不同保湿防裂类添加剂对岩石相似材料物理特性的影响  

Effect of Different Moisturizing and Anti-cracking Additives on the Physical Properties of Similar Rock Materials

作　　者：许镇 李重情[1,2,3] 岳廷乐 汤皓朋 XU Zhen;LI Zhongqing;YUE Tingle;TANG Haopeng(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;State Key Laboratory for Mining Response and Disaster Prevention and Control of Deep Coal Mines,Huainan 232001,China;Key Laboratory of Safe and Effective Coal Mining,Ministry of Education,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽准南232001 [2]深部煤矿采动响应与灾害防控国家重点实验室,安徽准南232001 [3]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽准南232001

出　　处：《湖南科技大学学报(自然科学版)》2025年第1期1-7,共7页Journal of Hunan University of Science And Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(52374179,52227901)。

摘　　要：岩石相似材料由骨料、胶结物和添加剂组成,为了探究保湿防裂类添加剂对岩石相似材料物理特性的影响,以河沙为骨料、石灰和石膏为胶结物,其中加入3%,5%和7%的甘油、石蜡和硅油,开展单轴压缩试验,观察物理参数变化.研究结果表明:3种不同添加剂条件下试样密度均呈上升趋势,但弹性模量和单轴抗压强度却呈下降趋势;其中,甘油对密度的影响大于石蜡和硅油,石蜡和硅油表现出良好的一致性,且不同添加剂在含量均为5%左右时存在转折点;随着添加剂含量的增加,试样由脆性破坏逐渐向塑性破坏转变,甘油对峰后的塑性破坏影响最为显著;弹性模量和单轴抗压强度均随着添加剂含量增加呈幂函数下降趋势,甘油的表现最为敏感,其保湿防裂性最佳,而石蜡和硅油对弹性模量和抗压强度表现出高度相似性但影响相对较小.该研究结果可为相似岩石试样的精准制作及在养护期间保持表面光滑和良好的完整性提供参考.Rock-like materials are composed of aggregate,cement and additive.In order to explore the influence of moisturizing and anti-cracking additives on the physical properties of rock-like materials,river sand is used as aggregate,lime and gypsum as cement,and 3%,5%and 7%glycerin,paraffin and silicone oil are added to the uniaxial compression test to observe the changes of physical parameters.The results show that the density of the samples under the conditions of the three different additives shows an upward trend,but the elastic modulus and uniaxial compressive strength show a decreasing trend,among which the effect of glycerol on the density is greater than that of paraffin wax and silicone oil,and the paraffin wax and silicone oil show good consistency,and the content of different additives is 5%.With the increase of additive content,the sample gradually changes from brittle failure to plastic failure,and glycerol has the most significant effect on the plastic failure after the peak,both the elastic modulus and uniaxial compressive strength show a power function downward trend with the increase of additive content,glycerol is the most sensitive,and its moisturizing and anti-cracking properties are the best,while paraffin wax and silicone oil show high similarity to elastic modulus and compressive strength,but has relatively little effect.The results of this study can provide references for the accurate fabrication of similar rock samples and the maintenance of surface smoothness and good integrity during curing.

关 键 词：岩石相似材料 甘油 石蜡 硅油 单轴压缩试验 

分 类 号：TD313[矿业工程—矿井建设]