[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-268675-105":59,"doc-detail-268675-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","bending-characteristics-of-clt-from-recovered-spruce-research-report","Bending Characteristics of CLT from Recovered Spruce - Research report","","The circular use of construction materials is a key strategy to reduce the environmental impact of the construction sector. Structural timber recovered from demolition—such as spruce from a roof structure—can become feedstock for new cross-laminated timber (CLT) panels. This paper studies three-layer CLT produced from recovered spruce, compares it with panels made from new timber, and evaluates hybrid panels combining both sources. Bending testing shows equivalent strength and stiffness for CLT using recovered timber.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/bending-characteristics-of-clt-from-recovered-spruce-research-report/268675/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/bending-characteristics-of-clt-from-recovered-spruce-research-report/268675.png","ImageObject",300,407,{"name":92,"@type":93},"Gelato","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-09-15",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",16,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What material source is studied for CLT panels in this paper?","Question",{"text":113,"@type":114},"The paper investigates spruce recovered from demolition of a roof structure and uses it to manufacture CLT panels.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How are the CLT panels compared in the bending tests?",{"text":118,"@type":114},"The study tests three-layer panels made from recovered spruce, panels made from new timber, and hybrid panels that mix new and recovered timber.",{"name":120,"@type":111,"acceptedAnswer":121},"What overall result is reported for panels made with recovered timber?",{"text":122,"@type":114},"CLT panels using recovered timber show bending performance equivalent to panels made from new timber in terms of strength and stiffness.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},268675,1789434604,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":34,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":130,"read_time":144,"preview_page_count":4},19241457091524,"https://us-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","BENDING CHARACTERISTICS OF CLT FROM RECOVERED SPRUCE  \nCaitríona Uí Chúláin1, Daniel F. Llana2, Paul Hogan3, Patrick McGetrick4, Annette M. Harte5  \nABSTRACT: The circular use of construction materials is an essential step in the drive to reduce the environmental impact of the construction sector. Structural materials, such as timber, recovered from demolition of buildings is a valuable resource. Reuse or recycling these materials in new buildings products reduces waste and the overall carbon footprint of the build environment. This paper investigates the use of spruce recovered from demolition of a roof structure in the manufacture ofCLT panels. Bending tests are performed on 3-layer panels made from this recovered material and also on panels made from new timber and hybrid panels with mixed new and recovered timber. Results show that the performance of CLT panels using recovered timber is equivalent to that of panels from new timber in terms of bending strength and stiffness.  \nKEYWORDS: recovered timber, circular construction, mass timber, spruce, Douglas fir, secondary timber, salvaged, reclaimed  \n1 INTRODUCTION  \nThe construction sector is the largest consumer of raw materials and accounts for about 50% of all extracted materials [1,2] and the built environment is responsible for 25-40% of global carbon emissions [1] . At the sametime, the OECD has predicted that the world’s consumption of raw materials will more than double over the period 2017-2060 [3] and the construction sector will account for much of this increase.  \nTo address this, policy initiatives aimed at enhancing the sustainability of the construction sector have been introduced as a key priority for Europe. As part of the European Green Deal, the European Commission in 2020 adopted a new Circular Economy Plan [2], which promotes circularity principles throughout the lifecycle of buildings. It is addressing the sustainability performance of construction products through revision of the Construction Product Regulation, including the possible introduction of recycled content requirements for certain construction products and revising material recovery targets set in EU legislation for construction and demolition waste.  \n1 Caitríona Uí Chúláin, Timber Engineering Research Group (TERG), University of Galway, Ireland, [caitriona.uichulain@universityofgalway.ie](caitriona.uichulain@universityofgalway.ie)  \n2 Daniel F. Llana, Timber Construction Research Group, Universidad Politécnica de Madrid, Spain, [d.f.llana@upm.es](d.f.llana@upm.es)[ ](d.f.llana@upm.es)3 Paul Hogan, Hegarty Demolition, Ireland, [paul@hegartydemolition.ie](paul@hegartydemolition.ie)  \nAs construction and demolition is currently responsible for more than a third of all waste within the EU [4], reuse and recycling of building materials has the potential to significantly reduce this waste and also reduce the carbon footprint of the built environment through extending the life span of building components.  \nTimber recovered from buildings at the end of life, often referred to as recovered or secondary timber, is a valuable natural resource with significant potential for reuse and recycling. To optimise the environmental benefits of reuse and recycling and support the circular economy, recovered timber should be used in long-life products, such as structural products for buildings. However, inmost European countries timber construction and demolition waste is, for the most part, converted into chips for use in energy production with smaller amounts used for particle board or pallet block manufacture and for composting [5-7] . Key factors inhibiting reuse of recovered timber in the manufacture of structural products are the fact that it is currently prohibited by regulations and that grading standards are not available. To support the development of standards on the reuse of timber, further research is necessary concerning the properties of recovered timber and identification and characterisation ","cbCailZjbH8Y1MIt","https://ap.wps.com/l/cbCailZjbH8Y1MIt","pdf",2178304,"English","# Introduction\n## Circular economy and reclaimed timber\n## CLT background and motivation\n## Aim and experimental scope","[{\"question\":\"What material source is studied for CLT panels in this paper?\",\"answer\":\"The paper investigates spruce recovered from demolition of a roof structure and uses it to manufacture CLT panels.\"},{\"question\":\"How are the CLT panels compared in the bending tests?\",\"answer\":\"The study tests three-layer panels made from recovered spruce, panels made from new timber, and hybrid panels that mix new and recovered timber.\"},{\"question\":\"What overall result is reported for panels made with recovered timber?\",\"answer\":\"CLT panels using recovered timber show bending performance equivalent to panels made from new timber in terms of strength and stiffness.\"}]","Bending Characteristics of CLT from Recovered Spruce - Research report | PDF",18]