动静载作用下砂浆-岩石试件断裂特性试验研究  

Experimental Study on Fracture Characteristics of Mortar-rock Specimens Under Dynamic and Static Loading

作　　者：王凤琴 汪海波[1] 王浩 宗琦[1] WANG Fengqin;WANG Haibo;WANG Hao;ZONG Qi(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《佳木斯大学学报（自然科学版）》2023年第5期87-91,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：安徽省自然科学基金面上项目(2008085ME163)。

摘　　要：岩石和砂浆间的界面过渡区易出现裂隙区,而岩体结构又极易承受动态荷载的作用,因此研究岩石砂浆这个界面过渡区性能和破碎特征就具有十分重要的意义。研究砂浆-岩石双材料巴西圆盘模型,通过对两种界面粗糙度以及三种砂子粒径(细、中、粗)的砂浆-岩石组合试件进行静态和动态加载,研究其力学性能和破坏特征。结果表明,粗糙面试件的抗拉强度要大于光滑面的试件,光滑面花岗岩-砂浆试件与粗糙面花岗岩-砂浆试件静态抗拉强度之比为67.3%,光滑面石灰岩岩-砂浆试件与粗糙面石灰岩-砂浆试件静态抗拉强度比为56.8%,岩石本身强度对双材料试件的抗拉强度有一定的影响。在同等粗糙度情况下,中砂试件的抗拉强度是最大的。在应变中,粒径级配和粗糙度对试件的影响较大,岩石种类对试件的影响较小,且同等条件下粗砂试件应变大于细砂和中砂试件。The interface transition area between rock and mortar is easy to appear crack area,and the rock mass structure is easy to bear the role of dynamic load,so it is of great significance to study the performance and crushing characteristics of the interface transition area of rock mortar.Study the Brazilian disk model of mortar-rock double material,and study the mechanical properties and failure characteristics of two kinds of interface roughness and three kinds of mortar-particle size(fine,medium and coarse).The results show that the tensile strength of rough interview is greater than that of smooth surface test,the ratio of smooth granite-mortar test and rough surface granite-mortar test is 67.3%,the static tensile strength ratio of smooth limestone-mortar test and rough surface limestone-mortar test is 56.8%,and the strength of rock itself has certain influence on the tensile strength of double material test.Under the same roughness condition,the tensile strength of the medium sand test piece is the maximum.In the strain,the particle size grading and roughness have a great influence on the specimen,the rock type has a little influence on the specimen,and the strain of the coarse sand specimen is greater than the fine sand and medium sand specimen under the same conditions.

关 键 词：双材料巴西圆盘 界面过渡区 粗糙度 劈裂试验 抗拉强度 

分 类 号：TU45[建筑科学—岩土工程]