Research on the Mix Design of Plastic Concrete Anti-seepage Wall and its Application in Hydraulic Engineering
Based on the construction requirements of a certain water conservancy hub's plastic concrete anti-seepage wall,a study was conduc-ted on the mix design of plastic concrete using cement content,bentonite content,and sand ratio as parameters.The influence of each parame-ter on the flow performance,mechanical properties,and anti-seepage performance of plastic concrete was analyzed.The results show that in-creasing the cement content can improve the mechanical and anti-seepage properties of plastic concrete under the same water cement ratio.When the cement content is increased from 80 kg/m3 to 200 kg/m3,the compressive strength and elastic modulus of plastic concrete increase by 2.3 MPa and 239 MPa,respectively,and the relative permeability coefficient decreases by 0.411×10-7 cm/s.Under the same cement con-tent,increasing the content of bentonite can improve the impermeability of plastic concrete,but it will lead to a decrease in the flowability and mechanical properties of plastic concrete;Appropriately increasing the sand ratio can help reduce the relative permeability coefficient and im-prove the impermeability performance of plastic concrete.C160B80SR60 was selected as the construction mix ratio for the plastic concrete anti-seepage wall in this project.After 28 days of curing,the average permeability coefficient of the plastic concrete was measured to be 6.13×10-8 cm/s,which meets the design and specification requirements.
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