{"id":104848,"date":"2026-10-28T12:02:59","date_gmt":"2026-10-28T11:02:59","guid":{"rendered":"https:\/\/www.systra.com\/denmark\/?p=104848"},"modified":"2026-11-12T12:10:33","modified_gmt":"2026-11-12T11:10:33","slug":"waste-incineration-bottom-ash-as-a-sustainable-alternative-oresund-motorway-expansion","status":"publish","type":"post","link":"https:\/\/www.systra.com\/denmark\/en\/news\/forbraendingsslagger-som-baeredygtig-erstatning-oeresundsmotorvejens-udvidelse-2\/","title":{"rendered":"Waste incineration bottom ash as a sustainable alternative \u2013 \u00d8resund Motorway expansion"},"content":{"rendered":"\n<h2 id=\"h-a-focus-on-sustainability-and-innovative-use-of-materials\" class=\"wp-block-heading\">A focus on sustainability and innovative use of materials<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">If you drive along the stretch between the Amager Motorway and the airport, you can\u2019t miss the major roadworks underway. The existing motorway is being widened with an additional lane along its busiest section, including the junctions towards the Amager Motorway and central Copenhagen. Nearly 100,000 motorists use this stretch every day.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-image-fill-element has-griplusclair-background-color has-background\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-768x1024.jpg\" alt=\"\" class=\"wp-image-100519 size-full\" style=\"object-position:50% 50%\" srcset=\"https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-768x1024.jpg 768w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-225x300.jpg 225w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-1152x1536.jpg 1152w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-1536x2048.jpg 1536w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-474x632.jpg 474w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-1700x2267.jpg 1700w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-1352x1803.jpg 1352w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-800x1067.jpg 800w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-180x240.jpg 180w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-153x204.jpg 153w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-230x307.jpg 230w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/oeresundsmotorvejen-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Different materials are being used along this stretch, and for good reason. Traditional sand and gravel are extracted from quarries, and their use is not particularly sustainable due to the resources required for extraction. Incinerator bottom ash, by contrast, is a by-product of waste incineration\u2014the material left after waste is burned\u2014and can be recycled as a more sustainable alternative.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The incinerator bottom ash is stored in stockpiles, where it absorbs CO\u2082 and binds heavy metals as it cools. It is then sorted into different particle sizes, allowing it to be graded to match the particle-size distributions of conventional sub-base aggregate and capping sand. This makes it both a more sustainable and a practical material.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The new guidelines on the use of incinerator bottom ash, published in 2024, now allow it to be used on motorways and in the unbound base course.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"h-better-infrastructure-and-sustainable-road-construction\" class=\"wp-block-heading\">Better infrastructure and sustainable road construction<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Working with SWECO, SYSTRA established that incinerator bottom ash aggregate can be used in the construction of the \u00d8resund Motorway. Its expansion will therefore be the first motorway project in Denmark to use this sustainable material.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The use of incinerator bottom ash must, of course, comply with environmental regulations. For example, the material must not be placed too close to drinking water wells or protected natural areas. These requirements have been met on the project, meaning the motorway expansion can improve infrastructure while also contributing to more sustainable road construction in Denmark.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">To prevent long-term impacts on the surrounding environment, a membrane is installed around the embankment. This helps ensure that water cannot seep through the incinerator bottom ash in areas where there is no impermeable layer above it, reducing the risk of unwanted leaching of potentially harmful heavy metals over time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During construction, detailed procedures also govern how the material is handled and placed. For example, the stockpile used at each location is recorded, providing traceability and oversight for this relatively new road construction material.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile is-image-fill-element has-griplusclair-background-color has-background\" style=\"grid-template-columns:auto 35%\"><div class=\"wp-block-media-text__content\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">By making incinerator bottom ash a key component of the road structure, we are taking an important step towards more sustainable infrastructure. It is not only a sustainable choice but also a practical one: the material offers good strength properties and reduces its carbon footprint during maturation. We are proud to be among the first to implement this technology in a Danish motorway project, and look forward to continuing our work to create the greener roads of the future.<\/p>\n<cite>Gustav Brandt-Pedersen, Consultant in the Roads &amp; Planning Department at SYSTRA Denmark<\/cite><\/blockquote>\n<\/div><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-1024x683.jpg\" alt=\"\" class=\"wp-image-100520 size-full\" style=\"object-position:57% 38%\" srcset=\"https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-1024x683.jpg 1024w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-300x200.jpg 300w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-768x512.jpg 768w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-1536x1024.jpg 1536w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-2048x1365.jpg 2048w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-375x250.jpg 375w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-474x316.jpg 474w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-75x50.jpg 75w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-900x600.jpg 900w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-1700x1133.jpg 1700w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-1352x901.jpg 1352w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-800x533.jpg 800w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-180x120.jpg 180w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-153x102.jpg 153w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-230x153.jpg 230w, https:\/\/www.systra.com\/denmark\/wp-content\/uploads\/sites\/26\/2026\/10\/gbrandt-pedersen-517x345-2.jpg 517w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">As an added benefit, there is a site in \u00d8restad where incinerator bottom ash is stockpiled. This means the material does not need to be transported over long distances, further reducing its carbon footprint.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>On 23 May 2024, the Danish Parliament passed legislation authorising the expansion of the \u00d8resund Motorway. SYSTRA, working with SWECO as subconsultant, carried out a study for Sund &#038; B\u00e6lt into options for widening the motorway. SYSTRA has now implemented an innovative, sustainable solution for the expansion, using waste incineration bottom ash as an alternative to the traditional layers of crushed aggregate and sand in the road pavement.<\/p>\n","protected":false},"author":102,"featured_media":100523,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"13359,482,15094,24093,10588,45614","_relevanssi_noindex_reason":"","footnotes":""},"categories":[14265],"tags":[],"class_list":["post-104848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-da"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - 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