摘要
墓葬遗址的耐久性与其砌块材料的力学特性密不可分,而墓葬砖又具有文物属性,无法大量取样进行常规测试。本文采用纳米压痕仪测定方法对墓砖的表面和内部力学特性进行测试分析,通过XRD和SEM方法测试与分析墓砖表面和内部的矿物组成及微观结构。结果表明:墓砖表面和内部试样中矿物类型一致,主要包括石英、长石和云母等,矿物组成的均匀性反映了汉代在建筑材料制作上的技术成就,以及对质量控制的重视;墓砖内部的最大压入荷载、平均弹性模量、硬度和断裂韧性均高于表面,其分别为378.31 mN、50.9 GPa、4.14 GPa和4.53 MPa·m^(1/2),而表面则为406.42 mN、37.5 GPa、2.41 GPa和2.02 MPa·m^(1/2)。说明受地下水、盐等侵蚀作用,表面孔隙率高于其内部结构孔隙率,墓葬砖表面力学性能有所劣化。
The durability of these burial sites is closely linked to the mechanical properties of their masonry materials.However,due to their status as cultural relics,tomb bricks cannot be sampled in large quantities for routine testing.This work employs nanoindentation techniques to investigate the mechanical properties of both surface and interior sections of tomb bricks.X-ray diffraction(XRD)and scanning electron microscopy(SEM)are utilized to analyze the mineral composition and microstructure of these samples.The results indicate that both surface and interior samples share identical mineral types,predominantly consisting of quartz,feldspar,and mica.This uniformity in mineral composition reflects the technological advancements achieved during the Han Dynasty in producing building materials while emphasizing quality control.It was observed that due to groundwater infiltration and salt erosion,porosity levels on the surface are higher than those found within the brick interiors.Consequently,there has been a deterioration in the mechanical properties at the surface level compared to those within;specifically,maximum indentation load,average elastic modulus,hardness,and fracture toughness values for interior bricks surpass those measured at their surfaces.The recorded values for interior bricks are 378.31 mN(maximum indentation load),50.9 GPa(average elastic modulus),4.14 GPa(hardness),and 4.53 MPa·m^(1/2)(fracture toughness).In contrast,corresponding values for surface bricks are 406.42 mN(maximum indentation load),37.5 GPa(average elastic modulus),2.41 GPa(hardness),and 2.02 MPa·m^(1/2)(fracture toughness).
作者
任克彬
李新明
王志留
常宏杰
REN Kebin;LI Xinming;WANG Zhiliu;CHANG Hongjie(Henan Provincial Institute of Cultural Herigage and Archaeology,Zhengzhou,Henan 450000,China;Henan Province Institute of Cultural Relics and Monuments Protection,Zhengzhou,Henan 450002,China;School of Engineering,Zhongyuan University of Technology,Zhengzhou,Henan 450007,China)
出处
《水利与建筑工程学报》
2025年第4期94-100,共7页
Journal of Water Resources and Architectural Engineering
基金
河南省科技攻关项目“微纳尺度下MICP技术修复石质文物性能评价及其均质化技术研究”(242102320294)
河南省文物建筑保护研究院基本科研业务费项目。
关键词
纳米压痕
将军冢
墓葬砖
力学特性
微观结构
nanoindentation
Jiangjun mound
tomb bricks
mechanical activation behavior
microstructure
