塑性混凝土抗渗性能研究及在大坝防渗墙中的应用OA

According to the characteristics of plastic concrete in mix proportion design,four main mix proportion parameters,including unit water consumption,bentonite content,water binder ratio and sand ratio,were selected to study the influence of each parameter on the impermeability of plastic concrete.The research shows that when other conditions remain unchanged,the permeability coefficient of plastic concrete increases with the increase of unit water consumption,water binder ratio and bentonite content,and has a linear relationship with bentonite content and unit water consumption,in which water binder ratio and bentonite content are the main influencing factors.In the actual engineering mix proportion design,it is necessary to comprehensively consider the influence of different mix proportion parameters on various performances and make optimal selection.The unit water consumption and sand ratio should make the plastic concrete have the slump and good cohesion required by the design.The water binder ratio and bentonite content should make the plastic concrete have the properties of low permeability coefficient,low elastic modulus and high compressive strength at the same time.The water binder ratio should be 0.9～1.1,the bentonite content should be 40%～60%,and the sand ratio should be 45%～60%.Through the experimental research,the plastic concrete mix proportion of the anti-seepage wall of Bandong reservoir is put forward.The construction process is smooth.After sampling and testing,all aspects of performance meet the design requirements,and the anti-seepage effect is good.