2019-traffic-scorecard-us\/\">$1,400<\/a> in fuel and <a href=\"https:\/\/static.tti.tamu.edu\/tti.tamu.edu\/documents\/mobility-report-2019.pdf\">time spent commuting<\/a>, a nationwide tally of <a href=\"https:\/\/www.infrastructurereportcard.org\/wp-content\/uploads\/2019\/02\/Full-2017-Report-Card-FINAL.pdf\">more than $160 billion per year<\/a>.<\/p>\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/6HpaCVGeSHc?wmode=transparent&amp;start=1\" width=\"440\" height=\"260\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><figcaption><span class=\"caption\">The Purdue engineering lab has installed smart technology in three Indiana interstate highways.<\/span><\/figcaption><\/figure>\n<p>I am a <a href=\"https:\/\/scholar.google.com\/citations?user=iAdjF78AAAAJ&amp;hl=en\">professor<\/a> in the Lyles School of Civil Engineering and the director of the <a href=\"https:\/\/engineering.purdue.edu\/CII\/index_html\">Center for Intelligent Infrastructures<\/a> at Purdue University. My co-author, <a href=\"https:\/\/scholar.google.com\/citations?user=8k5XKIwAAAAJ&amp;hl=en\">Vishal Saravade<\/a>, is part of my team at the <a href=\"https:\/\/engineering.purdue.edu\/SMARTLab\">Sustainable Materials and Renewable Technology (SMART) Lab<\/a>. The SMART Lab researches and develops new technologies to make American infrastructure \u201cintelligent,\u201d safer and more cost-effective. These new systems self-monitor the condition of roads and bridges quickly and accurately and can, sometimes, even repair themselves.<\/p>\n<h2>Smart, self-healing concrete<\/h2>\n<p>Infrastructure \u2013 bridges, highways, pavement \u2013 deteriorates over time with continuous use. The life of structures could be extended, however, if damages were monitored in real time and <a href=\"https:\/\/www.purdue.edu\/newsroom\/releases\/2020\/Q3\/expert-tech-that-could-reduce-summer-road-construction.html\">fixed early on<\/a>. In the northern U.S., for example, freeze-thaw cycles in winter cause water to seep into the pavement where it freezes, expands and enlarges cracks, which can cause significant damage. If left unrepaired, this damage may propagate and break down pavements and bridges.<\/p>\n<figure class=\"align-center zoomable\"><a href=\"https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip\"><img src=\"https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\" sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\" srcset=\"https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=223&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=223&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=223&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=281&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=281&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/355016\/original\/file-20200827-16-16y6zin.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=281&amp;fit=crop&amp;dpr=3 2262w\" alt=\"Self-healing concrete embedded with super polymers.\" \/><\/a><figcaption><span class=\"caption\">Self-healing concrete test study with cracked concrete (left) and self-healed concrete after 28 days (right).<\/span><br \/>\n<span class=\"attribution\"><span class=\"source\">SMART Lab\/Purdue University<\/span>, <a class=\"license\" href=\"http:\/\/creativecommons.org\/licenses\/by-nd\/4.0\/\">CC BY-ND<\/a><\/span><\/figcaption><\/figure>\n<p>Such damage can be identified and repaired autonomously. At an early stage of a crack, for example, <a href=\"https:\/\/www.purdue.edu\/newsroom\/releases\/2020\/Q2\/enabling-highways-and-bridges-to-prevent-their-own-damage.html\">self-healing pavement<\/a> would activate super absorbent polymers to absorb water and produce concrete-like material that fills in the crack. Cracks as small as a few microns could be <a href=\"https:\/\/aashtojournal.org\/2020\/06\/12\/purdue-researchers-seek-to-create-smart-concrete\/\">healed to prevent significant damage<\/a> by preventing or delaying the later stages of the freeze-thaw cycle.<\/p>\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/p-g_0wyhV9E?wmode=transparent&amp;start=0\" width=\"440\" height=\"260\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><figcaption><span class=\"caption\">The astonishing properties of absorbent polymers.<\/span><\/figcaption><\/figure>\n<h2>Roadway technology<\/h2>\n<p>Many researchers in the world are working on improving construction infrastructure. Technologies recently being explored include <a href=\"https:\/\/royalsocietypublishing.org\/doi\/pdf\/10.1098\/rspa.2019.0439\">solar and energy-harvesting roads, charging lanes for electric vehicles, smart streetlights<\/a> and <a href=\"https:\/\/www.scientificamerican.com\/article\/cement-producers-are-developing-a-plan-to-reduce-co2-emissions\/\">reducing carbon-related emissions from construction materials<\/a>.<\/p>\n<p>At the Purdue SMART Lab, our team is also testing novel sensors that monitor transportation infrastructure by embedding them in several Indiana interstate highways. We plan to expand to other state highway systems in the next few years with a goal to better accommodate <a href=\"https:\/\/theconversation.com\/traffic-congestion-reconsidered-111921\">increased traffic<\/a> and provide accurate estimates of road conditions during construction and its life.<\/p>\n<figure class=\"align-center zoomable\"><a href=\"https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip\"><img src=\"https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\" sizes=\"(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\" srcset=\"https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/355020\/original\/file-20200827-16-4sfgrv.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=3 2262w\" alt=\"\" \/><\/a><figcaption><span class=\"caption\">Sensors installed on Indiana interstate I-74.