{"id":171358,"date":"2025-12-08T07:39:00","date_gmt":"2025-12-08T06:39:00","guid":{"rendered":"https:\/\/renewable-carbon.eu\/news\/?p=171358"},"modified":"2025-12-05T13:23:37","modified_gmt":"2025-12-05T12:23:37","slug":"coffee-waste-helps-make-lower-carbon-concrete","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/coffee-waste-helps-make-lower-carbon-concrete\/","title":{"rendered":"Coffee waste helps make lower carbon concrete"},"content":{"rendered":"\n\n
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\"Professor
Professor Jie Li, Dr Rajeev Roychand and Dr Mohammad Saberian (left to right) with coffee biochar in their lab at RMIT University. Credit: Carelle Mulawa-Richards, RMIT University<\/figcaption><\/figure><\/div>\n\n\n

A life-cycle analysis has shown, for the first time, that biochar made from spent coffee grounds can help produce a lower\u2011carbon concrete while supporting strength benefits seen in earlier lab trials.<\/strong><\/p>\n\n\n\n

Earlier experiments by the RMIT team heated used coffee grounds at about 350 degrees Celsius without oxygen to make a fine biochar. When this replaced 15 percent of sand in concrete, 28\u2011day strength increased by about 30 per cent, pointing to a practical way to reduce pressure on natural sand supplies.<\/p>\n\n\n\n

Building on that foundation, a new study led by Dr Jingxuan Zhang and Dr Mohammad Saberian presents a comprehensive life cycle assessment \u2013 a cradle\u2011to\u2011grave analysis that measures carbon emissions, resource use and other environmental impacts from production through to end of life.<\/p>\n\n\n

\n
\"Dr
Dr Jingxuan Zhang. Credit: Will Wright, RMIT University<\/figcaption><\/figure><\/div>\n\n\n

The results show life\u2011cycle carbon dioxide reductions of 15 percent, 23 percent and 26 per cent at 5, 10 and 15 per cent biochar replacing sand, along with up to 31 percent lower use of fossil fuels and improvements in impacts on rivers and lakes.<\/p>\n\n\n\n

This research supports Australia\u2019s shift to a circular economy and net\u2011zero goals by turning abundant waste into functional materials, reducing reliance on natural sand and building public engagement with resource recovery.<\/p>\n\n\n\n

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Zhang<\/strong> said the findings strengthened the case for real\u2011world trials. \u201cWe showed that coffee biochar can cut concrete\u2019s carbon footprint in the scenarios we assessed, while earlier trials demonstrated strength gains using the same approach,\u201d said Zhang from the School of Engineering.<\/p>\n\n\n\n

Professor Chun-Qing Li<\/strong>, who provided guidance to the team, said the innovation turned organic waste into a practical ingredient for lower\u2011carbon infrastructure.<\/p>\n\n\n\n

\u201cUsing moderate amounts of coffee biochar offers a clear, measurable pathway to lower\u2011impact concrete,\u201d he said.<\/p>\n\n\n\n

Saberian<\/strong> said the team was already engaging with industry as well as state and local governments on construction projects.<\/p>\n\n\n\n

\u201cNext steps include larger pilots, mix optimisation and alignment with standards so projects can adopt this confidently,\u201d he<\/strong> said.<\/p>\n\n\n\n

\u201cWe welcome collaboration on supply chains and field deployments.\u201d<\/p>\n<\/blockquote>\n\n\n

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\"Dr
Dr Rajeev Roychand (back left) with BildGroup employees who are RMIT alumni including the CEO Stephen Hill (second from right, at the back) at the site of the Pakenham Roads Upgrade. Credit: Pete Glenane, HiVis Pictures<\/figcaption><\/figure><\/div>\n\n\n

RMIT and partners have already advanced public demonstrations, including a footpath pilot and the first coffee\u2011biochar concrete section on the Victorian Big Build, and showcased the concept through the National Gallery of Victoria\u2019s Making Good: Redesigning the Everyday<\/a> exhibition.<\/p>\n\n\n\n

Prospective industry and government partners interested in pilots, product development or supply\u2011chain scale\u2011up can contact RMIT\u2019s research partnerships team at research.partnerships@rmit.edu.au<\/a><\/p>\n\n\n

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\"Council
Council officers and the RMIT research team were present for the pour of the coffee concrete for the footpath trial in Gisborne. Credit: Carelle Mulawa-Richards, RMIT University<\/figcaption><\/figure><\/div>\n\n\n

The study, \u2018Carbon footprint reduction in concrete using spent coffee grounds biochar: a life cycle perspective\u2019<\/a>, is published in the International Journal of Construction Management <\/em>(DOI: 10.1080\/15623599.2025.2584549).<\/p>\n\n\n\n

Jingxuan Zhang, Mohammad Saberian, Rajeev Roychand, Jie Li, Chun-Qing Li, Guomin Zhang and Dilan Robert are authors on the paper.<\/p>\n","protected":false},"excerpt":{"rendered":"

A life-cycle analysis has shown, for the first time, that biochar made from spent coffee grounds can help produce a lower\u2011carbon concrete while supporting strength benefits seen in earlier lab trials. Earlier experiments by the RMIT team heated used coffee grounds at about 350 degrees Celsius without oxygen to make a fine biochar. When this […]<\/p>\n","protected":false},"author":114,"featured_media":171361,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","nova_meta_subtitle":"RMIT researchers are advancing new ways to cut the carbon footprint of infrastructure by turning everyday organic waste into useful construction materials","footnotes":""},"categories":[5572],"tags":[12738,22793,5838,10416,11749],"supplier":[13483],"class_list":["post-171358","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bio-based","tag-biochar","tag-bioconcrete","tag-bioeconomy","tag-circulareconomy","tag-construction","supplier-rmit-university-melbourne-aus"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/171358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/114"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=171358"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/171358\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media\/171361"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=171358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=171358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=171358"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=171358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}