[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-650221-105":59,"doc-detail-650221-en":122},{"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":115,"head_meta":117,"extra_data":119,"updated_unix":121},105,"en","repair-of-concrete-post-tensioning-repairs-and-modifications","Repair of Concrete - Post Tensioning Repairs and Modifications","","This document provides a comprehensive technical overview of post-tensioning (PT) system failures, deterioration mechanisms, and structural remediation practices. Authored by Pete Barlow of Contech Services, the report outlines critical environmental and mechanical factors contributing to tendon corrosion and anchorage failure, including chloride exposure, inadequate grouting, improper placement, and accidental damage from construction activities like core drilling. The content serves as a professional assessment of common PT structural vulnerabilities, such as poor consolidation, shrinkage, and the lack of protective caps. By analyzing visual evidence of rusted cables and compromised anchorage points, the document emphasizes the importance of proper protective measures in concrete maintenance to ensure the long-term integrity of post-tensioned parking structures and similar infrastructure projects. It functions as an essential guide for engineers and contractors tasked with diagnosing and repairing complex post-tensioning systems effectively.",{"@graph":69,"@context":114},[70,84,105],{"@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/repair-of-concrete-post-tensioning-repairs-and-modifications/650221/",{"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/repair-of-concrete-post-tensioning-repairs-and-modifications/650221.png","ImageObject",300,407,{"name":92,"@type":93},"naya.afterrain","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108],{"name":109,"@type":110,"acceptedAnswer":111},"What role do unprotected anchors play in system failure?","Question",{"text":112,"@type":113},"Unprotected anchors are highly susceptible to corrosion, especially when they lack grease caps or proper environmental sealing, leading to failed post-tensioning and potential structural weakness.","Answer","https://schema.org",{"og:url":83,"og:type":116,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":118,"canonical":83},"index,follow",{"doc_id":120,"site_id":62},650221,1792821366,{"code":4,"msg":5,"data":123},{"doc_id":120,"user_id":124,"nickname":92,"user_avatar":125,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":126,"file_id":127,"file_url":128,"file_type":129,"file_size":130,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":131,"language":132,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":133,"faqs":134,"seo_title":135,"seo_description":67,"update_tm":121,"read_time":136},962094248482,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","# Repair of Concrete Session in Memoryof Tony Murray\n\nPost Tensioning Repairs andModifications  \nPete Barlow-Vice President  \nContech Services,Inc.  \n## Conditions that Lead to Damage orDeterioration\n\n·Not Encapsulated/Protected  \n·Improper Handling DuringPlacement  \n·Improper Grouting  \n·Exposure to High Concentrations ofChemicals/Chlorides  \n·Post Stressing Errors  \n·Core Drillers/Saw Cutters  \n·Post Installed Anchors  \n## Conditions that Can Lead to PT Deterioration\n\nChloride Accelerators in Grout  \nPoorly Protected or Unprotected Anchors  \n## Grease Only—No Grease Cap\n\n## Failed Post Tensioning Due to Anchorage Corrosion\n\nExternal Post Tensioning  \nLaying on the Parking Garage SlabMonday Morning  \n## Design and Environmental Concerns\n\n## Previously Unprotected Anchors\n\n## Post Stressing Errors\n\n·Shrinkage  \n·Tempering  \n·Poor Consolidation  \n·Addition of Chlorides  \n## Grout Issues\n\nVarying Qualities of Grout  \n## Stressing Pocket Grouting","cbCaipKq5aVtxaA5","https://ap.wps.com/l/cbCaipKq5aVtxaA5","pdf",5808369,22,"English","# Conditions Leading to PT Deterioration\n## Environmental and Mechanical Damage Factors\n## Grout and Anchorage Issues\n## Post-Stressing Errors and Mitigation","[{\"question\":\"What role do unprotected anchors play in system failure?\",\"answer\":\"Unprotected anchors are highly susceptible to corrosion, especially when they lack grease caps or proper environmental sealing, leading to failed post-tensioning and potential structural weakness.\"}]","Repair of Concrete - Post Tensioning Repairs and Modifications | PDF",55]