[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-268726-105":59,"doc-detail-268726-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","charlotte-douglas-international-airport-clt-reconstruction-works-with-rapid-hardening-concrete-concretum-q-flash-220-project-report","Charlotte Douglas International Airport CLT - Reconstruction Works with Rapid-Hardening Concrete Concretum® Q-FLASH 2/20 - Project Report","","Charlotte Douglas International Airport (CLT) used Concretum® Q-FLASH 2/20 rapid-hardening concrete to replace five taxiway slabs totaling 31 yd³ each and to perform a 350 yd² surface replacement. The project ran in July 2023 with air temperatures between 77–86 °F, while concrete was kept workable at 81–86 °F. Delivery, production, transportation, and placement were coordinated to keep curing efficient within an open time of about 60 minutes, supporting night-shift runway operations.",{"@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/charlotte-douglas-international-airport-clt-reconstruction-works-with-rapid-hardening-concrete-concretum-q-flash-220-project-report/268726/",{"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/charlotte-douglas-international-airport-clt-reconstruction-works-with-rapid-hardening-concrete-concretum-q-flash-220-project-report/268726.png","ImageObject",300,407,{"name":92,"@type":93},"Asher","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-28","2026-09-15",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",15,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What concrete product was used for the CLT reconstruction works?","Question",{"text":113,"@type":114},"Concretum® Q-FLASH 2/20 rapid-hardening concrete was used for replacing slabs and performing surface replacement works at Charlotte Douglas International Airport (CLT).","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How long was the workable/open time during placement?",{"text":118,"@type":114},"The project reported an open time of approximately 60 minutes, enabling efficient placement and finishing under active site conditions.",{"name":120,"@type":111,"acceptedAnswer":121},"What was the purpose of the rapid-hardening concrete in this airport schedule?",{"text":122,"@type":114},"The mix was selected to achieve early strength quickly so that pavement sections could be reopened after a night shift, minimizing disruption to air traffic.","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},268726,1789435825,{"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":19,"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":52,"preview_page_count":4},687197207639,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Project Report  \nReconstruction Works with Rapid-Hardening Concrete Concretum® Q-FLASH 2/20  \nCharlotte Douglas  \nInternational Airport CLT  \nTaxilane  \nStands  \nApron  \nRapid-hardening concrete:  \nFirst placement of Concretum® Q-FLASH 2/20 in the USA  \nProject Overview  \nConcretum® Q-FLASH 2/20, the latest generation of rapidhardening concrete, was used for the replacement of 5 slabs,  \n31 yd³ each, on one of the busiest taxi lanes at CLT. The  \n5 slabs will prove Concretum® Q-FLASH 2/20’s multi decadelonglifespan and its resistance against high traffic load and aging factors.  \nPROJECT FACTS  \nIn this project, the taxilane underwent surface replacement of 350 yd² for enhanced durability and appearance. The prevailing air temperature during the project ranged between 77 to 86 °F, proving the concrete is also workable in tough conditions. The concrete maintained a temperature of 81 to 86 °F throughout its application, promoting effective curing. Notably, the project had an open time of approximately 60 minutes, providing a critical window for executing essential tasks efficiently.  \nConcretum® CEM 100 cement bag delivery  \nMATERIAL DELIVERY AND PRODUCTION  \nThe project was executed in July 2023. In total 5 containers containing 96 cement bags of 1000 kg each and 4000 kg of admixtures were shipped to Charlotte in previous months. The cement and admixtures can be handeled and stored like conventional products, ready to be used in a concrete batching plant.  \nFor CLT’s slabs replacement the concrete was initially tested and trialed in a concrete plant laboratory nearby the airport. The concrete production and the transportation time lasted around 20 minutes, the concrete remained workable for approximately 60 minutes, enough time to place and finish it.  \n  Runway reconstruction with Concretum®  \nConcrete trials before production  \nMetric to imperial system – unit conversion | 1 cm = 0.39 in | 1 m = 3.28 ft | 1 m² = 10.76 ft² | 1 m³ = 1.31 yd³ | 20 °C = 68 ° F | 1 N/mm ² = 1 MPa = 145.04 psi  \nProject Report  \nCharlotte Douglas International Airport CLT  \nRapid-hardening concrete trial track:  \n86 °F  \nConcrete temp.  \n1 hr  \nWorkable time  \n78 yd ³  \nConcrete per night  \n515 psi  \n4 hrs flexural strength  \n350 yd ²  \nTotal surface replaced  \nCLT Airport placement of concrete  \nCONCRETE SPECIFICATIONS  \n\n| Product | Concretum® Q-FLASH 2/20 |\n| --- | --- |\n| Exposure class | XC4, XD3, XF4 |\n| Strength class | C50/60 |\n| Consistency | Slump 6 inches to 9 inches |\n| Max . aggregate size | 1 inch, crushed |\n| CONCRETE PROPERTIES |  |\n| Shrinkage ɛSH | ≤ 0.25‰ |\n| Heat of hydration (NF EN 196-9) | 210 kJ/kg |\n| Flexural strength 4 h | 515 psi |\n| Flexural strength 5 h | 540 psi |\n| Flexural strength 24 h | 990 psi |\n| Moisture content 3 h after setting | ≤ 4 CM-% |\n\nCLT Airport finished slab  \nConcretum® Q-FLASH 2/20 high-early strength concrete was especially developed for time sensitive concrete constructions, while providing decades-long life span. One of its most common uses is the overnight airport concrete pavement replacement.  \nThe concrete reaches a compressive strength of 3000 psi in less than 2 hours after concrete production and a flexural strength of 500 psi in less than four hours after production (500 psi is the FFA minimum requirement to reopen the pavement section) . This allows full slab replacement in a night shift, minimizing the disruption to the air traffic.  \nFigure 1: Diagramm of possible effective production output of rapid-hardening concrete  \nSuggested Schedule 11 PM 12 AM 1 AM 2 AM 3 AM 4 AM 5 AM 6 AM  \n\n| Preparation | | | |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n| Runway closure by air traffic control |  | |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |\n| Excavation","cbCaiuIkm9aShvnX","https://ap.wps.com/l/cbCaiuIkm9aShvnX","pdf",4459869,"English","# Project Overview\n## Project Facts\n## Material Delivery and Production\n## Concrete Specifications\n## Concrete Performance and Scheduling","[{\"question\":\"What concrete product was used for the CLT reconstruction works?\",\"answer\":\"Concretum® Q-FLASH 2/20 rapid-hardening concrete was used for replacing slabs and performing surface replacement works at Charlotte Douglas International Airport (CLT).\"},{\"question\":\"How long was the workable/open time during placement?\",\"answer\":\"The project reported an open time of approximately 60 minutes, enabling efficient placement and finishing under active site conditions.\"},{\"question\":\"What was the purpose of the rapid-hardening concrete in this airport schedule?\",\"answer\":\"The mix was selected to achieve early strength quickly so that pavement sections could be reopened after a night shift, minimizing disruption to air traffic.\"}]","Charlotte Douglas International Airport CLT - Reconstruction Works with Rapid-Hardening Concrete Concretum® Q-FLASH 2/20 - Project Report | PDF"]