详情

原文传递 Characterization of materials used in field-cast precast concrete connections

题名：	Characterization of materials used in field-cast precast concrete connections
正文语种：	英文
作者：	Matthew K. Swenty;Benjamin A. Graybeal
作者单位：	Virginia Military Institute
关键词：	Accelerated construction;bridge;cable grout;connection;epoxy grout;field casting;grout;high-strength cementitious grout;magnesium phosphate grout;UHPC;ultra-high-performance concrete
摘要：	In precast concrete construction, completing the connections is one of the most critical field construction processes. Short-term construction-related issues along with long-term performance problems have been attributed to the field-cast materials used in the connections. This research investigated the performance of a variety of materials that may be used in precast concrete field-cast connections. The categories included high-strength cementitious grout, epoxy grout, magnesium phosphate grout, ultra-high-performance concrete (UHPC), cable grout, and conventional bridge deck concrete. Performance categories investigated included mechanical strength and shrinkage, bond strength, and durability. Standard ASTM tests, along with newly developed bond and shrinkage tests, were applied. The UHPC and epoxy grout samples showed good performance for accelerated construction projects. The high-strength cementitious grouts exhibited performance similar to a standard concrete mixture in most categories. Because a wide range of material performances are achievable, the critical parameters should be carefully considered when selecting connection systems.
出版日期：	2017.11-12
出版年：	2017
期刊名称：	PCI-Prestressed Concrete Institute Journal
卷：	Vol.61
期：	No.06
页码：	33-44