Abstract
This paper presents an attempt to numerical modelling of water seepage through the connection of two concrete pipes, commonly used in the past in construction of sanitary and stormwater sewerage systems, sealed by three types of different cement-based mortars. The 2D numerical calculations were made by means of the commercial modelling software FEFLOW, WASY-DHI, especially popular in soil and environmental science. The required input data for the developed numerical model, including saturated hydraulic conductivity and retention characteristics of tested mortars, were obtained during the conducted laboratory measurements. The hydraulic characteristics of the applied concrete pipe were based on literature. The assumed boundary conditions reflected the concrete sewerage pipe filled by water to the height of 10 cm and the matric suction pressure of soil below the sand bed. Our numerical calculations showed diversified seepage intensity and accumulated volume of percolating water for the three tested mortars. The observed differences were in our opinion related to sand/cement ratio of each mortar. The higher sand content, the higher volume of seepage was noted.
Highlights
Ceramics, including concrete pipes, mortars and bricks, were in the past one of the most popular materials used in construction of the sanitary and stormwater sewages systems in Poland
Numerical modelling of water flow through porous media, extremely popular in soil and environmental science may be helpful in predicting the rate of water percolation through connection of two concrete pipes sealed by mortars
This paper presents the attempt to two-dimensional numerical prediction of seepage of water through connection of the segments of concrete pipe variable sealed by three mortars of different cement vs. sand ratio
Summary
Ceramics, including concrete pipes, mortars and bricks, were in the past (until the end of the 20th century) one of the most popular materials used in construction of the sanitary and stormwater sewages systems in Poland. Numerical modelling of water flow through porous media, extremely popular in soil and environmental science may be helpful in predicting the rate of water percolation through connection of two concrete pipes sealed by mortars.
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