摘要
铜-黄公路涵洞衬砌混凝土在火灾中的损伤特征显示了变色、裂隙发育和逐层剥落的宏观特征。在显微尺度下受损混凝土裂隙的类型及其扩展规律和矿物相变显示了,中等损伤程度下裂隙的扩展和爆裂作用的叠加是衬砌混凝土发生多层剥落的重要原因;受火混凝土颜色的变化主要与矿物相变和微裂隙的形成有关。
The damage features of the lining concrete of a culvert in Tong-Huang Highway after conflagration indicate color alteration, fracture developing and multi-layers of spalling.According to the damage features of the fracture types and their developing patterns, and changing of mineral phase transformation under microscopic scale, it is concluded that the superposition between fracturing and explosive spalling plays a key role in the multi-layer damages of the lining concrete.The color alteration of the damaged concrete is mainly related to micro-fracture and mineral phase transformation.
出处
《混凝土》
CAS
CSCD
北大核心
2007年第9期4-8,共5页
Concrete
关键词
火灾损伤
显微结构
颜色变化
矿物相变
衬砌混凝土
damage by fire
microscopic textures
alteration of color
mineral phase transformation
lining concrete
作者简介
马建秦（1969-）,男,博士,副教授,从事岩土与隧道工程的教学与科研工作.单位地址：西安市南二环中段长安大学本部330信箱（710064）联系电话：13991817707
