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Micro-Experimental Studies and Theoretical Analysis on Permeability of Micro-Fine Cement

Author: ZhangYanQi
Tutor: QiaoWeiGuo
School: Shandong University of Science and Technology
Course: Geotechnical Engineering
Keywords: Superfine cement Rheological properties Model test Can be injected Morphology
CLC: TQ172
Type: Master's thesis
Year: 2010
Downloads: 120
Quote: 0
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Abstract


Due to the depletion of coal resources of the shallow , deep well construction is imperative. With the deepening of the mine shaft depth , formation pressure increases , the hydrostatic pressure is also growing in mine shaft concrete shaft lining in high pressure , the micro fracture seepage effect increases rapidly under high water pressure , resulting in wellbore inflow exceeded . The grouting method Combat Shaft Wall seepage water is the most effective method the current grouting materials and grouting process , however , are for various reasons, is difficult to achieve the desired effect . Ultrafine cement high durability , low cost , environmental pollution and other characteristics of the decision , it will become the the ideal microfissure grouting materials . This thesis for ultrafine cement from the following four aspects of experimental research : First, experimental study is based on the basic physical and mechanical properties of ultrafine cement their rheological properties of the slurry . Come to the impact of the water-cement ratio and superplasticizer on the ultrafine cement slurry viscosity , time-varying characteristics of ultrafine cement slurry viscosity , as well as water-reducing agent slurry viscosity degeneration investigated . Second, the similarity theory based on the rock mass microfissure similar model design . Stainless steel strainer with different aperture the simulation corresponding degree of opening the rock microfissure ; and model superfine cement slurry injection test research ; Finally, the model test results applied to rock mass microfissure . Third , the use of a scanning electron microscope to observe the morphology of the the ultrafine cement slurry stones body , from the microscopic point of water-cement ratio and superplasticizer on ultrafine cement slurry stones bonded state . Fourth, the departure from the rock single fracture geometry parameters and the the ultrafine cement slurry flow pattern , the theoretical study of the ultrafine cement slurry flow law , obtained in the two - dimensional smooth micro-cracks in the flow equation .

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CLC: > Industrial Technology > Chemical Industry > Silicate > Cement Industry
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