为探究环氧灌浆料在石英砂界面的吸附特性,利用石英砂制作填砂模型,以吸附量为指标,着重考察注浆压力、含水率、温度等对环氧灌浆料在石英砂界面吸附特性的影响。试验结果表明:环氧灌浆料在石英砂界面的吸附量随着注浆压力(p＜0.7 MPa时)的升高先增大,而后当注浆压力超过一定值(p＞0.8 MPa)时浆液吸附量随注浆压力升高而逐渐减少;由于环氧树脂和水分子的竞争性吸附关系,浆液吸附量随石英砂含水率的提高而减少,最终达到稳定值;由于浆液吸附受分子活性及浆液黏度的双重影响,浆液吸附量随温度的升高逐渐减少。研究结果可为灌浆工程中注浆压力控制、温度控制及浆液改性等方面提供借鉴。
Abstract
The effects of grouting pressure, moisture content and temperature on the adsorbing capacity of epoxy resin grouting agent on the surface of silica sand were researched using a sand-packed model. Test results showed that the adsorbing capacity of epoxy resin grouting agent on the surface of silica increased with the increasing of grouting pressure when the pressure was under 0.7 MPa but decreased when the pressure was over 0.8 MPa. Adsorbing capacity of epoxy resin grouting agent decreased with raising moisture content of silica sand due to competitive adsorption between epoxy resin molecule and water molecule. Adsorbing capacity of epoxy resin grouting agent reduced sharply with raising temperature attributing to the influence of molecular activity and viscosity. Results of the study provided a reference for the control of grouting pressure and temperature and also for the modification of epoxy resin grouting agent.
关键词
环氧树脂 /
灌浆材料 /
石英砂 /
吸附特性 /
浆液黏度
Key words
epoxy resin /
grouting agent /
silica sand /
adsorption characteristics /
viscosity
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基金
国家自然科学基金项目(41272331,51204027);中国地质调查局资助项目(12120113017300);地质灾害防治与地质环境保护国家重点实验室自由探索课题项目(SKLGP2012Z007)
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