木质纤维对充填体力学特性的影响研究  

Study on Influence of Wood Fiber on Mechanical Properties of Filling Body

作　　者：徐敏[1] 徐路路 石磊[1] 史洪健 XU Min;XU Lulu;SHI Lei;SHI Hongjian(Anhui Development Mining Co.,ltd.)

机构地区：[1]安徽开发矿业有限公司,安徽省六安市237474

出　　处：《现代矿业》2024年第2期1-5,共5页Modern Mining

摘　　要：木质纤维材料凭借其强韧性、吸附性、组成元素简单的优势,在土木工程和环境工程领域得到广泛使用。为研究其作为添加剂对充填体力学性能的影响,通过充填体强度测试实验,结合SEM电镜扫描实验、EDS实验、XRD能谱分析实验,观察充填体内部水化反应程度。研究结果表明:在一定添加范围内,木质纤维提高了充填体的抗压强度,且作用效果随着灰砂比、料浆浓度的变化而改变;在应力-变形曲线峰前阶段,纤维充填体具有较高的弹性模量,在峰后阶段,纤维充填体具有较大的残余强度,能够储存的能量较高。充填体在失稳破坏后断裂而不垮,表现出良好的塑性变形;同时,木质纤维的添加利于充填体内部水化反应,内部絮状结构明显增多,增加了充填体的强度。Wood fiber materials are widely used in civil engineering and environmental engineering due to their advantages of strong toughness,adsorption and simple composition elements.The wood fiber was used as an additive material,and the influence of wood fiber as an additive on the mechanical properties of the filling body was studied by using the strength and toughness and surface structure of the wood fiber mate-rial itself.Mainly through the filling body strength test experiment,combined with SEM electron microscope scanning experiment,EDS experiment,XRD energy spectrum analysis experiment,observe the degree of hy-dration reaction inside the filling body.The results show that within a certain range of addition,wood fiber improves the compressive strength and strain strength of the filling body,and the effect changes with the change of cement-sand ratio and slurry concentration.In the pre-peak stage of the stress-strain curve,the fi-ber filling body has a higher elastic modulus.In the post-peak stage,the fiber filling body has a larger resid-ual strength and can store higher energy.The filling body breaks after instability and does not collapse,show-ing good plastic deformation.At the same time,the addition of wood fiber is beneficial to the internal hydra-tion reaction of the filling body,and the internal flocculent structure increases obviously,which increases the strength of the filling body.

关 键 词：全尾砂胶结充填 木质纤维 单轴抗压强度 SEM-EDS 

分 类 号：TU31[建筑科学—结构工程]