Long-term Hardening Characteristics of Prestressed Anchorage Grout  

作　　者：WANG Sheng CHEN Liyi HUANG Runqiu JIANG Zhaoqun WANG Yanshu 

机构地区：[1]State Key Laboratory of Geohazard Prevention&Geoenvionment Protection,Chengdu University of Technology,Chengdu 610059,China [2]The Insititute of Exploration Technology of CAGS,Chengdu 611734,China

出　　处：《Journal of Mountain Science》2012年第6期752-759,共8页山地科学学报（英文）

基　　金：supported by National Key Technology R&D Program during the 11th Five-Year Plan Perio(Grant NO. 2008BAB29B01);State Key Program of National Natural Science of China(Grant NO. 41130745);Research foundation of the State Key Laboratory of Geohazard Prevention & Geoenvironment Protection (Grant NO.SKLGP2010Z008)

摘　　要：Grout plays an important role in the transmission and maintenance of anchoring force,and in the protection of anchorage materials against corrosion.Thus,the hardening characteristics of grout directly affect the anchoring effectivity and long-term reliability.We have excavated a prestressed anchorage which has been in service for 20 years,and have tested the grout which has worked for that long period under complicated geological conditions through strength tests and have analyzed its mineral composition using scanning electron microscopy(SEM) and X-ray diffraction(XRD).The results show that the mineral composition of the 12.5 m segment differs from other segments,and corresponds with poor coagulation characteristics of the 12.5 m segment grout.Analysis shows that unhydrated tricalcium silicate may be the reason for the localized poor coagulation.

关 键 词：Prestressed anchorage GROUT Longterm hardening characteristics Scanning electron microscopy（SEM） X-ray diffraction（XRD） 

分 类 号：TN16[电子电信—物理电子学] P642.22[天文地球—工程地质学]