<\/span><br \/>\n<span class=\"attribution\"><span class=\"source\">Erin Easterling\/Purdue University<\/span>, <a class=\"license\" href=\"http:\/\/creativecommons.org\/licenses\/by-nd\/4.0\/\">CC BY-ND<\/a><\/span><\/figcaption><\/figure>\n<p>Sensors embedded in concrete pavement acquire information about the infrastructure\u2019s health condition in real time and communicate the data to computers. Electrical signals are applied through the sensors. Concrete\u2019s vibrations are converted into electrical signals that are read and analyzed by lab-built customized software. This enables transportation engineers to make effective and data-driven decisions from opening roads to traffic and to proactively identifying issues that cause damage or deterioration.<\/p>\n<p>After concrete is poured for highway pavement, for example, it takes hours to cure and become strong enough to open for traffic. The timing of when to open a highway depends on when the concrete mix is cured. If a roadway opens too early and the concrete is undercured, it can reduce the life expectancy of the pavement and increase maintenance costs. Waiting too long to open a road can result in traffic delays, congestion and increased safety risks for construction workers and commuters. Curing concrete for massive highway projects requires close attention by engineers in conjunction with the weather specific to that region.<\/p>\n<figure><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/LS0zXtIa2PA?wmode=transparent&amp;start=7\" width=\"440\" height=\"260\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><figcaption><span class=\"caption\">Sensors embedded in concrete can signal the health of roadways. Video by Erin Easterling\/Purdue University.<\/span><\/figcaption><\/figure>\n<p><a href=\"https:\/\/doi.org\/10.1016\/j.conbuildmat.2019.07.164\">Smart sensors embedded in concrete<\/a> enable engineers to monitor the infrastructure and make data-driven decisions about when a road can open while retaining maximum life expectancy. Sensors can also help monitor the quality of concrete and whether it is robust enough to withstand traffic flow and corrosion after a roadway is opened. <a href=\"https:\/\/www.evaluationengineering.com\/applications\/environmental-test\/article\/21138925\/purdue-university-aidriven-monitoringmaintenance-solution-enables-selfhealing-roads-and-bridges\">Smart, efficient infrastructure<\/a> can significantly reduce structural failures, both catastrophic and through normal wear, as well as lead to reduced costs and provide new ways for structural engineers to assess real-time information about the pavement.<\/p>\n<p>[<em>Get our best science, health and technology stories.<\/em> <a href=\"https:\/\/theconversation.com\/us\/newsletters\/science-editors-picks-71\/?utm_source=TCUS&amp;utm_medium=inline-link&amp;utm_campaign=newsletter-text&amp;utm_content=science-best\">Sign up for The Conversation\u2019s science newsletter<\/a>.]<\/p>\n<h2>Saving time and money<\/h2>\n<p>Congress recognizes the need to invest in American transportation systems. A $494 billion legislation package, the <a href=\"https:\/\/transportation.house.gov\/imo\/media\/doc\/2020%20INVEST%20in%20America%20Bill%20Summary.pdf\">INVEST In America Act<\/a>, was recently introduced to address America\u2019s deteriorating highways and bridges while diminishing carbon pollution.<\/p>\n<p>Smart sensors and intelligent infrastructure system can enable significant savings of time and money with improved construction safety. Sensors can provide engineers with real-time data of the quality of our infrastructure to make the best decisions for building and maintaining roads, bridges and pavements while improving safety for drivers and construction workers. The addition of self-repairing properties can help build sustainable and long-lasting infrastructure to reduce maintenance and costs.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img loading=\"lazy\" style=\"border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important; text-shadow: none !important;\" src=\"https:\/\/counter.theconversation.com\/content\/141350\/count.gif?distributor=republish-lightbox-basic\" alt=\"The Conversation\" width=\"1\" height=\"1\" \/><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https:\/\/theconversation.com\/republishing-guidelines --><\/p>\n<p><a href=\"https:\/\/theconversation.com\/profiles\/luna-lu-1129203\">Luna Lu<\/a>, ACPA Scholar &amp; Professor Of Civil Engineering, <em><a href=\"https:\/\/theconversation.com\/institutions\/purdue-university-1827\">Purdue University<\/a><\/em> and <a href=\"https:\/\/theconversation.com\/profiles\/vishal-saravade-1143900\">Vishal Saravade<\/a>, Post-doctoral Scientist, <em><a href=\"https:\/\/theconversation.com\/institutions\/purdue-university-1827\">Purdue University<\/a><\/em><\/p>\n<p>This article is republished from <a href=\"https:\/\/theconversation.com\">The Conversation<\/a> under a Creative Commons license. Read the <a href=\"https:\/\/theconversation.com\/smart-concrete-could-pave-the-way-for-high-tech-cost-effective-roads-141350\">original article<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Luna Lu, Purdue University and Vishal Saravade, Purdue University Every day, Americans travel on roads, bridges and highways without considering the safety or reliability of these structures. Yet much of the transportation infrastructure in the U.S. is outdated, deteriorating and badly in need of repair. Of the 614,387 bridges in the U.S., for example, 39% [&hellip;]<\/p>\n","protected":false},"author":44,"featured_media":22772,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3410],"tags":[3881,3882,2021,1668,8281,3098,4744],"_links":{"self":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/22771"}],"collection":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/users\/44"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/comments?post=22771"}],"version-history":[{"count":2,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/22771\/revisions"}],"predecessor-version":[{"id":22783,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/22771\/revisions\/22783"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/media\/22772"}],"wp:attachment":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/media?parent=22771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/categories?post=22771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/tags?post=22771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}