冻融循环对水工混凝土孔结构的影响研究  

Study on the Influence of Freeze-thaw Cycles on the Pore Structure of Hydraulic Concrete

作　　者：李巍 LI Wei(People's Government of Zhangwu Town,Zhangwu County,Fuxin Liaoning 123200)

机构地区：[1]彰武县彰武镇人民政府,辽宁阜新123200

出　　处：《中国科技纵横》2024年第10期82-84,共3页China Science & Technology Overview

摘　　要：本文使用透射成像和压汞法,深入探究了水工混凝土孔结构随冻融循环的劣化损伤特征。结果显示,冻融循环使临界孔径和毛细孔等有害孔数量明显增加,对表层混凝土的孔结构劣化和强度降低产生了重要影响,且存在由表及里的损伤梯度。为保证水工结构的安全运行及其整体抗冻性能,可以采用结构表面涂覆技术。In this paper,transmission imaging and mercury intrusion are used to explore the deterioration damage characteristics of hydraulic concrete pore structures with freeze-thaw cycles.The results show that the freeze-thaw cycle significantly increases the number of harmful pores such as critical pore size and capillary pores,which has a serious impact on the deterioration of the pore structure and the reduction of strength of the surface concrete,and there is a damage gradient from the surface to the inside.In order to ensure the safe operation of hydraulic structures and their overall frost resistance,structural surface coating technology can be adopted.

关 键 词：冻融循环 孔隙结构 压汞试验 水工混凝土 

分 类 号：TV431[水利工程—水工结构工程]