In order to study the influence of temperature on compressive strength of polymer grouting material,the compression specimen injection mold is self-made,and the uniaxial compressive test was carried out in the tempera...In order to study the influence of temperature on compressive strength of polymer grouting material,the compression specimen injection mold is self-made,and the uniaxial compressive test was carried out in the temperature control box under different temperatures.The change regularity of compressive strength of polymer grouting material under different temperatures and the law of volume changes of polymer samples were obtained.The experimental results show that:the compressive strength of polymer material increases with the increase of density;the temperature change has a certain influence on the compressive strength of polymer grouting material;the compressive strength decreases with temperature increases under the same density,but the compressive strength is not significantly affected by temperature when the density is less than 0.4 g/cm3;the volume change of the samples accords with the law of thermal expansion and contraction when temperature changes,and the increase of the volume is obvious when it is under high temperature.The achievements will provide an important basis to the application of the polymer grouting material.展开更多
The viscosity evolution for different temperatures was studied experimentally.A time-varying viscosity model was derived and the influence of the initial temperature on gel time was analyzed.The experimental results s...The viscosity evolution for different temperatures was studied experimentally.A time-varying viscosity model was derived and the influence of the initial temperature on gel time was analyzed.The experimental results show that the viscosity of polymer grout increases exponentially with time.It can be divided into two phases.Before gelation,the viscosity variable quantity is very small.At the gel point,there is a sudden increase in viscosity.The initial viscosity and gel time decrease with the increasing initial temperature within a certain range,The study contributes to deepening understanding of the rheological properties of polymer grout,which can provide some references for polymer grouting construction.展开更多
文摘In order to study the influence of temperature on compressive strength of polymer grouting material,the compression specimen injection mold is self-made,and the uniaxial compressive test was carried out in the temperature control box under different temperatures.The change regularity of compressive strength of polymer grouting material under different temperatures and the law of volume changes of polymer samples were obtained.The experimental results show that:the compressive strength of polymer material increases with the increase of density;the temperature change has a certain influence on the compressive strength of polymer grouting material;the compressive strength decreases with temperature increases under the same density,but the compressive strength is not significantly affected by temperature when the density is less than 0.4 g/cm3;the volume change of the samples accords with the law of thermal expansion and contraction when temperature changes,and the increase of the volume is obvious when it is under high temperature.The achievements will provide an important basis to the application of the polymer grouting material.
基金Funded by the National Key Research and Development Plan(Nos.2017YFC0504503 and 2018YFB1600200)the Program for Science and Technology Innovation Talents in Universities of Henan Province(No.19HASTIT041)+4 种基金the National Natural Science Foundation of China(Nos.51908514,51878624,51878622,and U1404525)the Natural Science Foundation of Henan Province(No.202300410746)the Key Research Projects of Higher Education in Henan Province(No.18A580001)the Program for Innovative Research Team(in Science and Technology)at the University of Henan Province(No.18IRTSTHN007)the Major Scientific and Technological Special Project in Henan(No.181100310400)。
文摘The viscosity evolution for different temperatures was studied experimentally.A time-varying viscosity model was derived and the influence of the initial temperature on gel time was analyzed.The experimental results show that the viscosity of polymer grout increases exponentially with time.It can be divided into two phases.Before gelation,the viscosity variable quantity is very small.At the gel point,there is a sudden increase in viscosity.The initial viscosity and gel time decrease with the increasing initial temperature within a certain range,The study contributes to deepening understanding of the rheological properties of polymer grout,which can provide some references for polymer grouting construction.