{"id":36487,"date":"2014-06-30T19:09:26","date_gmt":"2014-06-30T19:09:26","guid":{"rendered":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/article\/modernizing-an-interstate_o"},"modified":"2014-06-30T19:09:26","modified_gmt":"2014-06-30T19:09:26","slug":"modernizing-an-interstate_o","status":"publish","type":"post","link":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/projects\/infrastructure\/modernizing-an-interstate_o\/","title":{"rendered":"Modernizing an interstate"},"content":{"rendered":"<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"> <\/div><div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"> <p class=\"wp-block-paragraph\">Last year, Utah\u2019s only north-south interstate was modernized using a technique that saved money that was spent on roads and bridges elsewhere in the state: concrete pavement preservation (CPP) with transverse dowel bars.<\/p> <p class=\"wp-block-paragraph\">The 15-mile stretch of Interstate 15 ranged in age from about 20 to more than 35 years old but was in good enough condition to save. Built before transverse dowel bars in new pavements became standard practice, the pavement was faulting, or \u201cthumping,\u201d which produced a rough ride.<\/p> <p class=\"wp-block-paragraph\">The Utah DOT (UDOT) included dowel bar retrofit in the rehabilitation because the aggregate interlock that had originally provided load-transfer capability between slabs was worn away. The bars were needed to reestablish load transfer at the joints.<\/p> <p class=\"wp-block-paragraph\">The dowel bars used were epoxy-coated steel rods measuring 1\u00bdx18 inches and precoated with bond-breaking compound. Crews placed the bars in groups of three, one group under each wheel path, and spaced them 12 inches center-to-center. The project used 163,000 bars. Traffic was kept off of the surface until it reached a compressive strength of 3,000 psi.<\/p> <p class=\"wp-block-paragraph\">Specifications unique to UDOT included removing the foam core board to a depth of 2 inches and resealing; Grinding was to begin within 10 working days of placement. Tests were performed on 24 retrofits selected by an agency engineer. Cores were taken to verify that concrete had been properly removed from the slots, the dowels properly placed, and that consolidation had been properly performed. <\/p><\/div> ","protected":false},"excerpt":{"rendered":"<p>Last year, Utah\u2019s only north-south interstate was modernized using a technique that saved money that was spent on roads and bridges elsewhere in the state: concrete pavement preservation (CPP) with transverse dowel bars. The 15-mile stretch of Interstate 15 ranged in age from about 20 to more than 35 years old but was in good [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":36489,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"scheduledNewsletterDates":[],"_scheduled_newsletter_id":0,"footnotes":"","jetpack_post_was_ever_published":false,"zonda_content_type_url_append":"_o","zonda_dfp_zone":"","zonda_exclude_recommended_contents":false,"zonda_exclude_most_popular":false,"zonda_exclude_tagged_results":false,"zonda_eyebrow":"Project of the Month","zonda_last_newsletter_date":"2099-12-31T23:59:59.999-05:00","zonda_original_url":"","zonda_pdf_version":0,"zonda_print_headline":"Rebuilt to last","zonda_promo_abstract":"Even after decades of use, the pavement was still in good enough condition to save, so UDOT elected to perform concrete pavement preservation (CPP).","zonda_promo_headline":"","zonda_promo_image":0,"zonda_subheadline":""},"tags":[],"news_item_type":[9],"section_10":[83124],"subject":[581,629,872,12845,50284,30151,50449,983],"organization":[],"award":[],"person":[],"product_type_10":[],"content-group":[],"event":[],"location":[],"state":[1000],"brand":[21460],"jlc-category":[],"year_tax":[],"sponsor":[],"coauthors":[84735],"class_list":["post-36487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","news_item_type-project-article","section_10-infrastructure","subject-bridges-and-culverts","subject-concrete","subject-concrete-construction","subject-pavement","subject-properties-of-hardened-concrete","subject-roadways","subject-specifications","subject-traffic-control","state-utah","brand-public-works"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Modernizing an interstate<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/projects\/infrastructure\/modernizing-an-interstate_o\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Modernizing an interstate\" \/>\n<meta property=\"og:description\" content=\"Last year, Utah\u2019s only north-south interstate was modernized using a technique that saved money that was spent on roads and bridges elsewhere in the state: concrete pavement preservation (CPP) with transverse dowel bars. The 15-mile stretch of Interstate 15 ranged in age from about 20 to more than 35 years old but was in good [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/projects\/infrastructure\/modernizing-an-interstate_o\/\" \/>\n<meta property=\"og:site_name\" content=\"Concrete Construction Magazine\" \/>\n<meta property=\"article:published_time\" content=\"2014-06-30T19:09:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/wp-content\/uploads\/sites\/10\/2014\/62482485-igga-dowel-bar-retrofit-assembly-train-tcm111-2149395.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1264\" \/>\n\t<meta property=\"og:image:height\" content=\"948\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" 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