{"id":81455,"date":"2023-09-21T03:01:55","date_gmt":"2023-09-21T01:01:55","guid":{"rendered":"https:\/\/blog.bluebeam.com\/se\/?p=81455"},"modified":"2023-09-04T15:38:03","modified_gmt":"2023-09-04T13:38:03","slug":"diapers-to-concrete-construction","status":"publish","type":"post","link":"https:\/\/blog.bluebeam.com\/se\/diapers-to-concrete-construction\/","title":{"rendered":"En ny bas f\u00f6r betong: anv\u00e4nda bl\u00f6jor"},"content":{"rendered":"\n<p class=\"has-drop-cap\">Den h\u00e4r typen av forskningsprojekt kan l\u00e5ta lite som ett sk\u00e4mt \u2013 att tillverka betong delvis av anv\u00e4nda bl\u00f6jor. Men det \u00e4r faktiskt tillr\u00e4ckligt seri\u00f6st f\u00f6r att <a href=\"https:\/\/www.nature.com\/articles\/s41598-023-32981-y\" target=\"_blank\" rel=\"noreferrer noopener\">publiceras i Scientific Reports<\/a>, en expertgranskad tidskrift som ges ut av Nature Portfolio.<\/p>\n\n\n\n<p>Forskare vid Kitakyushu-universitetet i Japan har experimenterat och kommit fram till att s\u00f6nderhackade, rengjorda bl\u00f6jor kan ers\u00e4tta upp till 10 % av kompositmaterialet i en betongblandning som anv\u00e4nds f\u00f6r att bygga env\u00e5ningsbyggnader och hela 40 % f\u00f6r icke-konstruktionsm\u00e4ssiga och arkitektoniska komponenter som golv och v\u00e4ggar som inte \u00e4r b\u00e4rande.<\/p>\n\n\n\n<p>Hur de fick id\u00e9n till att testa med bl\u00f6jor \u00e4r en hel ber\u00e4ttelse i sig. Forskarna \u2013 varav en \u00e4r fakultetsmedlem och \u00f6vriga doktorander \u2013 hade arbetat med att inf\u00f6rliva avfallsprodukter i betong. De hade tidigare med viss framg\u00e5ng experimenterat med plastflaskor och biprodukter av tr\u00e4. Sedan fick de ett samtal.<\/p>\n\n\n\n<p>\u201dDen tidigare forskningen lockade till sig ett f\u00f6retag som utmanade oss och finansierade v\u00e5rt f\u00f6rs\u00f6k att utnyttja bl\u00f6jorna\u201d, s\u00e4ger Siswanti Zuraida, medf\u00f6rfattare och doktorand fr\u00e5n Indonesien som skulle f\u00f6rsvara sin avhandling veckan efter sitt samtal med <em>Built<\/em>.<\/p>\n\n\n\n<p>Sk\u00e4let var praktiskt. F\u00f6retaget, Awina Sinergi International i Indonesien, sysslar med f\u00f6rnybar energi och avfallshantering. Landet \u00e4r det fj\u00e4rde mest folkrika i v\u00e4rlden enligt Oxfam. Det finns behov av bost\u00e4der till rimligt pris f\u00f6r m\u00e5nga miljoner m\u00e4nniskor.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-accent-color has-alpha-channel-opacity has-accent-background-color has-background\" \/>\n\n\n\n<h4 class=\"wp-block-heading\">OCKS\u00c5 P\u00c5 BUILT:<\/h4>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Photography of Builders, Not Buildings\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/oUKk8r5y7Lk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-accent-color has-alpha-channel-opacity has-accent-background-color has-background\" \/>\n\n\n\n<p>Som artikelf\u00f6rfattarna konstaterade \u00e4r \u201dbyggnadsmaterial \u00e4r ofta den enskilt st\u00f6rsta insatsen i ett byggprojekt och kan utg\u00f6ra upp till 80 % av det totala v\u00e4rdet av ett enkelt bostadshus\u201d. Den kostnaden \u00e4r \u201ddet f\u00f6rsta hindret f\u00f6r h\u00e5llbart byggande\u201d.<\/p>\n\n\n\n<p>De l\u00e4nder som kr\u00e4ver traditionella material och byggmetoder \u2013 \u201dav vilka majoriteten antingen \u00e4r en kvarleva fr\u00e5n kolonialismens dagar eller har importerats fr\u00e5n andra l\u00e4nder\u201d \u2013 skapar ytterligare ekonomiska hinder. I Indonesien sl\u00e4par det \u00e5rliga bostadsbyggandet redan efter med 300 000 enheter. Landet har \u00e4ven en allt st\u00f6rre tillg\u00e5ng p\u00e5 anv\u00e4nda eng\u00e5ngsbl\u00f6jor med tanke p\u00e5 den v\u00e4xande befolkningen. Att anv\u00e4nda bl\u00f6jorna f\u00f6r att tillverka betong skulle medf\u00f6ra tre f\u00f6rdelar: minskade byggkostnader, mindre avfall till deponi och konstruktionsm\u00e4ssiga f\u00f6rdelar f\u00f6r betongen, till exempel f\u00f6rb\u00e4ttrad intern h\u00e4rdningshydrering.<\/p>\n\n\n\n<p>Forskningen startade 2020. \u201dJ\u00e4mf\u00f6rt med tidigare forskning var de h\u00e4r bl\u00f6jorna n\u00e5got av en utmaning f\u00f6r oss\u201d, s\u00e4ger Siswanti. De var tvungna att ta bl\u00f6jorna, separera ut de m\u00e4nskliga exkrementerna, tv\u00e4tta det som \u00e5terstod, tills\u00e4tta kemikalier f\u00f6r att s\u00e4kerst\u00e4lla hygien och sanitet och sedan sk\u00e4ra bl\u00f6jorna i sm\u00e5 bitar. Lyckligtvis hade teamet ytterligare en medlem som kunde hj\u00e4lpa till p\u00e5 en front. \u201dJag hade f\u00e5tt en bebis, som nu \u00e4r 3 \u00e5r gammal, och jag samlade mitt barns bl\u00f6jor i tv\u00e5 m\u00e5nader\u201d, ber\u00e4ttar hon.<\/p>\n\n\n\n<p>Teamet skapade sedan sex olika prover med blandningar av bl\u00f6jor, sand, grus, cement och vatten, h\u00e4rdade proverna i 28 dagar och testade dem sedan f\u00f6r hur stort tryck de t\u00e5lde innan de gick s\u00f6nder. Forskarna ber\u00e4knade sedan hur stor andel bl\u00f6jor som kunde anv\u00e4ndas f\u00f6r att bygga en planl\u00f6sning p\u00e5 36 kvadratmeter som skulle uppfylla indonesiska byggstandarder. Sedan var det dags f\u00f6r en byggnadsprototyp.<\/p>\n\n\n\n<p>Den goda nyheten var att det inte luktade. I alla fall inte efter att betongen hade h\u00e4rdats. Men innan? \u201dD\u00e5 luktade det, s\u00e5 vi var tvungna att b\u00e4ra munskydd\u201d, skrattar Siswanti.<\/p>\n\n\n\n<p>\u201dMaterialets partikelstorlek p\u00e5verkar h\u00e5llfastheten\u201d, s\u00e4ger hon. Ju finare material, desto b\u00e4ttre f\u00f6rdelas det genom betongen. Det var en utmaning p\u00e5 forskningsstadiet. \u201dEftersom vi gjorde arbetet manuellt klippte vi bl\u00f6jorna med sax, s\u00e5 vi kunde inte styra bl\u00f6jornas partikelstorlek.\u201d<\/p>\n\n\n\n<p>Det finns f\u00f6retag som reng\u00f6r och behandlar eng\u00e5ngsbl\u00f6jor, och separerar organiskt material och plast f\u00f6r att \u00e5tervinna dem. Det resulterande materialet blir till biomassa f\u00f6r f\u00f6rbr\u00e4nning, men de befintliga anl\u00e4ggningar som hanterar materialet ligger alla i utvecklade l\u00e4nder. F\u00f6r att kunna anv\u00e4nda bl\u00f6jor f\u00f6r att bygga i utvecklingsl\u00e4nder skulle m\u00f6jligheten att bearbeta dem lokalt vara viktig.<\/p>\n\n\n\n<p>Det finns ocks\u00e5 andra \u00e5tg\u00e4rder som m\u00e5ste vidtas innan den h\u00e4r processen kan bli tillg\u00e4nglig f\u00f6r byggf\u00f6retagen. F\u00f6r att bearbeta bl\u00f6jorna skulle man beh\u00f6va inkludera en kemisk f\u00f6rening som forskarna har utvecklat f\u00f6r att reglera bl\u00f6jornas vattenabsorption, vilken annars skulle bli \u201den utmaning f\u00f6r l\u00e4nder med begr\u00e4nsade vattenk\u00e4llor\u201d, s\u00e4ger Siswanti.<\/p>\n\n\n\n<p>Men forskarna verkar optimistiska och s\u00e4kra p\u00e5 sin sak \u2013 de har redan ans\u00f6kt om patent, \u00e4ven om utredningen och det slutliga godk\u00e4nnandet kan ta n\u00e5gra \u00e5r. Det \u00e4r dock ganska troligt att h\u00f6gen med bl\u00f6jor bara kommer att v\u00e4xa sig st\u00f6rre med tiden.<\/p>\n\n\n\n<div style=\"background-color:#111;text-align:center\" class=\"wp-block-atomic-blocks-ab-cta ab-block-cta\"><div class=\"ab-cta-image-wrap\"><img decoding=\"async\" class=\"ab-cta-image has-background-dim-60 has-background-dim\" src=\"https:\/\/blog.bluebeam.com\/se\/wp-content\/uploads\/sites\/4\/2023\/02\/BB23-01-How-Tech-Can-Help-Construction-Blog-Feature-1.jpg\" alt=\"Angel City Lumber\" \/><\/div><div class=\"ab-cta-content\"><h2 class=\"ab-cta-title ab-font-size-32\" style=\"color:#FFF\"><strong>S\u00e5 kan teknologi hj\u00e4lpa byggbranschen under en period av ekonomisk os\u00e4kerhet<\/strong><\/h2><div class=\"ab-cta-text ab-font-size-32\" style=\"color:#FFF\"><\/div><\/div><div class=\"ab-cta-button\"><a href=\"https:\/\/blog.bluebeam.com\/se\/tech-construction-recession\/\" target=\"_self\" rel=\"noopener noreferrer\" class=\"ab-button ab-button-shape-rounded ab-button-size-medium\" style=\"color:#ffffff;background-color:#3373dc\">L\u00e4s mer<\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Forskare vid Kitakyushu-universitetet i Japan har uppt\u00e4ckt att s\u00f6nderhackade, rengjorda bl\u00f6jor kan ers\u00e4tta upp till 10 % av kompositmaterialet i en betongblandning som anv\u00e4nds f\u00f6r att bygga env\u00e5ningsbyggnader och hela 40 % f\u00f6r icke-konstruktionsm\u00e4ssiga och arkitektoniska komponenter<\/p>\n","protected":false},"author":643,"featured_media":81456,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[145],"tags":[16721,16715,16716],"class_list":["post-81455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovation","tag-building-materials","tag-sustainability","tag-technology","category-145","description-off"],"yoast_head":"<!-- This site is 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